SPL Set ID: d8bdd60c-9a1c-4ef4-ba6b-b911849128f1

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.=511.5 Leucovorin Calcium for Injection, USP is a sterile product indicated for intramuscular (IM) or intravenous (IV) administration and is supplied in 50 mg, 100 mg, 200 mg, 350 mg, and 500 mg vials. Each 50 mg vial of Leucovorin Calcium for Injection, USP, when reconstituted with 5 mL of sterile diluent, contains leucovorin (as the calcium salt) 10 mg/mL. Each 100 mg vial of Leucovorin Calcium for Injection, USP, when reconstituted with 10 mL of sterile diluent, contains leucovorin (as the calcium salt) 10 mg/mL. Each 200 mg vial of Leucovorin Calcium for Injection, USP, when reconstituted with 20 mL of sterile diluent, contains leucovorin (as the calcium salt) 10 mg/mL. Each 350 mg vial of Leucovorin Calcium for Injection, USP, when reconstituted with 17.5 mL of sterile diluent, contains leucovorin (as the calcium salt) 20 mg/mL. Each 500 mg vial of Leucovorin Calcium for Injection, USP, 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, USP, added to adjust tonicity. The inactive ingredient is sodium chloride 40 mg/vial for the 50 mg vial, 80 mg/vial for the 100 mg vial, 80 mg/vial for the 200 mg vial, 140 mg/vial for the 350 mg vial, and 450 mg/vial for the 500 mg vial. Sodium hydroxide and/or hydrochloric acid are used to adjust the pH to approximately 8.1 during manufacture. Reconstitute with Bacteriostatic Water for Injection, USP, which contains benzyl alcohol (see WARNINGS section), or with Sterile Water for Injection, USP. structural formula