Ketamine is a medication that has been found to be beneficial in treating various types of conditions such as chronic pain, depression, bipolar disorder, and PTSD. It was first developed in 1962 as a surgical anesthetic but has more recently been approved by the FDA for other uses as well. Ketamine is such an effective and beneficial medication that it is one of the most essential medicines according to the World Health Organization. While use for conditions other than an anesthesia medication is considered “off-label”, it is not abnormal to be prescribed an “off-label” medication. In fact, almost 25% of the medications prescribed are considered “off-label”.