March 10: The FDA approved Acadia Pharmaceuticals Inc.’s Daybue (trofinetide) for the treatment of Rett syndrome in people at least 2 years old. The drug is the only FDA-approved treatment for the complex, rare neurodevelopmental disorder, which is estimated to affect 6,000 to 9,000 people in the U.S. The agency gave the drug fast track status and orphan drug designation; it also gave the company a rare pediatric disease priority review voucher. Dosing of the oral solution is weight based and can be given orally or via gastrostomy tube. The company has not disclosed the agent’s price, but analyst estimates are between $400,000 and $600,000 per year. Acadia said it expects the agent to be available by the end of April.
March 13: The FDA expanded the patient population of Mirum Pharmaceuticals, Inc.’s Livmarli (maralixibat) to include the treatment of cholestatic pruritus in people with Alagille syndrome who are at least 3 months old. The agency initially approved the oral solution on Sept. 29, 2021. The starting dose is 190 mcg/kg once daily and then increased to 380 mcg/kg after one week. Drugs.com lists the price of 9.5 mg/mL for 30 milliliters as more than $53,712.