Major depressive disorder (MDD) is a significant cause of disability worldwide and the most common illness preceding suicide.[L5596,A175462] On March 5, 2019, the nasal spray drug, _esketamine_, also known as _Spravato_ (by Janssen Pharmaceuticals), was approved by the FDA for treatment-resistant major depression. Esketamine is the s-enantiomer of [Ketamine]. Ketamine is a mixture of two enantiomers (mirror image molecules). This is the first time that the FDA has approved esketamine for any use. The FDA approved ketamine (Ketalar) in 1970.[L5593] Esketamine may prove to be a promising treatment for patients diagnosed with major depressive disorder who have not experienced an improvement in symptoms despite treatment with various medications and therapies. The intranasal route of administration for this drug allows for easy administration and a fast onset of action, which sets it apart from many other antidepressant agents that may take several weeks to take effect.
Esketamine is indicated in combination with an oral antidepressant for the treatment of treatment-resistant depression in adults.[L12999] It is also indicated for the treatment of depressive symptoms in adults with major depressive disorder experiencing acute suicidal ideation or behaviour.[L12999]
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