Some of the more common side effects of Z-Pak include upset stomach, abdominal pain, diarrhea and vomiting, warns WebMD. In rare instances, it can cause serious problems, including a fast or irregular heartbeat. Other side effects include muscular, hearing and vision problems.
When using Z-Pak, taking the medication with food helps reduce the chances of stomach upset in patients who experience this side effect. Patients should not take antacids containing magnesium or aluminum within two hours of taking the pill, advises WebMD.
Azithromycin is the active drug in Zithromax Z-Pak, and it is an antibiotic for the treatment of bacterial infections. Doctors prescribe it for respiratory infections, skin infections, ear infections and sexually transmitted diseases, according to Drugs.com. It carries a Federal Drug Administration category B, which means that pregnant women can take the medication without expecting it to harm the baby. However pregnant or breastfeeding women should consult with their doctors before using Z-Pak.
The medication in Z-Pak is in the form of a pill that the patient takes by mouth. In most cases, the prescription is for one pill per day. For the most effective results, the patient should take the pill at the same time each day to keep the level of antibiotics consistent in the body, as WebMD recommends. Patients should continue to take the medication until they complete the prescription to ensure that the bacteria does not continue to grow.