Tetrarid Antibiotic capsules are used to treat bacterial infections in the body. It can help with infections of the lungs, urinary tract, eyes, and other parts of the body. It kills bacteria, allowing your symptoms to improve and the infection to be cured. Tetrarid Many sexually transmitted illnesses are also treated using capsules. it is best to take it first thing in the morning. You should take it on a regular basis, at evenly spaced intervals, as directed by your doctor. It will be easier for you to remember to take it if you take it at the same time every day. The dosage will vary depending on your condition, but you should always finish the entire course of antibiotics given by your doctor. Even if you feel better, keep taking it until you've finished it. Some bacteria may survive if you stop taking it too soon, and the infection may return.