You may use over-the-counter antacids after meals and at bedtime, although they do not last very long.

Avoid using calcium supplements or antacids without your doctor's advice.

If you are pregnant, talk to your doctor before you use antacids.

Do not use antacids for more than 2 weeks unless you have talked with your doctor about taking them on a long-term basis.

If you have kidney problems, check with your doctor before using aluminum-based antacids.

Avoid using antacids without your doctor's advice while taking didanosine.

If you use antacids more than just once in a while, talk with your doctor.

Avoid using antacids within 1 hour before or 2 hours after you take atazanavir.

See the Medications section of this topic for more information on using antacids.

Avoid using antacids within 1 hour before or after taking cefixime.