04/29/2025
The Inflation Reduction Act empowers Medicare to set “maximum fair prices” for small-molecule drugs, which are chemically synthesized pills and tablets, rather than large, protein-based biologics. Small molecules typically treat common conditions, but under the IRA, they face price controls just nine years after approval (compared to 13 years for biologics), shortening the period of market exclusivity and creating a “pill penalty” by cutting off the later years of sales and eroding investors’ expected returns.
In a new case study measuring net present value (NPV), a financial method that converts future profits into today’s dollars, Richard Z. Xie, Tess Cameron, and Peter Kolchinsky modeled a representative launch curve based on Entresto, a small-molecule heart-failure therapy chosen for its typical sales trajectory and high Medicare exposure. They found that under the IRA’s nine-year negotiation, which effectively caps U.S. reimbursement at the maximum fair price, projected profits beyond Year 9 fall to zero. That change slashes project NPV by ~40%, and the model predicts the program would not advance beyond the Phase I decision point.
Our peer-reviewed research on 161 early-stage lead assets (619 individual investments) finds that small-molecule therapies targeting indications with above-median exposure to the Medicare-aged population saw median investment size plunge from $175 million to $45 million (a 74% drop) after the IRA took effect (p ≤ 0.0018).
Together, these analyses show that the IRA’s shorter pricing window for pills is discouraging investment in essential, affordable therapies. Policymakers should extend the small-molecule negotiation window to thirteen years, matching biologics and ensuring developers have time to recoup R&D costs and keep life-saving treatments on the horizon.
Read Xie et al.'s (2025) report here:
The impact of Medicare’s price negotiation on long-term pharmaceutical innovation and patient welfare remains one of the most widely debated topics across stakeholder groups. Existing policy simulations have tried to assess the policy impacts on innovation based on either empirical estimates of el...