what does zpack work for
A senior woman is holding a bottle of pills in her hand. Photo Credit Jack Hollingsworth/Photodisc/Getty Images. A Z-Pak is a prepackaged form of the antibiotic azithromycin, sold under the brand name Zithromax. Like other antibiotics, a Z-Pak treats bacterial infections.Zithromax will not cure or shorten the duration of a viral infection. You should never take antibiotics prescribed for another person, and take a Z-Pak only if your doctor recommends it.zithromycin, like other antibiotics, can have side effects including allergic reactions, diarrhea, nausea or abdominal pain. Zithromax has also been associated with a small increase in the risk of cardiovascular death in some patients, the Food and Drug Administration warns.