* Antibiotics, such as tetracyclines or quinolones (Levaquin, Cipro)
* Antifungals, such as itraconazole (Sporanox
* Digoxin (Lanoxin), a medication used to treat congestive heart failure
* Iron supplements
To reduce or prevent drug interactions with antacids, it is generally recommended that you take antacids at least one hour before or two hours after other medications.