Drug-induced vitamin deficiencies
| Vitamin depletion | Causative medications |
|---|---|
| Lipid-soluble | |
| Vitamin A | Orlistat, cholestyramine |
| Vitamin D | Corticosteroids, antiepileptic drugs, orlistat, cholestyramine |
| Vitamin K | Antibiotics, orlistat, cholestyramine |
| Water-soluble | |
| Vitamin B1 | Furosemide, fluorouracil |
| Vitamin B3 | Isoniazid, pyrazinamide |
| Vitamin B6 | Isoniazid, cycloserine, antiepileptic drugs, levodopa, theophylline |
| Vitamin B7 | Antiepileptic drugs, lipoic acid |
| Vitamin B9 | Methotrexate, sulfonamides, antiepileptic drugs |
| Vitamin B12 | Acid-suppressive agents (proton pump inhibitors, H2-receptor antagonists), metformin, colchicine |