Azithromycin (Azithral): uses, dose & side effects
Written & medically reviewed by Dr. Sanjay Anbu, MBBS· Last reviewed
Azithromycin is a widely used antibiotic, popular because many infections need only a short 3–5 day course. It treats certain bacterial chest, throat, sinus and skin infections — not viral ones.
Typical dose — general reference only, NOT a prescription
Measure
Range
Category
Prescription
Adult dose
500 mg once daily for 3 days, or 500 mg on day 1 then 250 mg on days 2–5
Child (paediatric) dose
10 mg/kg once daily for 3 days (or 10 mg/kg day 1 then 5 mg/kg days 2–5)
What it is used for
Chest, throat and sinus infections
Some skin and ear infections
Certain sexually transmitted infections
Sometimes used in typhoid
Common brand names
India: Azithral, Azee, Zithrox, Aziwok
Worldwide: Zithromax, Z-Pak, Azasite
Common side effects
Nausea, diarrhoea or tummy pain
Headache
Temporary taste changes
Before taking it — precautions
Tell your doctor about heart-rhythm problems
Mention liver disease and other medicines
Complete the course
When to see a doctor urgently
Palpitations, fainting or irregular heartbeat
Yellow eyes (liver)
Severe allergy or diarrhoea
Doses are a general reference, not a prescription. Doses shown are typical adult/paediatric references and vary with age, weight, kidney/liver function and the exact product. Paediatric doses are usually weight-based and must be set by a doctor. MedDroid cannot prescribe — always confirm azithromycin and your dose with a doctor or pharmacist and the leaflet inside the pack.
Frequently asked questions
Why is azithromycin only a 3 or 5 day course?
It stays active in the body for days after the last dose, so a short course keeps working. Take it exactly as prescribed.
Is azithromycin good for a cough or cold?
No — those are usually viral, and antibiotics do not help. It is only for bacterial infections.
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.