The FDA has approved Zontivity (vorapaxar) tablets to reduce the risk of heart attack, stroke, cardiovascular death and need for procedures to restore the blood flow to the heart in patients with a previous heart attack or blockages in the arteries to the legs.

Zontivity is the first in a new class of drug, called a protease-activated receptor-1 (PAR-1) antagonist. It is an anti-platelet agent, designed to decrease the tendency of platelets to clump together to form a blood clot. By decreasing the formation of blood clots, Zontivity decreases the risk of heart attack and stroke.

Zontivity must not be used in people who have had a stroke, transient ischemic attack (TIA), or bleeding in the head, because the risk of bleeding in the head is too great.

“In patients who have had a heart attack or who have peripheral arterial disease, this drug will lower the risk of heart attack, stroke and cardiovascular death. In the study that supported the drug’s approval, Zontivity lowered this risk from 9.5% to 7.9% over a 3-year period—about 0.5% per year,” said Ellis Unger, M.D., director of the Office of Drug Evaluation I in the FDA’s Center for Drug Evaluation and Research. 

Health care professionals should inform patients that they may bleed and bruise more easily when taking Zontivity. Patients should report to their health care professional any unanticipated, prolonged or excessive bleeding, or blood in their stool or urine.

In a clinical trial with over 25,000 participants, Zontivity, added to other anti-platelet agents (generally aspirin and clopidogrel), reduced the rate of a combined endpoint of heart attack, stroke, cardiovascular death and urgent procedures to improve blood flow to the heart (coronary revascularization) when compared to an inactive pill (placebo).

Zontivity is made by Merck Sharp & Dohme Corp., a subsidiary of Merck & Co., of Whitehouse Station, N.J.