Active Ingredient

Clarithromycin

Clarithromycin is an antibiotic belonging to the macrolide class. It is commonly used to treat various bacterial infections.

This medication helps in managing infections of the respiratory tract, skin, and other areas of the body.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Clarithromycin Brands

Biaxin

Strengths 250mg, 500mg

Clarithromycin Uses

Clarithromycin is typically used to treat infections caused by bacteria. It is effective in several conditions:

Respiratory tract infections, such as bronchitis and pneumonia
Skin and soft tissue infections
Sinusitis
Ear infections
Helicobacter pylori infection, in combination with other medications

How Clarithromycin Works

Clarithromycin works by inhibiting the growth of bacteria. It does this by interfering with their protein synthesis, which is essential for bacterial growth and survival.

By blocking bacterial protein synthesis, it helps in reducing the infection and alleviating symptoms.

As a macrolide antibiotic, it specifically targets the ribosomal subunits in bacteria.

Common side effects of Clarithromycin

Not everyone experiences side effects from clarithromycin, and many of them are mild and temporary. Common side effects include:

Nausea
Diarrhea
Stomach pain
Headache
Altered taste sensation
Dizziness
Indigestion

If you experience serious or persistent symptoms, it is important to contact your doctor.

Take the medication as prescribed by your healthcare provider.
Avoid consuming large amounts of alcohol while taking this medication.
Inform your doctor about any other medications you are taking to avoid interactions.
Do not use clarithromycin if you have experienced allergic reactions to similar antibiotics.
Seek medical advice if you notice severe side effects or allergic reactions.

Always consult your doctor for personalized medical advice.

Frequently Asked Questions

What is clarithromycin used for?

Clarithromycin is used to treat various bacterial infections, including respiratory tract infections, skin infections, and more.

How quickly does clarithromycin work?

Clarithromycin may start to improve symptoms within a few days, but it is important to complete the full course as prescribed.

Can I drink alcohol while taking clarithromycin?

It is advisable to avoid large amounts of alcohol while taking clarithromycin, as it may increase the risk of side effects.

Are there any foods I should avoid while taking clarithromycin?

You can generally eat normally, but it is best to follow your healthcare provider’s advice regarding food interactions.

What should I do if I miss a dose of clarithromycin?

If you miss a dose, take it as soon as you remember. If it’s close to your next dose, skip the missed dose and continue with your regular schedule.