Each mL of the DURVET, INC. 002-DFV2302 Vitamin B Complex Solution contains Thiamine Hydrochloride (B1) 100 mg, Niacinamide 100 mg, Pyridoxine Hydrochloride (B6) 10 mg, d-Panthenol 10 mg, Riboflavin (B2) 5 mg, and Cyanocobalamin (B12) 100 mcg. It also includes complexed cobalt.