Nacsin 500mg Injection is an antibiotic used to prevent or treat a wide variety of bacterial infections. These may include infections of the urinary tract, bones, and joints, lungs (eg. pneumonia), brain, blood, among others. It is also used in hospitalized patients to prevent infections. Nacsin 500mg Injection works by stopping the growth of bacteria. It is given as a drip (intravenous infusion) or as an injection directly into a vein or a muscle under the supervision of a healthcare professional and should not be self-administered. It should be used regularly at evenly spaced time intervals as prescribed by your doctor. Do not skip any doses and finish the full course of treatment even if you feel better. Stopping the medicine too early may lead to the infection returning or worsening. Common side effects of this medicine include injection site reactions and increased blood urea. Consult your doctor if any of these side effects persist or if your condition does not improve despite treatment. Some patients receiving high doses may develop balance disorder (loss of balance), kidney damage, and hearing loss. Therefore, please follow all the instructions given by your doctor while using this medicine. Your doctor may also monitor you with regular kidney function tests, hearing tests, and urine tests during treatment. This medication is not recommended for use during pregnancy. Inform your doctor if you are pregnant, planning to conceive, or breastfeeding.