Azithromycin Dosage: What You Need to Know

Azithromycin is a popular antibiotic that doctors prescribe for ear infections, strep throat, pneumonia, and a few other bugs. Knowing the right dose helps the medicine work fast and reduces side effects. Below you’ll find the most common dosing schedules, what to do if you have special health needs, and tips to keep the treatment safe.

Standard Dosing for Common Infections

For most adult infections, the typical plan is a 500 mg dose on the first day, followed by 250 mg once a day for the next four days. This five‑day schedule is called a “single‑dose‑plus‑four‑day” regimen and covers the majority of respiratory and skin infections.

If you’re treating a simple ear infection or a mild throat infection, doctors sometimes prescribe a straight 250 mg daily dose for three days. The total amount of drug stays the same; it’s just spread out differently.

Kids get a weight‑based dose, usually 10 mg per kilogram of body weight on day 1, then 5 mg per kilogram once daily for the next four days. The exact numbers can vary, so always follow the pediatrician’s instructions.

For sexually transmitted infections like chlamydia, a single 1 g (1000 mg) dose is often enough. You take the whole pill at once and you’re done. No follow‑up doses are needed unless the doctor tells you otherwise.

Special Situations & Tips

People with liver problems may need a lower dose because azithromycin is processed in the liver. If you have chronic liver disease, your doctor might cut the dose by half or choose a different antibiotic.

Pregnant or breastfeeding moms should talk to their doctor before using azithromycin. While it’s generally considered safe, the doctor will weigh the benefits against any tiny risks.

Don’t skip a dose. If you miss a dose, take it as soon as you remember unless it’s almost time for your next dose. In that case, just skip the missed one—don’t double up.

Finish the full course even if you feel better after a couple of days. Stopping early can let the bacteria survive and become resistant, making future infections harder to treat.

Stay hydrated and take the pill with a glass of water. Food doesn’t usually affect absorption, but if you have an upset stomach, a light meal can help.

Watch for side effects like diarrhea, nausea, or a mild rash. Most are harmless and go away on their own. If you notice a severe reaction—such as trouble breathing, swelling of the face, or a high fever—call a doctor right away.

Finally, keep a list of all the medicines you’re taking. Azithromycin can interact with some drugs, especially certain heart medications. Sharing your medication list with your healthcare provider helps avoid dangerous combos.

Following these guidelines puts you on the fastest path to recovery while keeping the risks low. If you ever feel unsure about the dose or how long to stay on the drug, a quick phone call to your pharmacy or doctor can clear things up. Stay informed, stick to the plan, and you’ll be back to feeling good soon.