Merck's drug reduced bad cholesterol by up to 64.6% in late-stage trial https://www.reuters.com/business/healthcare-pharmaceuticals/mercks-drug-reduced-bad-cholesterol-by-646-late-stage-trial-2026-03-30/?taid=69caa194a33d850001ce93fb https://www.reuters.com/business/healthcare-pharmaceuticals/mercks-drug-reduced-bad-cholesterol-by-646-late-stage-trial-2026-03-30/?taid=69caa194a33d850001ce93fb