While Humira being the top-selling drug is on the decline due to increased competition and expiring patents, another drug is set to take the number-one position. With the continued regulatory wins, it should be no surprise that Merck’s Keytruda is poised to assume the best-selling drug mantle.
https://www.biospace.com/article/keytruda-set-to-become-world-s-top-selling-drug-forecast-shows/