To decrease the risk of severe adverse reactions [see Warnings and Precautions (5)]:
Refer to the leucovorin prescribing information for additional information.
Methotrexate Injection is used as part of a multi-drug regimen. The recommended dosage varies from 10 to 5000 mg/m2 intravenously. For high-dose Methotrexate Injection regimens, use leucovorin rescue in accordance with high-dose methotrexate regimen guidelines [see Dosage and Administration (2.2)]. Lower doses (e.g., 20 to 30 mg/m2 per week) may be used intramuscularly. Individualize the dose and schedule of Methotrexate Injection based on disease state, patient risk category, concurrent drugs used, phase of treatment, and response to treatment.
Use only preservative-free Methotrexate Injection for intrathecal use.
Prior to administration, dilute preservative-free Methotrexate Injection to a concentration of 1 mg/mL in preservative-free 0.9% Sodium Chloride Injection, USP.
The recommended intrathecal dose of Methotrexate Injection (preservative-free) is based on age:
For treatment of meningeal leukemia, intrathecal methotrexate may be given at intervals of 2 or more days up to twice weekly; however, administration at intervals of less than 1 week may result in increased subacute toxicity. For meningeal leukemia prophylaxis, Methotrexate Injection is administered no more than once weekly.
For patients with Down Syndrome, administer leucovorin rescue with intrathecal Methotrexate Injection.
The recommended dosage of Methotrexate Injection varies. When used in combination, recommended dosages range from 10 mg/m2 to 8000 mg/m2 intravenously. When used as a single agent, recommended dosages include 8000 mg/m2 intravenously for central nervous system-directed therapy or 5 to 75 mg intravenously for cutaneous forms of non-Hodgkin lymphoma.
As part of a combination chemotherapy regimen, a recommended dosage of Methotrexate Injection is 1000 mg/m2 or 3000 mg/m2 as an intravenous infusion over 24 hours followed by leucovorin rescue in accordance with high-dose methotrexate regimen guidelines [see Dosage and Administration (2.2)].
For central nervous system-directed therapy, a recommended dosage of Methotrexate Injection is 8000 mg/m2 as an intravenous infusion over 4 hours as a single agent or in combination with immunochemotherapy at doses ranging from 3000 mg/m2 to 8000 mg/m2 followed by leucovorin rescue in accordance with high-dose methotrexate regimen guidelines [see Dosage and Administration (2.2)].
For intrathecal Methotrexate Injection (preservative-free), the recommended dose is based on age [see Dosage and Administration (2.4)]. The frequency of administration varies based on whether it is being used for treatment or prophylaxis, and other factors.
The recommended dosage of Methotrexate Injection is typically 12 g/m2 (maximum 20 g/dose) as an intravenous infusion over 4 hours administered as a component of a combination chemotherapy regimen. Administer leucovorin rescue in accordance with high-dose methotrexate regimen guidelines [see Dosage and Administration (2.2)]. Subsequent doses may need to be adjusted based on observed peak serum methotrexate concentrations. Dosage and schedule may vary based upon factors such as patient comorbidities, disease state, and prior treatments.
A recommended dosage of Methotrexate Injection is 40 mg/m2 intravenously as a component of a cyclophosphamide- and fluorouracil-based multi-drug regimen.
The recommended dosage of Methotrexate Injection ranges from 40 to 60 mg/m2 intravenously once weekly.
For patients with low-risk gestational trophoblastic neoplasia (GTN) a recommended dosage for Methotrexate Injection is 30 mg/m2 to 200 mg/m2 or 0.4 mg/kg to1 mg/kg intravenously or intramuscularly.
For patients with high-risk GTN, a recommended dosage for Methotrexate Injection is 300 mg/m2 over 12 hours as an intravenous infusion as a component of a multi-drug regimen.
The recommended starting dosage of Methotrexate Injection is 7.5 mg once weekly, administered intramuscularly with escalation to achieve optimal response. Dosages of more than 20 mg once weekly result in an increased risk of serious adverse reactions, including myelosuppression.
When responses are observed, the majority occurred between 3 and 6 weeks from initiation of treatment; however, responses have occurred up to 12 weeks after treatment initiation.
Administer folic acid or folinic acid to reduce the risk of methotrexate adverse reactions [see Warnings and Precautions (5.12)].
The recommended starting dosage of Methotrexate Injection is 10 mg/m2 once weekly administered subcutaneously or intramuscularly, with escalation to achieve optimal response. Dosages over 30 mg/m2 per week may result in an increased risk of serious adverse reactions, including myelosuppression. When responses are observed, the majority occurred between 3 and 6 weeks from initiation of treatment; however, responses have occurred up to 12 weeks after treatment initiation.
Administer folic acid or folinic acid to reduce the risk of methotrexate adverse reactions [see Warnings and Precautions (5.12)].
The recommended dosage of Methotrexate Injection is 10 mg to 25 mg intramuscularly or intravenously once weekly until adequate response is achieved.
Adjust the dose gradually to achieve optimal clinical response; do not exceed 25 mg per week. Once optimal clinical response has been achieved, reduce the dosage to the lowest possible dosing regimen.
Administer folic acid or folinic acid to reduce the risk of methotrexate adverse reactions [see Warnings and Precautions (5.12)].
Discontinue Methotrexate Injection for:
Withhold, dose reduce or discontinue Methotrexate Injection as appropriate for:
Withhold or discontinue Methotrexate Injection as appropriate for:
Methotrexate Injection is a hazardous drug. Follow applicable special handling and disposable procedures.1
With Preservative (Multiple-Dose Vial)
Preservative-Free (Single-Dose Vial)
Methotrexate Injection preservative-free may be administered by intramuscular, intravenous, subcutaneous, or intrathecal injection.
| This Patient Information has been approved by the U.S. Food and Drug Administration. Issued: 05/2025 | ||||||
Patient Information | ||||||
What is the most important information I should know about Methotrexate Injection?
Males with female partners who are able to become pregnant:
Severe allergic reactions. Severe allergic reactions can happen with Methotrexate Injection.
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Decreased blood cell counts. Methotrexate Injection can affect your bone marrow and cause decreased red blood cell counts, white blood cell counts, and platelet counts, and a condition where your bone marrow cannot produce these blood cells (aplastic anemia). These decreased blood cell counts can be severe and may lead to a serious infection, the need for blood transfusions, treatment in a hospital, and can be life-threatening. Your healthcare provider will check your blood cell counts before you start and during treatment with Methotrexate Injection. Your healthcare provider will watch you closely for infections during treatment with Methotrexate Injection. | ||||||
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Your healthcare provider may give you medicines to support your blood counts or give you transfusions if needed, and change your dose or stop your treatment with Methotrexate Injection if needed. | ||||||
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Your healthcare provider will closely watch you for signs and symptoms of infection during treatment with Methotrexate Injection. Your healthcare provider may hold or stop your treatment with Methotrexate Injection if you develop a serious infection.
Tell your healthcare provider if you develop any signs or symptoms of liver problems during treatment with Methotrexate Injection, including: | ||||||
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Brain and spinal cord (nervous system) problems. Methotrexate Injection can cause nervous system problems that can be severe and last for a short time or last for a long time. These nervous system problems can get progressively worse, may not get better (possibly irreversible), and can cause death.
Call your healthcare provider right away if you or your child develop any new signs or symptoms of a nervous system problem during treatment with Methotrexate Injection, including: | ||||||
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Severe stomach and intestine (gastrointestinal) problems.
Call your healthcare provider right away if you develop: | ||||||
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Lung problems. Lung problems can happen suddenly (acute) with Methotrexate Injection or they can develop over a long period-of-time (chronic). Lung problems may not get better (possibly irreversible) and can cause death in anyone taking Methotrexate Injection. Your healthcare provider will monitor you for lung problems during treatment with Methotrexate Injection. Your healthcare provider may hold or stop your treatment with Methotrexate Injection, if needed.
Limit sunlight exposure during treatment with Methotrexate Injection. Use a broad-spectrum ultraviolet sunscreen and lip balm with a Sun Protection Factor (SPF) of 30 or greater and wear a hat and protective clothing when you will be exposed to sunlight during treatment with Methotrexate Injection. Call your healthcare provider right away if you develop a new or worsening skin rash during treatment with Methotrexate Injection. See “What are the possible side effects of Methotrexate Injection?” for more information about side effects. | ||||||
What is Methotrexate Injection?
in adults:
Methotrexate Injection is a prescription medicine used:
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Do not receive Methotrexate Injection if you:
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Before you receive Methotrexate Injection, tell your healthcare provider about all of your medical conditions, including if you:
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Taking certain medicines can affect the amount of methotrexate in your blood and can increase your risk for serious side effects. | ||||||
How will I receive or take Methotrexate Injection?
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If you are receiving Methotrexate Injection to treat your cancer:
If you are receiving Methotrexate Injection for treatment of severe psoriasis, rheumatoid arthritis, or polyarticular juvenile idiopathic arthritis:
In all patients receiving Methotrexate Injection:
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What are the possible side effects of Methotrexate Injection?
The most common side effects of Methotrexate Injection include:
Possible fertility problems (infertility) in males and females. Methotrexate Injection can cause fertility problems in males and females, and cause sperm production to stop in males, and menstrual problems in females. In females, your periods (menstrual cycle) may be irregular or completely stop when you receive Methotrexate Injection. Your periods may or may not return to normal following treatment. It is not known if your fertility will return after treatment. Talk to your healthcare provider about your risk for infertility if this is a concern for you. | ||||||
General information about the safe and effective use of Methotrexate Injection. | ||||||
What are the ingredients in Methotrexate Injection? For more information, go to www.pfizer.com or call 1-800-438-1985. | ||||||
Additional Resources
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