In early March, Esperion Therapeutics ( ESPR -1.41% ) reported data from the first of five trials evaluating its cholesterol-lowering drug, bempedoic acid. The data show it reduces bad cholesterol levels, but share prices fell because of safety concerns. On Tuesday, it appears those concerns are waning following data from a phase 2 trial evaluating its use alongside PCSK9 inhibitors in patients with hypercholesterolemia.