Koxylar 400mg Tablet is an antibiotic that belongs to a class of medicines known as anti tuberculosis drugs. It is used in the treatment and prevention of tuberculosis, an infectious disease that mainly affects the lungs and in some cases other parts of the body. Koxylar 400mg Tablet is usually given in combination with at least one other tuberculosis medicine. It should be used in the dose and duration as advised by your doctor. This medicine may be taken with or without food, preferably at the same time every day. Do not skip any doses and finish the full course of treatment even if you feel better. Stopping it early can result in treatment failure and in the development of drug-resistant tuberculosis. This can lead to serious health complications. If you miss a dose, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular schedule. Do not double the dose as it may increase the side effects. Some people may experience visual impairment and color blindness, as side effects of this medicine. Please consult your doctor if these side effects do not resolve or worsen. Inform your doctor if you have diabetes as it can lower the sugar levels in the blood. If you are diabetic, you should monitor your blood sugar regularly. Your doctor may monitor your liver function, vision, and thyroid function while on treatment with this medicine.