Trusted, medically reviewed health information • Not a substitute for medical advice
Medically Verified MonographRxClass: Macrolide Antibiotic

Azithromycin

Generic Name: Azithromycin

Common Brand Names: Zithromax
Dosage Form:Tablet
Route:Oral
Pregnancy Category:B
Last Reviewed:9/6/2026

Seek Urgent Medical Attention If:

Sudden syncope, palpitations, rapid irregular heart rhythm, hives with swelling of the throat.

Uses & Medical Indications

Treat bacterial infections

Medical Conditions Treated:

Respiratory infections, skin infections, chlamydia

Dosage & Administration Guidelines

Adult Dosage

500 mg day 1, then 250 mg days 2-5

Pediatric Dosage

10 mg/kg day 1, then 5 mg/kg days 2-5

Elderly / Geriatric Considerations

Caution for QT prolongation

Maximum Dose Limit

varies by indication

Renal Impairment:

Caution in severe impairment

Hepatic Impairment:

Caution in severe impairment

Side Effects & Safety Warnings

Common Side Effects

Diarrhea, nausea, abdominal pain

Serious Adverse Reactions

QT prolongation, hepatotoxicity

Contraindications:

History of cholestatic jaundice with prior use

Important Warnings & Precautions:

Risk of QT prolongation

Interactions (Drugs, Food & Alcohol)

Drug-Drug Interactions:

Antacids, Warfarin

Food & Dietary Interactions:

N/A

Alcohol Interaction Warning:

N/A

Pregnancy & Breastfeeding Safety

Pregnancy Safety

Generally safe

Breastfeeding / Lactation

Compatible

Patient Counseling & Practical Advice

How to Take:

Take with or without food

What to Do if You Miss a Dose:

Take as soon as remembered

Recommended Monitoring & Lab Tests:

Resolution of infection

Frequently Asked Questions

Trustworthy Sources & Medical Review

Content for Azithromycin was synthesized and fact-checked against standardized regulatory monographs, official pharmacopoeias, and national health authorities:

  • US FDAFDA Drug Safety Communication: Azithromycin and Risk of Fatal Heart Rhythms
  • Infectious Diseases Society of America (IDSA)Clinical Practice Guidelines for Community-Acquired Pneumonia
Reviewer Credentials: PharmD, Clinical PharmacologistLast Reviewed Date: 9/6/2026

The information provided on this website is for educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition.