Cold and flu can usually take blood pressure medicine. Cold belongs to a kind of acute upper respiratory tract infection, mostly caused by viral infection, and its clinical symptoms mainly include fever, cough, nasal congestion, runny nose, sore throat and so on. And antihypertensive drugs refer to blood pressure-lowering drugs, that is, through a variety of mechanisms of action to make blood pressure drop. Commonly used blood pressure-lowering drugs include calcium antagonists, diuretics, angiotensin-converting enzyme inhibitors, angiotensin receptor antagonists and so on. No matter which kind of blood pressure-lowering drug has no effect on colds, neither is it a factor that causes colds, nor does it lead to the aggravation of cold symptoms. Therefore, patients with high blood pressure should take normal blood pressure medication to maintain stable blood pressure after catching a cold. However, if the cold and fever lead to excessive loss of body fluids, shock or infectious shock, that is, manifested as low blood pressure, generally can not take blood pressure medicine, but this situation is extremely rare.