Whether or not you need to take the medication for 3 days after stopping the medication depends on your blood pressure at a later stage. If the blood pressure can be maintained within the normal range later, no medication can be taken; if the blood pressure increases or decreases again, it is necessary to continue to take medication. In a quiet state, the normal range of diastolic blood pressure is 60 to 89 mmHg, and the normal range of systolic blood pressure is 90 to 139 mmHg. Metabolism of the drug usually takes about 1 day to 7 days. The metabolism time varies from drug to drug. Therefore, 3 days after stopping the drug, the drug may be completely metabolized or not completely metabolized, whether you need to take the drug also needs to be judged according to the changes in blood pressure. Blood pressure may increase or decrease. If the blood pressure is low, it may be related to malnutrition, heart disease and other reasons. If your blood pressure is normal for 3 days after stopping the medication, you can continue to observe it, and if your blood pressure decreases again, you will need to continue to take the medication. If the blood pressure is high, if the drug metabolism is complete and the blood pressure is still normal, you can not take the drug and continue to observe. If you are taking a long-acting drug, and the metabolism of the drug is incomplete after 3 days of stopping the drug, your blood pressure may still rise later, so you need to continue to take the drug. Generally, patients with essential hypertension who need to take long-term medication will still have elevated blood pressure after stopping the medication, because essential hypertension will not be completely cured by taking medication for a period of time. Therefore, if the blood pressure is normal for 3 days after stopping the medication, it is necessary to continue to monitor the blood pressure and take or stop the medication under the guidance of the doctor.