Clarithromycin — Uses, Dosage, Side Effects & Safety

Drug class: Macrolide antibiotic

Overview

Clarithromycin is an antibiotic used to treat a wide range of bacterial infections, including respiratory tract infections (such as bronchitis and pneumonia), skin infections, and certain types of stomach ulcers caused by Helicobacter pylori. It is also used in combination with other medications to treat and prevent Mycobacterium avium complex (MAC) infections in people with HIV/AIDS. Clarithromycin works by stopping the growth of bacteria. It belongs to the macrolide class of antibiotics, which inhibit bacterial protein synthesis. This medication will not work for viral infections such as the common cold or flu. Key points for patients: Always complete the full course of clarithromycin as prescribed, even if you feel better. Stopping early may allow bacteria to continue to grow, which can result in a return of the infection. Take clarithromycin exactly as directed by your healthcare provider.

Therapeutic uses

• Bacterial infections
• Respiratory infections
• Skin infections

For related Clarithromycin guidance, compare Erythromycin, Roxithromycin and Osteoporosis: A Comprehensive Guide to Causes, Symptoms, and Treatment.

Common side effects

• Diarrhea
• Nausea
• Abdominal pain
• Taste disturbance
• Headache
• QT prolongation
• Hepatotoxicity
• Clostridium difficile-associated diarrhea

Frequently Asked Questions about Clarithromycin

What infections does clarithromycin treat?

Clarithromycin is used to treat respiratory tract infections (such as bronchitis, pneumonia), skin infections, sinusitis, pharyngitis, and to eradicate Helicobacter pylori in combination therapy. It is also used for Mycobacterium avium complex (MAC) infections.

Can I take clarithromycin if I am pregnant or breastfeeding?

Clarithromycin is generally not recommended during pregnancy unless clearly needed. It passes into breast milk, so consult your doctor before breastfeeding.

How quickly does clarithromycin start working?

Most people begin to feel better within a few days of starting clarithromycin, but it is important to complete the full course as prescribed.

Can clarithromycin cause diarrhea?

Yes, diarrhea is a common side effect. However, if you experience severe or persistent diarrhea, contact your doctor as it may indicate a more serious intestinal condition.

What should I do if I develop a rash while taking clarithromycin?

Stop taking the medication and contact your healthcare provider immediately, as a rash may be a sign of an allergic reaction.

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

Avoid alcohol and grapefruit juice, as they may increase the risk of side effects. Take extended-release tablets with food.

Can clarithromycin interact with other medications?

Yes, clarithromycin interacts with many medications, including statins, warfarin, and some heart rhythm drugs. Always inform your doctor of all medicines you are taking.

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