DENVER –
In a phase 3 trial that included more than 500 adult patients with MDD, those who received zuranolone for 14 days showed greater improvement at day 15 across numerous QoL outcomes, compared with their counterparts in the placebo group.
Dr. Anita H. Clayton
In addition, combined analysis of four zuranolone clinical trials showed “mental well-being and functioning improved to near general population norm levels” for the active-treatment group, reported the researchers, led by Anita H. Clayton, MD, chair and professor of psychiatry, University of Virginia, Charlottesville.
“Based on these integrated analyses, the benefit of treatment with zuranolone may extend beyond reduction in depressive symptoms to include potential improvement in quality of life and overall health, as perceived by patients,” they add.
The findings were presented as part of the Anxiety and Depression Association of America Anxiety & Depression conference.
First oral formulation
Zuranolone represents the second entry in the new class of neuroactive steroid drugs, which modulate GABA-A receptor activity – but it would be the first to have an oral formulation. Brexanolone, which was approved by the Food and Drug Administration in 2019 for postpartum depression, is administered through continuous IV infusion over 60 hours.
As previously reported by this news organization, zuranolone improved depressive symptoms as early as day 3, achieving the primary endpoint of significantly greater reduction in scores on the 17-item Hamilton Rating Scale for Depression from baseline to day 15 versus placebo (P = .014).
In the new analysis, patient-reported measures of functional health and well-being were assessed in the WATERFALL trial. It included 266 patients with MDD who were treated with zuranolone 50 mg daily for 2 weeks and 268 patients with MDD who were treated with placebo.
The study used the Short Form–36 (SF-36v2), which covers a wide range of patient-reported measures, including physical function, bodily pain, general health, vitality, social function, and “role-emotional” symptoms.
Results showed that although the treatment and placebo groups had similar baseline SF-36v2 scores, those receiving zuranolone reported significantly greater improvements at day 15 in almost all of the assessment’s domains, including physical function (treatment difference, 0.8), general health (1.0), vitality (3.1), social functioning (1.1), and role-emotional symptoms (1.5; for all comparisons, P < .05). The only exceptions were in role-physical symptoms and bodily pain.
In measures that included physical function, bodily pain, and general health, the patients achieved improvements at day 15 that were consistent with normal levels, with the improvement in vitality considered clinically meaningful versus placebo.