An emerging treatment for clinical depression has reached an important milestone. This week, the Food and Drug Administration approved Johnson & Johnson’s ketamine-based nasal spray, Spravato, as a standalone therapy for cases of depression that haven’t responded to other options.

It is a hallucinogenic drug, and is a controlled substance designed for use as an aesthetics. It also has now been touted for its potential as a therapy for depression.

"Treatment-resistant depression can be very complicated, especially for patients who do not respond to oral antidepressants or cannot tolerate them. For too long, health care providers have had few options to offer patients much-needed symptom improvement,