What are the uses for an antibiotic Z-Pak?

Doctors prescribe azithromycin, or Zithromax Z-Pak, for bacterial infections, including skin, ear and respiratory infections, according to Drugs.com. Z-Pak also treats some sexually transmitted diseases.

For treatment of mild pneumonia, pharyngitis, tonsillitis and skin infections, doctors generally prescribe a five-day therapy with Z-Pak, including a single 500-milligram dose on the first day followed by daily 250-milligram doses on the subsequent four days, reports Drugs.com. For bacterial infections caused by chronic obstructive pulmonary disease, the course of treatment generally involves taking 500 milligrams for three days. Doctors may recommend other treatment course schedules for acute bacterial sinusitis, genital ulcer disease and cervicitis, which are other conditions commonly treated using the drug.