Low blood pressure after taking antihypertensive drugs at night needs to monitor the blood pressure, adjust the medication, stop the medication, rehydration and so on. 1. Whether it is the first diagnosis or re-diagnosis of hypertension patients, generally after taking antihypertensive drugs at night blood pressure will be reduced, at this time need to monitor the blood pressure, according to the monitoring of the blood pressure and medical advice to consider whether to adjust the dose of antihypertensive drugs, drug taking time or discontinue antihypertensive drugs. 2. If the blood pressure is very low after taking the medicine, less than 90/60mmHg, which is in low blood pressure, the patient may be uncomfortable, and may consider giving rehydration treatment according to the doctor’s instructions (such as compound sodium chloride solution). Low blood pressure after taking antihypertensive drugs, must need to monitor blood pressure, find a doctor to determine the next step in the treatment program.