N-Systin-600 Tablet is a prescription medication used to treat respiratory diseases like bronchitis, asthma, and emphysema. It reduces mucus secretion and can be taken with or without food. The dosage depends on the condition. Common side effects include fever, nausea, vomiting, rash, and gastrointestinal discomfort. It's important to inform your doctor about asthma, other medications, and pregnancy or breastfeeding history to ensure proper treatment. Drinking plenty of fluids is advised during treatment.