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