Applies to rifamycin: oral tablet delayed release.

Serious side effects of Rifamycin

Along with its needed effects, rifamycin may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking rifamycin:

Rare

• Fever
• stomach pain

Other side effects of Rifamycin

Some side effects of rifamycin may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common

• Belching
• constipation
• headache
• heartburn
• indigestion
• stomach discomfort or upset

For Healthcare Professionals

Applies to rifamycin: oral delayed release tablet.

General

The most commonly reported side effects included constipation, headache, and dyspepsia.^[Ref]

Gastrointestinal

Common (1% to 10%): Constipation

Uncommon (0.1% to 1%): Abdominal pain

Frequency not reported: Dyspepsia^[Ref]

Other

Uncommon (0.1% to 1%): Pyrexia^[Ref]

Nervous system

Common (1% to 10%): Headache^[Ref]