|Brand name(s), other common name(s)||folinic acid|
|How the drug is given||Intravenously (IV) or by intramuscular (IM) injection|
Leucovorin is an FDA-approved drug similar to the vitamin folic acid. It protects healthy cells from the effects of methotrexate while allowing methotrexate to enter and kill cancer cells.
Levoleucovorin (Fusilev®) is a form of leucovorin that is given intravenously (IV).
Side effects needing medical attention:Allergic-like reactions; fatigue; weakness; nausea; vomiting; diarrhea; constipation; loss of appetite.