Zithrin 500 mg is an antibiotic medication containing Azithromycin, a macrolide antibiotic, manufactured by Renata Limited. It is used to treat a wide range of bacterial infections by inhibiting the growth of bacteria. Zithrin 500 mg is commonly prescribed for respiratory tract infections, including pneumonia, bronchitis, and sinusitis. It is also effective for skin and soft tissue infections, otitis media (middle ear infections), and certain sexually transmitted diseases like chlamydia. This medication works by binding to bacterial ribosomes, preventing protein synthesis, which halts bacterial growth. Zithrin is often dosed as 500 mg once a day for a short course, typically lasting 3 to 5 days, depending on the condition. While it is well-tolerated, common side effects include gastrointestinal issues like nausea, vomiting, and diarrhea. Serious reactions are rare but may include allergic reactions or liver problems. Zithrin should be taken as prescribed, and it is important to complete the full course of treatment even if symptoms improve to avoid antibiotic resistance.