I am hypertensive patient, measure blood pressure value after drinking many times normal, why

Hypertension patients can not drink alcohol normally, because alcohol can cause changes in the patient's blood pressure. Hypertension patients after drinking many measurements of blood pressure values are normal, mainly because alcohol has the role of vasodilation, so the patient's blood pressure in a short period of time will be normal. But patients also need regular oral antihypertensive drugs to control blood pressure.