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Depression

Esketamine nasal spray effective for rapid improvement of depressive symptoms

The results of a phase III trial have shown that use of an esketamine nasal spray has a significant effect in helping people with treatment-resistant depression.

Woman using a nasal spray

Source: Shutterstock.com

Trial participants using the esketamine nasal spray had a greater change in depression rating at 28 days than those using a placebo spray

The ketamine-related nasal spray esketamine is effective at relieving the symptoms of treatment-resistant depression, a phase III study published in the American Journal of Psychiatry has suggested (21 May 2019)[1].

The trial involved 227 patients who were randomly assigned to intranasal esketamine 56mg or 84mg twice-weekly or placebo, plus an antidepressant. Depressive symptoms were measured on the Montgomery–Åsberg Depression Rating Scale (MADRS), with a mean score of 37 out of 60 in both groups at baseline.

At 28 days, the change in MADRS score was significantly greater in the esketamine group than in the placebo group at –21.4 versus –17.0, respectively. Adverse events, such as dizziness, dissociation, vertigo and nausea, were more common in the active treatment group.

Esketamine is structurally similar to ketamine, and is intended to mimic the drug’s rapid effects on depression while minimising side effects. The researchers said the results of this trial suggested that it could address an unmet need in this condition.

Co-author Michael Thase, professor of psychiatry at the University of Pennsylvania, Philadelphia, said: “The novel mechanism of action of esketamine, coupled with the rapidity of benefit, underpins just how important this development is for patients with difficult-to-treat depression.”

Citation: Clinical Pharmacist DOI: 10.1211/CP.2019.20206698

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