Aritoz Tablet is used alone or with other treatments, such as surgery or radiation, to treat early breast cancer in postmenopausal women. It can also be used as the first line treatment of advanced breast cancer that has spread within the breast or to other areas of the body. Aritoz Tablet belong to a class of drug called aromatase inhibitors, which decreases the amount of estrogen in the body. It should be taken with or without food, but take it at the same time every day to get the most benefit. It should be taken as your doctor's advice. The dose and how often you take it depends on what you are taking it for. Your doctor will decide how much you need to improve your symptoms. Swallow the tablets whole with a drink of water. You should take this medicine for as long as it is prescribed for you. The most common side effects of the medicine include hot flushes, nausea, rashes, joint pain, osteoporosis, and weakness. If these bother you or appear serious, let your doctor know. There may be ways of reducing or preventing them. Before taking this medicine, tell your doctor if you are not gone through menopause and still having menstrual periods, or you have a problem with the liver or kidney. Your doctor should also know about all other medicines you are taking as many of these may make this medicine less effective or change the way it works. Tell your doctor if you are pregnant or breastfeeding. Your doctor may perform some blood tests to check for vitamin D level or bone density.