Taking antihypertensive drugs can not eat grapefruit and its products and high caffeine content of food, also can not drink alcohol, to take antihypertensive drugs patients also need to pay attention to eat less or avoid eating high salt, high sugar, high fat food. Grapefruit and its products can cause the liver to metabolize drug enzyme activity is reduced, affecting the metabolism of drugs. If grapefruit juice and nifedipine are taken at the same time, due to the first-pass effect or reduced clearance can make the blood concentration increase and prolong its action time in the body, enhance the effect of antihypertensive, resulting in excessive lowering of blood pressure. Taking antihypertensive drugs should not eat strong tea, coffee and other high caffeine content of food, so as not to affect the effectiveness of the drug. Drinking alcohol will increase the burden on the liver, which also tends to affect the efficacy of the medicine, leading to poor blood pressure control. In addition, patients who need to take antihypertensive drugs in addition to the above specific food can not eat, daily life also need to pay attention to eat more vitamin C-rich fresh fruits and vegetables, pay attention to low-fat, low-salt, low-sugar diet.