However, shares of drug giant Eli Lilly dropped as much as 3. Merck’s earnings got a slight lift from sales howw cancer immunotherapy drug Keytruda and vaccines — amid the worst measles outbreak since health officials declared the disease eradicated from the U. Health care has been the worst-performing sector in the stock market this year on concerns about drug price reform and «Medicare for All» proposals from Democratic lawmakers. The company said it expects further price declines in the United States this year as well as increased competition from generics, including for erectile dysfunction drug Cialis. The U. Lilly has been facing pressure from Congress to lower prescription drug costs. In March, the company disclosed for the first time what it charges wholesalers versus what many patients typically phama. It also announced plans to sell a half-price version of insulin injection Humalog. Keytruda, which boosts the immune system to attack cancer, has driven growth fo...