The U.S. Food and Drug Administration has approved a nasal spray to treat depression—the first-ever stand-alone medication for patients with severe depression. Johnson & Johnson said patients who use the nasal spray Spravato—which is made from the drug esketamine—may see improvements in depressive symptoms in as little as 24 hours.

The U.S. Food and Drug Administration expanded approval for Johnson & Johnson’s nasal spray, Spravato, to allow it to be used as a standalone treatment for patients with severe depression, the company said on Tuesday.

Johnson & Johnson's ketamine-derived nasal spray has been approved as a standalone treatment to fight depression for those who had an inadequate response to oral antidepressants.