Zathrin Injection is used to treat bacterial infections in many different parts of the body. It is also used to prevent Mycobacterium avium complex (MAC) disease in patients infected with the human immunodeficiency virus (HIV). Zathrin belongs to the class of drugs known as macrolide antibiotics. It works by killing bacteria or preventing their growth. However, Zathrin will not work for colds, flu, or other virus infections. Zathrin Injection may be used for other problems as determined by your doctor. Zathrin is available only with your doctor's prescription. Once a medicine has been approved for marketing for a certain use, experience may show that it is also useful for other medical problems. Although these uses are not included in product labeling, Zathrin is used in certain patients with the following medical condition: Trachoma (treatment).

Tell your doctor if you have liver problems (jaundice), muscle problem (myasthenia gravis), heart rhythm disorder (arrhythmia), electrolyte imbalance (low potassium or magnesium level). In rare case, the use of Zathrin-500 Tablet 5's can cause diarrhoea, so in case if you have watery or bloody diarrhoea, stop taking Zathrin-500 Tablet 5's and call your doctor. However, do not take any anti-diarrheal medicine until your doctor tells you. It is not known whether Zathrin-500 Tablet 5's harm the baby in pregnancy or not. Consult your doctor if you are pregnant, planning for pregnancy or breastfeeding before using Zathrin-500 Tablet 5's. Do not take Zathrin-500 Tablet 5's if you are allergic to Zathrin-500 Tablet 5's or other macrolide antibiotics, using cholesterol-lowering drugs (statins like simvastatin, lovastatin etc.), anti-gout or anti-arthritis drugs (colchicine) and medicine for treating overActive bladder (tolterodine). Zathrin-500 Tablet 5's is not recommended for the patients with pneumonia who are judged to be inappropriate for oral therapy due to moderate to severe illness or risk factor.