Online Zithromax (Azithromycin)
Antibiotics • Educational only; not medical advice. Prescriptions at clinician discretion.
Overview
Azithromycin, known as Zithromax or the “Z-Pak,” is a macrolide antibiotic derived from erythromycin. It inhibits bacterial protein synthesis by binding to the 50S ribosomal subunit, halting bacterial growth. Its long tissue half-life allows short-course treatments.
Uses
Effective against respiratory infections, sinusitis, otitis media, skin infections, and sexually transmitted infections like chlamydia. Also used for traveler’s diarrhea and atypical pneumonia caused by Mycoplasma and Chlamydophila.Dosage & Administration
Typical regimen: 500 mg on day 1, followed by 250 mg daily for 4 days. For STIs: 1 g single dose. Take on an empty stomach 1 hour before or 2 hours after meals.Side Effects & Warnings
Common: diarrhea, abdominal pain, and nausea. Rare: liver dysfunction, QT prolongation, and allergic reactions. Avoid combining with antiarrhythmics or other QT-prolonging drugs.Patient Considerations
Complete the prescribed course even if symptoms improve. Avoid antacids containing aluminum or magnesium near dosing.Ready for next steps?
Frequently asked questions
Why is Zithromax called a “Z-Pak”?
Because it’s usually dispensed in a five-day prepackaged course shaped like a “Z.”
Can Zithromax treat viral infections?
No, it targets bacteria only.
Is one dose enough for chlamydia?
Yes, a single 1 g dose is standard for uncomplicated infections.
Government / NIH sources
Top Products
Meet our doctors
Licensed clinicians with evidence‑based prescribing. Learn about training, interests, and availability.