It is estimated that every year, 16 million American adults are debilitated by major depression. It is a dangerous, growing trend in our society. For example, depression-related suicides increased by 30% between 1999 and 2016. There are several options for treating depression, including talk therapy and medications. But for some, nothing seems to work; they are considered treatment-resistant. For these people, however, there is another option for treatment. Ketamine infusion therapy is a substance that is usually delivered intravenously and provides rapid relief. Let’s take a look at what ketamine is, how it works, and how to prepare for treatment.