Rifamycin Side Effects

Medically reviewed by Drugs.com. Last updated on Dec 17, 2024.

Applies to rifamycin: oral tablet delayed release.

Precautions

It is very important that your doctor check your progress to see if the medicine is working properly and to check for unwanted effects.

Call your doctor if your diarrhea does not improve or if it gets worse within 48 hours.

Check with your doctor right away if you develop a fever or have blood in your stool.

Antibacterials, including rifamycin may also cause diarrhea, and in some cases it can be severe. It may occur 2 months or more after you stop using this medicine. Do not take any medicine to treat diarrhea without first checking with your doctor. Diarrhea medicines may make the diarrhea worse or make it last longer. If you have any questions about this or if mild diarrhea continues, or gets worse, check with your doctor.

You can become dehydrated if too much fluid is lost from the body with diarrhea. Make sure you drink plenty of fluids while you have diarrhea. Check with your doctor right away if you have more than one of the following symptoms: decreased urination, dizziness, dry mouth, increased thirst, or lightheadedness.

Common 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:

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:

For healthcare professionals

Applies to rifamycin: oral delayed release tablet.

General adverse events

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]

See also:

Further information

Rifamycin side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer