Sign Out
Chloramphenicol: Limited case reports suggest that chloramphenicol can delay or interrupt the reticulocyte response to supplemental Vitamin B12 in some patients. Monitor blood levels carefully if the combination cannot be avoided.
Absorption: The following medicines can reduce the absorption of Vitamin B12: aminosalicylic acid, antibiotics, colchicine, cholestyramine, H2 blockers, metformin, neomycin, nitrous oxide, oral contraceptives, phenytoin, phenobarbital, primidone, proton pump inhibitor, zidovudine.
