Each film-coated tablet contains Thiamine Mononitrate (Vitamin B1) 500 mg, Pyridoxine Hydrochloride (Vitamin B6) 250 mg, Cyanocobalamin (Vitamin B12) 1 mg. BYDEN 500 is a combination of the 3 essential neurotropic vitamins B1, B6 and B12 in high dosage. Vitamin B1, B6 and B12 are of special importance for the metabolism in the peripheral and central nervous system. Their effect on the regeneration of nerves has been shown in various investigations using the vitamins individually and in combination. Vitamin B1, B6 and B12 (BYDEN 500) is a pink film-coated tablet, oval, biconvex, plain on one side, bisected on the other side.