In the GI Tract
Sucralfate, some milk products, antacids, and oral iron preparations
Omeprazole, lansoprazole, H2-antagonists
Didanosine (given as a buffered tablet)
Cholestyramine
- Block absorption of quinolones, tetracycline, and azithromycin
- Reduce absorption of ketoconazole, delavirdine
- Reduces ketoconazole absorption
- Binds raloxifene, thyroid hormone, and digoxin