Taking an additional antihypertensive drug may cause a decrease in blood pressure, but generally does not have a greater impact on the body. There are many types of antihypertensive drugs, such as calcium channel blockers, beta-blockers and angiotensin-converting enzyme inhibitors, etc. Antihypertensive drugs need to be taken at regular intervals as prescribed by the doctor, and it is not advisable to reduce or increase the dosage on your own. If you take one more antihypertensive drug, it will lead to a significant reduction in blood pressure, but it is generally in the normal range or at the threshold, and it will not have any major impact on the body. During this period, you can measure your blood pressure regularly and observe the changes in blood pressure. If your blood pressure is low and you have symptoms such as dizziness, nausea and blurred vision, you should take more rest, and follow the doctor’s instructions to take antihypertensive medications, such as hydrocortisone and oxybutynin, etc. If you have a low blood pressure, you should take more rest. For hypertensive patients, daily need to strictly comply with the doctor’s instructions for medication, not unauthorized dosage.