Azithromycin (Z-Pack) is one of America's most prescribed antibiotics. This 2026 guide covers the Z-Pack dosage schedule, all FDA-approved uses including single-dose chlamydia treatment, the QT prolongation cardiac risk, a full azithromycin vs doxycycline comparison table, and 2026 resistance warnings for pneumonia and gonorrhoea.

Azithromycin and Doxycycline are both commonly prescribed for respiratory infections and STIs — but the 2021 CDC guidelines now prefer Doxycycline over Azithromycin for chlamydia, and Doxycycline is the only appropriate antibiotic for tick-borne diseases and acne. This complete comparison covers all 7 major indications, a full head-to-head table, and a clear guide on which to choose for your specific situation.

Learn about Azithromycin uses, dosage, side effects, warnings, and safety tips. Discover when this antibiotic is prescribed, how it works, and important precautions before use.