Fezolinetant: A New Nonhormonal Treatment for Vasomotor Symptoms

Objective: To review the safety, efficacy, and tolerability of fezolinetant for the treatment of vasomotor symptoms associated with menopause. Data Sources: A literature search was conducted through PubMed using the following search terms: fezolinetant, ES259564, SKYLIGHT, vasomotor symptoms, and menopause. Study Selection and Data Extraction: Selected articles included those which described clinical studies of the pharmacology, pharmacokinetics, efficacy, safety, or tolerability of fezolinetant. Data Synthesis: Fezolinetant works by inhibiting neurokinin B from binding to its receptor in the hypothalamus, thereby decreasing the occurrence of vasomotor symptoms. Clinical trials have demonstrated fezolinetant is superior to placebo in decreasing the frequency and severity of vasomotor symptoms. Common adverse effects associated with the use of fezolinetant include headache and gastrointestinal disturbances, as well as elevations in liver transaminase levels. Conclusions: Clinical practice guidelines for the treatment of vasomotor symptoms associated with menopause recommend hormone therapy as the most effective treatment option. Risks associated with hormone use may limit the use of this option in some patients. Neurokinin B inhibitors, like fezolinetant, target the physiologic cause of vasomotor symptoms. With the approval of fezolinetant, as well as elinzanetant which is currently in phase 3 clinical trials, providers and patients have additional nonhormonal treatment options for vasomotor symptoms associated with menopause.