Eat antihypertensive drugs low pressure suddenly low, if there are no obvious symptoms, you can drink water and rest to observe, no special treatment; if there is dizziness, headache and other obvious symptoms, you need to consult a doctor in a timely manner, under the guidance of the physician to be rehydration, blood pressure, such as the use of adrenaline, dopamine, etc. as prescribed by the doctor. 1. No obvious symptoms: after taking antihypertensive drugs, low pressure suddenly appears to be lowered, the normal low pressure is 60~90mmHg, if it is slightly lowered, and there is no obvious symptoms such as dizziness, headache, etc., it can be appropriate to drink more water, bed rest, monitor the blood pressure situation, and if it continues to fail to return to normal, then consult a doctor in a timely manner. 2. Obvious symptoms: after taking antihypertensive drugs, the low pressure is obviously reduced, and dizziness, headache and other symptoms of insufficient blood supply to the brain, it is recommended to consult a doctor in time, to increase blood volume by rehydration to help raise blood pressure. If necessary, the patient should be treated with antihypertensive drugs, such as epinephrine and dopamine. Pay attention to the monitoring of blood pressure during taking antihypertensive drugs, if the blood pressure is below the normal range repeatedly, it is recommended to consult the doctor in time and adjust the medication program under the guidance of the doctor. Do not take medication without authorization to avoid adverse effects.