Overview

Many nonprescription and prescription medicines and supplements can cause gas and bloating. A few examples are:

• Aspirin.
• Antacids.
• Diarrhea medicines, such as Imodium, Kaopectate, and Lomotil.
• Opioid pain medicines.
• Fiber supplements and bulking agents, such as Citrucel, Fiberall, and Metamucil.
• Multivitamins and iron pills.

If you think that your gas, burping, or bloating may be caused by a medicine or supplement:

• Call the doctor who prescribed the medicine before you take the next dose to find out if you should stop taking the medicine or take a different one. An appointment may not be needed.
• If you are taking a medicine or supplement that was not prescribed by a doctor, stop taking it. Call your doctor if you feel that you need to continue taking the medicine or need help controlling your symptoms.