The prescription drug Accupril^® (quinapril hydrochloride) is licensed to treat several conditions related to the heart and blood vessels, including high blood pressure and symptoms of congestive heart failure. Accupril lowers blood pressure by blocking an enzyme in the body that causes blood vessels to constrict. By lowering blood pressure, Accupril can reduce the risks that accompany long-term high blood pressure. Accupril side effects can include dizziness, shortness of breath, and a cough, among other things. Accupril comes as a tablet taken once or twice daily on an empty stomach. It is available in several strengths. Accupril tablets should be stored in an airtight container at room temperature, and away from moisture and heat.