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Azithromycin

Antibiotic
Often used for: Infections

About azithromycin

Azithromycin is an antibiotic. It works to kill bacteria that cause infections.

Azithromycin comes in different forms. The extended release form may require only one dose. Follow dosing instructions carefully.

Azithromycin dose changes may occur based on levels in the blood.

Azithromycin at home

  • Follow the dosing instructions carefully. Some forms may require only one dose (Zmax®).
  • Take Zmax® on an empty stomach. Other forms can be taken with or without food. Take with food if stomach upset occurs.
  • If vomiting occurs within 1 hour of taking azithromycin, call your doctor to see if another dose is needed.
  • Azithromycin packets: Mix powder in 1/4 cup water, and drink immediately. Add more water to the cup and drink to ensure the full dose.
  • Liquid azithromycin: Shake well, and use the measuring device that comes with the medicine.
  • Store azithromycin (oral forms) at room temperature.
  • Give a missed dose as soon as possible. If it is near the time of the next dose, skip the missed dose. Do not give 2 doses at the same time.
  • Do not use the medicine past the expiration date.
  • Follow instructions for safe storage and disposal.
May be taken as a tablet by mouth
May be taken as a liquid by mouth
May be given as a liquid into a vein by IV

Possible side effects

  • Nausea and vomiting
  • Diarrhea
  • Abdominal pain
  • Loss of appetite
  • Fatigue or weakness
  • Headache
  • Heartburn
  • Fast, pounding, or irregular heartbeat
  • Rash, itching
  • Dizziness
  • Sun sensitivity
  • Changes in liver function
  • Not all patients who take azithromycin will experience these side effects. Common side effects are in bold, but there may be others. Please report all suspected side effects to your doctor or pharmacist.

Tips for families

  • Be sure to discuss these and other recommendations with your doctor or pharmacist.
  • Let a doctor know if the patient has severe diarrhea while on this medicine.
  • Patients should protect their skin from the sun while taking this medicine.
  • While taking azithromycin, patients should not take antacids unless recommended by a doctor.
  • Finish all doses of the medicine as instructed by a doctor or pharmacist.