Vasodilators are mainly divided into the following categories: first, drugs that act on vascular smooth muscle, including nitroglycerin and sodium nitroprusside, nitroglycerin is mainly used in veins, while sodium nitroprusside can dilate arteries and veins; second, angiotensin-converting enzyme inhibitors, such as captopril and enalapril; third, calcium channel antagonists, including nifedipine and amlodipine; fourth, alpha receptor blockers, such as phentolamine and prazosin; fifth, herbal combinations, such as salvia, thromboxane, ginkgo biloba, chuanxiong sweet, danhong. The specific drugs needed are based on the patient’s condition, so don’t take drugs indiscriminately, but take regular medication under the doctor’s instruction.