L-methylfolate calcium is a drug used in the treatment of folic acid deficiency. Also known by the name levomefolic acid, L-methylfolate calcium is the biologically active form of folic acid and is therefore used in the growth and replication of cells.
Folic acid is essential, for example, in pregnant women who may develop folate deficiency, something that can cause neural tube defects in the developing fetus. L-methylfolate is, however, mostly used to treat vitamin B12 deficiency - something which is invariably linked to folate.
L-methylfolate calcium has numerous clinically significant drug interactions and should not be taken without appropriate clinical supervision. The drug is well tolerated, though some patients have reported experiencing allergic symptoms.