Ketamine is a medication that has been used in anesthesia for many years. More recently, however, practitioners have begun using it in lower doses to treat depression. Ketamine therapy is generally only recommended for patients who have failed to find relief from typical antidepressants. It can be life-changing for many of these patients, but it's not necessarily right for everyone. Consider the following pros and cons of ketamine infusions before you opt to try it yourself.