The topic of treatment side effects is a grey area. FDA only studies drugs and therapies for a few years. If the drug is approved, it can then be administered to millions of people. The long term side effects (i.e. 30 or 40 years) are extremely unknown to the physician, and the patient. However, there are both pros and cons to treatments. A benefit is that the immediate condition can be treated with the drug, but the unknown is that maybe the treatment will cause some other condition down the line. It is a fine line of immediate reward versus long term consequences that the medical field plays and it is one that is almost impossible to be correct every time on.