Vitamin C slows the excretion and enhances the effect and side effects of sulfonamides, slows the excretion of barbiturates, salicylates.
Laxative drugs, which include mineral oil, and colestramine reduce the absorption of vitamins A, D and E.
Fluorouracil, vinblastine, bleomycin, cisplatin violate the assimilation of vitamins A, B1, B6, penicillamine, isoniazid reduce the effectiveness of the vitamin B1, increasing its excretion.
Isoniazid reduces the effectiveness of pyridoxine.
Sana-Sol®-Multivitamin Complex should not be taken concomitantly with other drugs containing vitamin A or D, in order to avoid an overdose.