Why hasn’t my family practice or other healthcare professional mentioned Ketamine to me?

In general, physicians and psychiatrists are reluctant to change status quo therapies, and many have never heard of Ketamine used for indications other than anesthesia. In addition, pharmaceutical companies have no interest in marketing this medication because generic Ketamine has been approved by the FDA for over fifty years for use as an anesthetic, so it is unprofitable to promote and sell a drug whose patent expired decades ago.