Acadia Expects CHMP Rejection of Rett Syndrome Drug, Tees Up EU Delay
Acadia expects a negative CHMP opinion on its trofinetide marketing application for Rett syndrome, likely delaying potential EU approval. This regulatory setback could push back the product’s launch timeline and weigh on projected European revenue growth.
1. Company Expects Negative CHMP Opinion for Rett Syndrome Drug in EU
Acadia Pharmaceuticals today confirmed that the European Medicines Agency’s Committee for Medicinal Products for Human Use (CHMP) is likely to issue a negative opinion on its trofinetide marketing application for Rett syndrome. The CHMP is scheduled to vote in late February 2026, and management now anticipates that a negative ruling will postpone any EU approval until the second half of 2026. Acadia had projected trofinetide EU launch revenues of €50 million in 2026 but is revising that estimate downward by roughly 20%. The setback will require the company to rely more heavily on its U.S. franchise, particularly NUPLAZID®, while preparing an additional clinical study to address CHMP concerns over long-term safety data.
2. Strong Earnings Surprise History Positions Acadia for Another Beat
Acadia has a notable track record of exceeding consensus earnings estimates, beating expectations in each of the past eight quarters. On average, the company’s quarterly adjusted EPS surpassed analyst forecasts by 15%, translating to a mean surprise of $0.05 per share. Operational leverage in its U.S. specialty neurology segment, combined with a 10% reduction in G&A expenses over the last year, has driven a pre-tax margin expansion of 250 basis points. As of December 31, 2025, Acadia held cash and marketable securities totaling $600 million, providing additional runway for continued R&D investment and potential M&A opportunities.
3. Q4 2025 Earnings Outlook
Analysts currently project Acadia’s fourth-quarter 2025 revenue at $120 million, up from $110 million in the year-ago period, reflecting a 9% year-over-year increase. Growth is expected to be fueled by sustained U.S. sales of NUPLAZID®—which accounted for 85% of total sales in prior quarters—and an accelerating uptake of trofinetide following its U.S. launch in September 2025, where prescription volume reached 3,000 scripts in the first month. R&D expenditures are forecast to remain near $60 million, while adjusted EBITDA margins are estimated at 30%, supporting a full-year outlook of positive free cash flow generation in excess of $100 million.