Vitamin B12

Also indexed as: Adenosylcobalamin, Cobalamin, Cyanocobalamin, Hydroxocobalamin, Hydroxycyanocobalamin, Methylcobalamin

Drug Interactions

Certain medicines interact with vitamin B12: Some interactions may increase the need for vitamin B12 (Beneficial), other interactions may be negative (Avoid) and indicate vitamin B12 should not be taken without first speaking with your physician or pharmacist, others may require further explanation (Check). Refer to the individual drug article for specific details about an interaction.

Note: The following list only includes the generic or class name of a medicine. To find a specific brand name, use the Medicines index.

Anticonvulsants Beneficial

Aspirin Beneficial

AZT Beneficial

Cimetidine Beneficial

Clofibrate Beneficial

Colchicine Beneficial

Cycloserine Beneficial

Erythromycin Beneficial

Famotidine Beneficial

Fenofibrate Beneficial

Gabapentin Beneficial

Gentamicin Beneficial

Isoniazid Beneficial

Lansoprazole Beneficial

Metformin Beneficial

Methyldopa Beneficial

Neomycin Beneficial

Nitrous Oxide Beneficial

Nizatidine Beneficial

Omeprazole Beneficial

Oral Contraceptives Beneficial

Phenobarbital Beneficial

Ranitidine Beneficial

Sulfamethoxazole Beneficial

Tetracycline Beneficial

Tricyclic Antidepressants Beneficial

Trimethoprim Beneficial

Valproic Acid Beneficial