Azithromycin Dosage: Simple Guide for Adults and Kids

Azithromycin is a common antibiotic used for ear infections, strep throat, pneumonia, and a few other bugs. Getting the dose right matters – too little may not clear the infection, too much can raise the risk of stomach upset or heart rhythm changes. Below you’ll find the most common dosing schedules, when doctors might adjust them, and practical tips for taking the pill.

Standard Adult Dosing

For most infections, adults take a 500 mg tablet once a day for three days. Some doctors prescribe a single 1 g dose on the first day, followed by 500 mg on days two and three. The total course is usually three days, but longer treatments (up to five days) are used for lung infections or sexually transmitted diseases.

Key points to remember:

• Take the tablet with or without food – food does not affect absorption.
• Finish the full course even if you feel better after a day or two.
• If you miss a dose, take it as soon as you remember unless it’s close to the next scheduled dose; don’t double up.

People with liver problems may need a lower dose, and those taking certain heart‑risk medicines (like some anti‑arrhythmics) should have their doctor check the dosage because azithromycin can affect heart rhythm.

Kids and Special Situations

Children get a weight‑based dose, usually 10 mg per kilogram of body weight once a day for five days. For example, a 20‑kg child would take 200 mg daily. The medication comes as a liquid or chewable tablet, making it easier to swallow.

Special cases:

• Pregnant or breastfeeding moms should talk to their doctor – azithromycin is generally considered safe, but dosing may be tweaked.
• Patients with kidney impairment often keep the same adult dose, but doctors monitor them closely for side effects.
• If you have a history of heart rhythm problems, ask the doctor whether a different antibiotic might be safer.

Tips for taking the medicine:

• Shake the liquid formulation well before each dose.
• Use a proper measuring spoon or syringe – kitchen spoons aren’t accurate.
• Store leftover liquid in the fridge and discard it after the expiration date on the bottle.

Side effects are usually mild: occasional nausea, diarrhea, or a sore throat. Seek medical help if you notice severe stomach pain, a fast heartbeat, or a rash that spreads.

That’s the core of azithromycin dosing. Follow the schedule your prescriber gave you, watch for the warning signs, and you’ll give the infection the best chance to clear quickly. If anything feels off, a quick call to your pharmacy or doctor can clear up doubts without waiting for the next appointment.