On December 13, 2024, the U.S. Food and Drug Administration (FDA) approved Crenessity™ (crinecerfont) to be used with glucocorticoids to control androgens in adults and pediatric patients 4 years and older with classic congenital adrenal hyperplasia (CAH). CAH is a rare genetic condition affecting the adrenal gland, which produces hormones such as cortisol and androgens. The end result of this genetic condition is that patients with classic CAH do not produce cortisol and produce too many androgens, requiring treatment with high doses of a type of steroid called glucocorticoids. Unfortunately, long-term use with high doses of glucocorticoids can cause side effects such as obesity, high blood pressure and reduced bone density. Crenessity™ is the first and only treatment for classic CAH that directly reduces adrenal androgen production, allowing for glucocorticoid dose reduction.
The approval was based on two randomized, double-blind, placebo-controlled trials in 182 adults and 103 children with classic CAH. In both study trials, the participants who received Crenessity™ experienced reduced adrenal androgen production, compared to an average increase from baseline in the placebo group. The most common side effects of Crenessity™ in adults include fatigue, dizziness and joint pain. For pediatric patients, the most common side effects are headache, abdominal pain and fatigue.