US Health and Human Services Secretary Robert F. Kennedy Jr. on Wednesday tried to defend President Donald Trump’s mathematically absurd claims about prescription drug prices by saying the president has his own unique method of calculating percentages.
During a Senate Finance Committee hearing, Sen. Elizabeth Warren (D-Mass.) grilled Kennedy about the president’s repeated false claims that he has slashed the prices of prescription drugs by as much as 600%, which would mean that pharmaceutical companies are paying consumers to take their medications.
“President Trump has his own way of calculating,” Kennedy replied. “There’s two ways of calculating percentages. If you have a $600 drug, and you reduce it to $10, that’s a 600% reduction.”
RFK Jr: “President Trump has a different way of calculating percentages. If you have a $600 drug and you reduce it to $10, that’s a 600% reduction.” pic.twitter.com/MjDNADqc8p
— Aaron Rupar (@atrupar) April 22, 2026
In fact, such a drop in price would represent a 98.3% reduction, less than one-sixth the size of the president’s claims. A 600% reduction in the price of a $600 drug would mean that drug manufacturer paid consumers $3,000 every time they picked up their prescription.
Kit Yates, a mathematician at the University of Bath, marveled at Kennedy’s attempts to create an alternate version of arithmetic.
“We’ve known for a while that the USA’s current regime have been out for science, but I never thought they would try to mess with math!” Yates wrote in a social media post. “You can’t just redefine how you calculate percentages.”
In addition to exposing Kennedy’s apparent ignorance of elementary mathematics, Warren shined a light on how the TrumpRx website misleads consumers into thinking they’re being offered bargains on prescription drugs that are available elsewhere in generic varieties.
In once instance, Warren noted that TrumpRx is selling a brand-name heartburn medication for $200, whereas a generic version of the same drug is available at Costco for $16. Warren also highlighted a heart arrhythmia drug for sale on TrumpRx for $336, even though a generic version of the drug is available at Costco for $12.
Warren added that, in exchange for making select brand-name drugs available on the TrumpRx website, pharmaceutical companies have gotten exemptions from the president’s 100% tariffs on imported patented medicines.
“Think about that: Big Pharma makes billions of dollars in tariff relief by listing their drugs on TrumpRx, and then they don’t even lower the costs on many of these drugs,” she said. “That is a great deal for Big Pharma.”
Warren’s analysis of TrumpRx’s pricing scheme echoes a March report from the Center for American Progress (CAP), which found that the president’s prescription drug website offered genuinely lower prices on “exactly one” of the 54 medications listed.
CAP also found that nearly one-third of the drugs available on the TrumpRx website have generic alternatives that were cheaper than what was being offered, and that the website made no mention of this.
Reuters reported in December that at least 350 branded medications are set for price hikes in 2026, including “vaccines against Covid, RSV, and shingles,” as well as the “blockbuster cancer treatment Ibrance.”
Later in the Senate Finance Committee hearing, Sen. Bernie Sanders (I-Vt.) ridiculed Kennedy for claiming that, under Trump’s leadership, “the American people are now paying the lowest costs in the world rather than the highest for prescription drugs.”
“That is an absurd statement,” Sanders said. “Nobody in the world believes that.”
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