Azillin, the brand name for Azithromycin 500mg tablets, is an antibiotic used to treat bacterial infections. It is effective against respiratory, skin, and sexually transmitted infections. The typical dosage is one 500mg tablet daily, following healthcare provider instructions. Common side effects include gastrointestinal issues and headaches. Allergic reactions are rare but possible. It’s important to avoid Azillin if allergic to azithromycin, inform about liver/kidney issues, and discuss potential drug interactions with a healthcare provider. Complete the full course of treatment, even if symptoms improve early.