Generic name: Clarithromycin.

Biaxin is a macrolide antibiotic. It works by killing bacteria directly or slowing the growth of bacteria so that the body’s natural defenses can kill them. 

Quick Facts About Biaxin


Used to treat bacterial infections of the respiratory tract, including: pneumonia, sinusitis, skin infections, strep throat, and tonsillitis. Also prescribed for acute otitis media, prevention of certain infections in HIV patients, and to treat community-acquire: pneumonia in children. In addition, used to trea: some types of duodenal ulcer.

Biaxin Dosage

May take with or without food; take exactly as prescribed. Finish the entire treatment course.

  • Usual adult dose: 250 to 500 milligrams every II hours for 7 to 14 days, depending on the type c# infection and bacteria. Lower dosage may be required for kidney disease.
  • Usual child dose: not generally prescribed for children under 12 years.
  • Missed dose: take as soon as possible, unless almost time for next dose. In that case, take the next dose 5 to 6 hours later, then go back to regular schedule.

Biaxin Side Effects

Overdose symptoms:

no specific information regarding overdose. If you suspect an overdose, immediately seek medical attention.

More common side effects: abdominal pain and/or discomfort, altered sense of taste, diarrhea, headache, indigestion, nausea.

No known less common or rare Biaxin side effects.


Inform your doctor before combining Biaxin with:

Carbamazepine (Tegretol) or Theophylline (Slo-Phyllin, Theo-Dur, others). Biaxin is in the same family of drugs as Erythromycin. Medications that interact with Erythromycin include: Astemizole (Hismanal); blood thinners such as Coumadin; Cyclosporine (Sandimmune); Digoxin (Lanoxin); Ergotamine (Caftergot); Hexobarbital; Phenytoin (Dilantin); Terfenadine (Seldane); Triazolam (Halcion).

No known food/other substance interactions. 

Special Cautions

If pregnant or planning to become pregnant, inform your doctor immediately. May appear in breast milk; could affect a nursing infant. May produce birth defects.

No special precautions apply to seniors.

Not generally prescribed for children.

  • Do not use if sensitive to or allergic to this medication or similar antibiotics such as Tao or Zithromax. May cause pseudomembranous colitis, a potentially life-threatening diarrhea. Stop taking Biaxin and inform your doctor if you have prolonged or severe diarrhea.

Note: provides accurate and independent information prescription pills, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. If you have questions about  dosage, or Biaxin side effects, please contact your healthcare provider.