Erythromycin (erythromycin) — Uses, Dosage, Side Effects & Safety

Drug class: Macrolide antibiotic

Overview

Erythromycin is an antibiotic used to treat a wide range of bacterial infections, including respiratory tract infections, skin infections, and certain sexually transmitted infections. It is also sometimes used for people who are allergic to penicillin or when penicillin is not suitable. Erythromycin works by stopping the growth of bacteria. It does this by interfering with the bacteria's ability to make proteins, which are essential for their survival. This makes erythromycin effective against many types of bacteria, but it does not work for viral infections like the common cold or flu. Key points to know: Always take erythromycin exactly as prescribed, finish the full course even if you feel better, and let your doctor know if you experience any side effects or allergic reactions. Do not share this medication with others.

Therapeutic uses

  • Bacterial infections (respiratory tract, skin, soft tissue)
  • Chlamydia infections
  • Mycoplasma pneumoniae infections
  • Legionnaires' disease
  • Pertussis (whooping cough)

For related Erythromycin guidance, compare Clarithromycin and Roxithromycin.

Common side effects

  • Nausea
  • Vomiting
  • Diarrhea
  • Abdominal pain
  • QT prolongation
  • Hepatotoxicity
  • Allergic reactions

Frequently Asked Questions about Erythromycin

What infections does erythromycin treat?

Erythromycin is used to treat respiratory tract infections, skin infections, whooping cough, certain sexually transmitted infections, and other bacterial infections. It is also used for people allergic to penicillin.

Can I take erythromycin if I am pregnant or breastfeeding?

Erythromycin is generally considered safe in pregnancy and breastfeeding, but you should always consult your doctor before use.

What should I do if I develop diarrhea while taking erythromycin?

Mild diarrhea is common, but if you develop severe, persistent, or bloody diarrhea, contact your doctor immediately as this could be a sign of a serious intestinal condition.

Can erythromycin cause allergic reactions?

Yes, allergic reactions such as rash, itching, swelling, or difficulty breathing can occur. Seek immediate medical attention if you experience these symptoms.

How long does it take for erythromycin to work?

You may start to feel better within a few days, but it is important to complete the full course of treatment as prescribed.

Are there foods or drinks I should avoid while taking erythromycin?

Avoid alcohol and antacids containing aluminum or magnesium close to your dose. Otherwise, erythromycin can be taken with or without food.

What should I tell my doctor before starting erythromycin?

Inform your doctor about any allergies, liver or kidney problems, heart rhythm disorders, and all medications or supplements you are taking.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.