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Home > LEU ALL precursor B-cell - AALL1131 [very high risk] > LEU - AALL1131 Interim maintenance 1
This regimen is a component of LEU ALL precursor B-cell - AALL1131 [very high risk]

AALL1131 [very high risk] - Interim maintenance 1 (LEU ALL precursor B-cell - AALL1131 [very high risk])

Treatment Overview

Starts on day 57 of Consolidation or count recovery, whichever occurs later.  

Prior to each dose of high dose metHOTREXATe neutrophils should be greater than 0.75 x 109/L and platelets greater than 75 x 109/L.


High dose metHOTREXATe

  • metHOTREXATe levels MUST be measured once every 24 hours.
  • Intravenous alkalinized fluids MUST be commenced at least 6 hours before the start of metHOTREXATe infusion and MUST continue until the metHOTREXATe serum level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice). Additional oral alkalinization can be considered as Ural® 2 sachets orally the night before and 2 sachets the morning of high dose metHOTREXATe infusion.
  • Before commencing the high dose metHOTREXATe infusion, urinary pH MUST be 7.5 or above (pH 7.5 to 8.0).
  • Closely monitor renal function, electrolytes, fluid balance, and weight.
  • foliNIc acid MUST start 42 hours after start of metHOTREXATe infusion and MUST continue to be administered for a minimum of 3 doses AND until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).

Cycle 1 - 63 days

Cycle length:
63

Intrathecal metHOTREXATe:

  • Administer within 6 hours either side of high dose metHOTREXATe infusion.
  • For Ommaya reservoir reduce dose to 6 mg intraventricularly.

foliNIc acid: MUST start 42 hours after start of metHOTREXATe infusion and MUST continue to be administered every 6 hours for at least 3 doses AND until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).


mercaptOPURine: Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients.

Cycle details

Cycle 1 - 63 days

Medication Dose Route Days Max Duration
metHOTREXATe * 15 mg intrathecal injection 1, 29
vinCRISTine * 1.5 mg/m² Cap dose per administration at: 2 mg intravenous 1, 15, 29,
43		 10 minutes
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous 1 to 4,
15 to 18,
29 to 32,
43 to 46
sodium bicarbonate 50 mmol intravenous 1 to 4,
15 to 18,
29 to 32,
43 to 46
acetazolamide * 250 mg Four times daily oral administration 1 to 4,
15 to 18,
29 to 32,
43 to 46
metHOTREXATe 500 mg/m² intravenous 1, 15, 29,
43		 30 minutes
metHOTREXATe 4500 mg/m² intravenous 1, 15, 29,
43		 23.5 hours
foliNIc acid (as calcium folinate) 15 mg/m² Every six hours intravenous 2, 3, 4,
16, 17, 18,
30, 31, 32,
44, 45, 46		 2 minutes
mercaptOPURine * 25 mg/m² Once daily oral administration 1 to 56

Intrathecal metHOTREXATe:

  • Administer within 6 hours either side of high dose metHOTREXATe infusion.
  • For Ommaya reservoir reduce dose to 6 mg intraventricularly.

foliNIc acid: MUST start 42 hours after start of metHOTREXATe infusion and MUST continue to be administered every 6 hours for at least 3 doses AND until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).


mercaptOPURine: Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients.

Full details

Cycle 1 - 63 days

Day: 1

Medication Dose Route Max duration Details
metHOTREXATe * 15 mg intrathecal injection
Instructions:
  • Adhere to local institution policy for intrathecal administration.
  • For Ommaya reservoir reduce dose to 6 mg intraventricularly.
  • Administer within 6 hours either side of high dose metHOTREXATe infusion. 
vinCRISTine * 1.5 mg/m² Cap dose per administration at: 2 mg intravenous 10 minutes
Instructions:
  • Diluted in a minibag.
  • FOR INTRAVENOUS USE ONLY – fatal if given by any other routes.
  • Warning vesicant—ensure vein is patent prior to administration, administer vesicant as per institutional policy and monitor for signs of extravasation throughout administration.
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Commence at least 6 hours prior to metHOTREXATe infusion and run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
metHOTREXATe 500 mg/m² intravenous 30 minutes
Instructions:

Neutrophils should be greater than 0.75 x 109/L and platelets greater than 75 x 109/L prior to commencing high dose metHOTREXATe.
metHOTREXATe 4500 mg/m² intravenous 23.5 hours
Instructions:

Continuous infusion over 23.5 hours, starting immediately after the 30 minute metHOTREXATe infusion (Total metHOTREXATe infusion must be completed within 24 hours).
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 2

Medication Dose Route Max duration Details
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
foliNIc acid (as calcium folinate) 15 mg/m² Every six hours intravenous 2 minutes
Instructions:
  • Starting 42 hours after start of metHOTREXATe infusion and continue to administer every 6 hours for a minimum 3 doses or until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • If metHOTREXATe elimination is impaired the dose of foliNIc acid will need to be increased. Consult prescribing information.
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 3

Medication Dose Route Max duration Details
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
foliNIc acid (as calcium folinate) 15 mg/m² Every six hours intravenous 2 minutes
Instructions:
  • Administer every 6 hours until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • If metHOTREXATe elimination is impaired the dose of foliNIc acid will need to be increased. Consult prescribing information.
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 4

Medication Dose Route Max duration Details
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • Administration may continue past Day 4 if metHOTREXATe level is still elevated.
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
  • Administration may continue past Day 4 if metHOTREXATe level is still elevated.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • Administration may continue past Day 4 if metHOTREXATe level is still elevated.
foliNIc acid (as calcium folinate) 15 mg/m² Every six hours intravenous 2 minutes
Instructions:
  • Administer every 6 hours until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • If metHOTREXATe elimination is impaired the dose of foliNIc acid will need to be increased. Consult prescribing information.
  • Administration may continue past Day 4 if metHOTREXATe level is still elevated.
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 5

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 6

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 7

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 8

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 9

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 10

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 11

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 12

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 13

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 14

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 15

Medication Dose Route Max duration Details
vinCRISTine * 1.5 mg/m² Cap dose per administration at: 2 mg intravenous 10 minutes
Instructions:
  • Diluted in a minibag.
  • FOR INTRAVENOUS USE ONLY – fatal if given by any other routes.
  • Warning vesicant—ensure vein is patent prior to administration, administer vesicant as per institutional policy and monitor for signs of extravasation throughout administration.
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Commence at least 6 hours prior to metHOTREXATe infusion and run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
metHOTREXATe 500 mg/m² intravenous 30 minutes
Instructions:

Neutrophils should be greater than 0.75 x 109/L and platelets greater than 75 x 109/L prior to commencing high dose metHOTREXATe.
metHOTREXATe 4500 mg/m² intravenous 23.5 hours
Instructions:

Continuous infusion over 23.5 hours, starting immediately after the 30 minute metHOTREXATe infusion (Total metHOTREXATe infusion must be completed within 24 hours).
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 16

Medication Dose Route Max duration Details
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
foliNIc acid (as calcium folinate) 15 mg/m² Every six hours intravenous 2 minutes
Instructions:
  • Starting 42 hours after start of metHOTREXATe infusion and continue to administer every 6 hours for a minimum 3 doses or until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • If metHOTREXATe elimination is impaired the dose of foliNIc acid will need to be increased. Consult prescribing information.
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 17

Medication Dose Route Max duration Details
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
foliNIc acid (as calcium folinate) 15 mg/m² Every six hours intravenous 2 minutes
Instructions:
  • Administer every 6 hours until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • If metHOTREXATe elimination is impaired the dose of foliNIc acid will need to be increased. Consult prescribing information.
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 18

Medication Dose Route Max duration Details
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • Administration may continue past Day 18 if metHOTREXATe level is still elevated.
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
  • Administration may continue past Day 18 if metHOTREXATe level is still elevated.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • Administration may continue past Day 18 if metHOTREXATe level is still elevated.
foliNIc acid (as calcium folinate) 15 mg/m² Every six hours intravenous 2 minutes
Instructions:
  • Administer every 6 hours until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • If metHOTREXATe elimination is impaired the dose of foliNIc acid will need to be increased. Consult prescribing information.
  • Administration may continue past Day 18 if metHOTREXATe level is still elevated.
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 19

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 20

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 21

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 22

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 23

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 24

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 25

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 26

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 27

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 28

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 29

Medication Dose Route Max duration Details
metHOTREXATe * 15 mg intrathecal injection
Instructions:
  • Adhere to local institution policy for intrathecal administration.
  • For Ommaya reservoir reduce dose to 6 mg intraventricularly.
  • Administer within 6 hours either side of high dose metHOTREXATe infusion. 
vinCRISTine * 1.5 mg/m² Cap dose per administration at: 2 mg intravenous 10 minutes
Instructions:
  • Diluted in a minibag.
  • FOR INTRAVENOUS USE ONLY – fatal if given by any other routes.
  • Warning vesicant—ensure vein is patent prior to administration, administer vesicant as per institutional policy and monitor for signs of extravasation throughout administration.
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Commence at least 6 hours prior to metHOTREXATe infusion and run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
metHOTREXATe 500 mg/m² intravenous 30 minutes
Instructions:

Neutrophils should be greater than 0.75 x 109/L and platelets greater than 75 x 109/L prior to commencing high dose metHOTREXATe.
metHOTREXATe 4500 mg/m² intravenous 23.5 hours
Instructions:

Continuous infusion over 23.5 hours, starting immediately after the 30 minute metHOTREXATe infusion (Total metHOTREXATe infusion must be completed within 24 hours).
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 30

Medication Dose Route Max duration Details
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
foliNIc acid (as calcium folinate) 15 mg/m² Every six hours intravenous 2 minutes
Instructions:
  • Starting 42 hours after start of metHOTREXATe infusion and continue to administer every 6 hours for a minimum 3 doses or until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • If metHOTREXATe elimination is impaired the dose of foliNIc acid will need to be increased. Consult prescribing information.
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 31

Medication Dose Route Max duration Details
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
foliNIc acid (as calcium folinate) 15 mg/m² Every six hours intravenous 2 minutes
Instructions:
  • Administer every 6 hours until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • If metHOTREXATe elimination is impaired the dose of foliNIc acid will need to be increased. Consult prescribing information.
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 32

Medication Dose Route Max duration Details
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • Administration may continue past Day 32 if metHOTREXATe level is still elevated.
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
  • Administration may continue past Day 32 if metHOTREXATe level is still elevated.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • Administration may continue past Day 32 if metHOTREXATe level is still elevated.
foliNIc acid (as calcium folinate) 15 mg/m² Every six hours intravenous 2 minutes
Instructions:
  • Administer every 6 hours until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • If metHOTREXATe elimination is impaired the dose of foliNIc acid will need to be increased. Consult prescribing information.
  • Administration may continue past Day 32 if metHOTREXATe level is still elevated.
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 33

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 34

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 35

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 36

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 37

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 38

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 39

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 40

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 41

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 42

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 43

Medication Dose Route Max duration Details
vinCRISTine * 1.5 mg/m² Cap dose per administration at: 2 mg intravenous 10 minutes
Instructions:
  • Diluted in a minibag.
  • FOR INTRAVENOUS USE ONLY – fatal if given by any other routes.
  • Warning vesicant—ensure vein is patent prior to administration, administer vesicant as per institutional policy and monitor for signs of extravasation throughout administration.
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Commence at least 6 hours prior to metHOTREXATe infusion and run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
metHOTREXATe 500 mg/m² intravenous 30 minutes
Instructions:

Neutrophils should be greater than 0.75 x 109/L and platelets greater than 75 x 109/L prior to commencing high dose metHOTREXATe.
metHOTREXATe 4500 mg/m² intravenous 23.5 hours
Instructions:

Continuous infusion over 23.5 hours, starting immediately after the 30 minute metHOTREXATe infusion (Total metHOTREXATe infusion must be completed within 24 hours).
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 44

Medication Dose Route Max duration Details
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
foliNIc acid (as calcium folinate) 15 mg/m² Every six hours intravenous 2 minutes
Instructions:
  • Starting 42 hours after start of metHOTREXATe infusion and continue to administer every 6 hours for a minimum 3 doses or until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • If metHOTREXATe elimination is impaired the dose of foliNIc acid will need to be increased. Consult prescribing information.
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 45

Medication Dose Route Max duration Details
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
foliNIc acid (as calcium folinate) 15 mg/m² Every six hours intravenous 2 minutes
Instructions:
  • Administer every 6 hours until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • If metHOTREXATe elimination is impaired the dose of foliNIc acid will need to be increased. Consult prescribing information.
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 46

Medication Dose Route Max duration Details
potassium chloride 20mmol/1000mL + sodium chloride 0.18% + glucose 4% 125 mL/m²/hour intravenous
Instructions:
  • To each 1000 mL bag admix 50 mmol sodium bicarbonate.
  • Or an alternative alkalinized intravenous infusion may be used as per institutional practice.
  • Run continuously until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • Administration may continue past Day 46 if metHOTREXATe level is still elevated.
sodium bicarbonate 50 mmol intravenous
Instructions:
  • Admix 50 mmol sodium bicarbonate to each 1000 mL bag of potassium chloride 20 mmol + sodium chloride 0.18% + glucose 4%.
  • Dose of sodium bicarbonate is approximately 6 mmol/m2/hour when admixed bag is infused at 125 mL/m2/hour.
  • Administration may continue past Day 46 if metHOTREXATe level is still elevated.
acetazolamide * 250 mg Four times daily oral administration
Instructions:

When required.

  • Administer immediately if urinary pH drops below 7.5 during metHOTREXATe infusion and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • Administration may continue past Day 46 if metHOTREXATe level is still elevated.
foliNIc acid (as calcium folinate) 15 mg/m² Every six hours intravenous 2 minutes
Instructions:
  • Administer every 6 hours until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1 µmol/L (level as per institutional practice).
  • If metHOTREXATe elimination is impaired the dose of foliNIc acid will need to be increased. Consult prescribing information.
  • Administration may continue past Day 46 if metHOTREXATe level is still elevated.
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 47

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 48

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 49

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 50

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 51

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 52

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 53

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 54

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 55

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Day: 56

Medication Dose Route Max duration Details
mercaptOPURine * 25 mg/m² Once daily oral administration
Instructions:
  • Take each dose on an empty stomach – one hour before OR three hours after food or milk.
  • Round dose to closest multiple of 25 mg.
  • Consider thiopurine methyltransferase (TPMT) testing and NUDT15 screening for specific patients 

Supportive Care Factors

Factor Value
Antifungal prophylaxis: Routine antifungal prophylaxis recommended
Antiviral prophylaxis for herpes virus: Routine antiviral prophylaxis recommended
Constipation risk: Consider prescribing laxatives with this treatment
Emetogenicity: Variable
Folinic acid rescue for high dose methotrexate: Mandatory
Hydration: Routine hydration recommended
Pneumocystis jirovecii pneumonia (PJP) prophylaxis: Routine antibiotic prophylaxis recommended

Antifungal prophylaxis: Inhibition of CYP3A4 by azole antifungals may lead to reduced vinCRISTine clearance and increased toxicities. Strategies to avoid this interaction may include a washout period after azole administration or using a non-azole antifungal for prophylaxis.


Antiviral prophylaxis for hepatitis B virus: Guidance is limited to high-risk anti-cancer medicines. Clinicians will need to assess individual patient risk for other anti-cancer medicines.


Emetogenicity:

  • MEDIUM days 1, 15, 29, 43, high dose metHOTREXATe may be highly emetogenic in certain patients.
  • MINIMAL to LOW (mercaptOPURine).

PJP prophylaxis: If trimethoprim + sulfamethoxazole is used as prophylaxis, it is recommended to withhold at least 48 hours prior to high dose metHOTREXATe administration and until serum metHOTREXATe level is less than 0.05 µmol/L – 0.1µmol/L (as per institutional practice).

 

References

No references

* The medicines, doses, combinations, and schedule in this treatment regimen have been carefully reviewed against international best practice guidelines by specialists in medical oncology around New Zealand and this advice has been accepted for publication by Te Aho o Te Kahu (the Cancer Control Agency). Sometimes medicines that are used in routine clinical practice have not been through a formal review process by the NZ Medicines Regulator Medsafe and are therefore considered unapproved or off-label. These medicines are legally able to be prescribed through sections 25 and 29 of the Medicines Act and by obtaining informed consent from patients. All treatment regimens listed on this website have been through robust peer review and are considered an accepted standard of care, whether prescribed through sections 25 or 29 or carrying formal Medsafe Approval.

s29: This symbol indicates that some formulations of the associated medicine are legally only able to be prescribed under section 29 of the Medicines Act. You can see which formulations are section 29 by hovering over the s29 symbol. You can access full medication details from the New Zealand Formulary by clicking on the medication name. Each clinician retains full responsibility for ensuring they have complied with all relevant obligations and requirements of section 29 including obtaining informed patient consent prior to prescribing the applicable medicine.