Pharmacology: Pharmacokinetics: Oral drops: Thiamine Hydrochloride (Vitamin B1), Riboflavin (Vitamin B2), Niacinamide (Vitamin B3), Pyridoxine Hydrochloride (Vitamin B6), Cyanocobalamin (Vitamin B12) are readily absorbed from the gastrointestinal tract following oral administration. Vitamins B1, B2 and B3 are widely distributed in the body tissues. Vitamins B1, B2, B3 and B12, appear in breast milk. Vitamin B6 and B12 are stored in the liver. Vitamins B1, B2 and B6 are excreted in the urine. Vitamin B12 is excreted in the bile, part of the administered dose is excreted in the urine.