SPL Set ID: e3b957dc-a542-4f69-b8a0-7df401ee706f

Leucovorin is one of several active, chemically reduced derivatives of folic acid. It is useful as an antidote to drugs which act as folic acid antagonists. Also known as folinic acid, Citrovorum factor, or 5-formyl-5,6,7,8-tetrahydrofolic acid, this compound has the chemical designation of Calcium N -[ p -[[[(6 RS )-2-amino-5-formyl-5,6,7,8-tetrahydro-4-hydroxy-6-pteridinyl]methyl]amino]benzoyl]-L-glutamate (1:1). The structural formula of leucovorin calcium is: C 20 H 21 CaN 7 O 7 M.W. 511.51 Leucovorin Calcium for Injection is a sterile product indicated for intramuscular (IM) or intravenous (IV) administration and is supplied in 200 mg and 500 mg vials. Each 200 mg vial of Leucovorin Calcium for Injection, when reconstituted with 20 mL of sterile diluent, contains leucovorin (as the calcium salt) 10 mg/mL. Each 500 mg vial of Leucovorin Calcium for Injection, when reconstituted with 50 mL of sterile diluent, contains leucovorin (as the calcium salt) 10 mg/mL. In each dosage form, one milligram of leucovorin calcium contains 0.002 mmol of leucovorin and 0.002 mmol of calcium. These lyophilized products contain no preservative. The inactive ingredient is sodium chloride added to adjust tonicity. Reconstitute with Bacteriostatic Water for Injection, USP, which contains benzyl alcohol (see WARNINGS ), or with Sterile Water for Injection, USP. The inactive ingredient is sodium chloride 180 mg/vial for the 200 mg and 450 mg/vial for the 500 mg. Sodium hydroxide and/or hydrochloric acid may be added for pH adjustment. pH adjusted to approximately 7.8. There is 0.004 mEq of calcium per mg of leucovorin. Solution contains no bacteriostat or antimicrobial agents. structure