When the White House announced a Most Favored Nation (MFN) drug pricing agreement with Regeneron Pharmaceuticals on April 23rd, it wasn’t just another deal. It was the final piece of a puzzle the Trump administration had been assembling for over a year. Regeneron was the 17th — and last — of the major pharmaceutical companies targeted by the administration to sign on, completing a full sweep that few in Washington had expected to happen this quickly.

What Is “Most Favored Nation” Pricing? The concept is straightforward, even if the politics are anything but. For decades, Americans have paid dramatically more for prescription drugs than patients in other wealthy nations. The same medication sold in Germany, Japan, or Canada often carries a fraction of the U.S. price tag. The administration’s MFN policy aims to fix that by tying what American patients pay to the lowest price offered in comparable developed nations — ensuring the U.S. gets the same deal as everyone else.

President Trump signed an executive order outlining the initiative in May 2025 and launched TrumpRx.gov on February 5, 2026, a government portal where patients can access drugs at MFN-aligned prices. Since then, administration officials have been negotiating voluntary pricing agreements one company at a time.

Under the deal, Regeneron committed to several significant concessions:

– – Medicaid access at MFN prices — Every state Medicaid program will now have access to Regeneron products at MFN pricing, with the White House projecting hundreds of millions in savings for the program that serves the country’s most vulnerable patients.
– – Future drugs at MFN rates — Regeneron agreed to align pricing for all new innovative medicines it brings to market with prices set in the comparable group of developed nations — a notably forward-looking commitment.
– – Praluent on TrumpRx.gov — The company’s cholesterol-lowering drug will be available at a discounted price through the government portal.
– – A free gene therapy — Coinciding with the announcement, Regeneron received FDA approval for Otarmeni, the first gene therapy for genetic hearing loss. As part of the deal, the company agreed to make it available at no cost to eligible U.S. patients.
– – $27 billion U.S. investment — Regeneron separately announced a commitment to invest $27 billion in American research, development, and manufacturing by 2029, more than doubling its domestic biologic production capacity.

Regeneron co-founder and CEO Dr. Leonard Schleifer didn’t sound like a reluctant partner in his statement. “For too long, American patients and taxpayers have shouldered a disproportionate share of the cost of biotechnology innovation,” he said, adding that other high-income nations have not been “paying their fair share” for the breakthroughs they rely on. Schleifer has reportedly made this argument privately for over a decade — the MFN framework, in his framing, gave him a mechanism to finally act on it.

The Regeneron deal brings the total number of MFN agreements to 17, encompassing pharma giants including Pfizer, AstraZeneca, Eli Lilly, Novo Nordisk, Amgen, Bristol Myers Squibb, Gilead Sciences, Merck, Novartis, Sanofi, Johnson & Johnson, and AbbVie, among others. The White House estimates that combined U.S. pharmaceutical investment commitments under President Trump now total $448 billion over just 15 months.

The administration has also signaled it intends to expand the framework beyond the original 17, with expectations of reaching similar agreements with most manufacturers of sole-source brand-name drugs and biologics. Efforts are also underway to codify the voluntary agreements into law through Congress, which would lock in the pricing protections for the long term.

Whether the MFN model delivers lasting relief for American patients will depend on several factors still unresolved: how aggressively the agreements are enforced, whether Congress acts to make them permanent, and how drug companies manage pricing globally as they balance domestic commitments against foreign markets. Critics have also raised questions about potential impacts on pharmaceutical innovation incentives over the long run.

For now, though, one chapter has clearly closed. Every company on the administration’s list has signed on — and the last holdout brought a gene therapy giveaway and a $27 billion investment pledge along with it.