Other nonhormonal options
Oxybutynin is another a nonhormonal agent under investigation for vasomotor symptoms. It’s an anticholinergic that resulted in 80% fewer hot flashes, compared with 30% with placebo in a 2016 trial, but 52% of women complained of dry mouth. A more recent study similarly found high efficacy – a 60%-80% drop in hot flashes, compared with 30% with placebo – but also side effects of dry mouth, difficulty urinating, and abdominal pain.
Finally, Dr. Reed mentioned three other agents under investigation as possible nonhormonal therapeutics, though she has little information about them. They include MT-8554 by Mitsubishi Tanabe; FP-101 by Fervent Pharmaceuticals; and Q-122 by QUE Oncology with Emory University, Atlanta, and the University of Queensland, Brisbane, Australia.
None of the currently available nonhormonal options provide as high efficacy as hormones, but they do reduce symptoms:
Clonidine is an off-label option some physicians already use as a nonhormonal treatment for vasomotor symptoms, but again, the side effects are problematic: dry mouth, constipation, drowsiness, postural hypotension, and poor sleep.
Paroxetine, at 7.5-10 mg, is the only FDA-approved nonhormonal treatment for vasomotor symptoms, but she listed other off-label options found effective in evidence reviews: gabapentin (100-2,400 mg), venlafaxine (37.5-75 mg), citalopram (10 mg), desvenlafaxine (150 mg), and escitalopram (10 mg).
“I want you to take note of the lower doses in all of these products that are efficacious above those doses that might be used for mood,” Dr. Reed added.
Dr. Reed receives royalties from UpToDate and research funding from Bayer. Dr. Santoro owns stock in MenoGeniX and serves as a consultant or advisor to Ansh Labs, MenoGeniX, and Ogeda/Astellas.
A version of this article originally appeared on Medscape.com.