About azithromycin
Macrolide antibiotic
Used for
- Treats certain bacterial infections, including respiratory, skin, and some sexually transmitted infections.
Usual adult dose
Often 500 mg on day one, then 250 mg daily for four days; regimens vary by infection.
Usual dose in children
For selected infections, commonly 10 mg/kg on day one, then 5 mg/kg daily for four days; maximums vary.
Common side effects
- Nausea, diarrhea, abdominal pain, or vomiting
- Headache
- Rarely, severe allergic reactions or liver problems
Important warnings
- Does not treat viral infections such as colds or flu.
- May prolong the heart rhythm (QT interval), rarely causing dangerous arrhythmias.
- Seek urgent care for severe diarrhea, jaundice, or allergic reaction.
Pregnancy
May be used when needed, but suitability depends on the infection and available alternatives.
Breastfeeding
Generally considered compatible; monitor the infant for diarrhea, vomiting, or rash.
Interactions
- Warfarin: may increase bleeding risk; monitoring may be needed.
- Some medicines that prolong the QT interval increase heart rhythm risks.
- Antacids containing aluminum or magnesium can affect absorption; separate doses.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.