Zathrin 500 MG Tablet is an antibiotic used to treat bacterial infections of the nose, throat, tonsils, ears, lungs, skin, etc. It works by blocking the formation of proteins required for bacterial growth. Thus it prevents further bacterial growth and multiplication. Zathrin 500 MG Tablet may cause side effects such as stomach pain, diarrhoea, nausea, headache, etc. Consult your doctor if these symptoms persist or become severe. Seek immediate medical attention if you experience symptoms like skin rash, itching/swelling of the face/throat/tongue, difficulty breathing, etc.