Answer
Absorption of cyanocobalamin tablets may be reduced by para-aminosalicylic acid, colchinine, biguanides, neomycin, cholestyramine, potassium chloride, methyldopa and cimetidine.
Sources for this answer
- Cyanocobalamin 50 micrograms Film-coated TabletsGlenmark Pharmaceuticals Europe Ltd · emc · SmPC §4.5 Interaction with other medicinal products · Version 2Document updated
Sources checked