Wine contains a large amount of alcohol, alcohol metabolism generates acetaldehyde, can diastole blood vessels, resulting in a transient drop in blood pressure. Part of the population after drinking alcohol will appear the phenomenon of lower blood pressure, mainly due to alcohol in the body by metabolism to generate acetaldehyde, acetaldehyde on the existence of vascular stimulation, able to diastolic blood vessels, insufficient blood supply to the heart, cardiac output decreased, resulting in a drop in blood pressure, and even stimulate the body of some of the hormone metabolism abnormality, inhibit the contraction of the myocardium, resulting in a drop in blood pressure. In general, acetaldehyde-induced blood pressure reduction is only transient, the human body has a stable blood pressure regulation mechanism, so that blood pressure fluctuations within the normal range. Drinking alcohol should be moderated, not to drink too much, causing harm to the body.