Folic Acid and Methotrexate: Drug Interaction Guide
Quick answer: Folic Acid and Methotrexate have a minor interaction — typically manageable with awareness.
How Folic Acid interacts with Methotrexate
Folic acid replenishes reduced folate pools depleted by low-dose methotrexate, decreasing mucosal, hepatic, and hematologic adverse effects.
What you should do
Use folic acid routinely with low-dose methotrexate according to the local regimen, commonly on a different day. Do not substitute it for folinic-acid rescue in high-dose methotrexate treatment.
Key facts
Severity
Minor — typically manageable
Mechanism
Folic acid replenishes reduced folate pools depleted by low-dose methotrexate, decreasing mucosal, hepatic, and hematolo...
Action
Use folic acid routinely with low-dose methotrexate according to the local regimen, commonly on a different day. Do not ...
Frequently asked questions
Can I take Folic Acid and Methotrexate together?
Usually yes, with awareness. Use folic acid routinely with low-dose methotrexate according to the local regimen, commonly on a different day. Do not substitute it for folinic-acid rescue in high-dose methotrexate treatment.
What is the severity of this interaction?
The interaction between Folic Acid and Methotrexate is classified as Minor — typically manageable. Folic acid replenishes reduced folate pools depleted by low-dose methotrexate, decreasing mucosal, hepatic, and hematologic adverse effects.
What should I do if I'm prescribed both?
Use folic acid routinely with low-dose methotrexate according to the local regimen, commonly on a different day. Do not substitute it for folinic-acid rescue in high-dose methotrexate treatment. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.