Zithromax, also known as Azithromycin, is an antibiotic used to combat various bacterial infections. It operates by preventing bacteria from growing by interfering with protein synthesis. Zithromax is commonly used to treat respiratory infections, skin infections, middle ear infections, and sexually transmitted diseases. However, it is ineffective against viral infections such as the flu or a common cold. Possible side effects include nausea, vomiting, diarrhea, stomach discomfort, or altered taste. Serious allergic reactions to this drug are rare but seek immediate medical attention if they occur. Overuse or misuse can lead to decreased effectiveness.