Headache after taking nifedipine is a common side effect of nifedipine tablets, which is related to the rapid vasodilation of blood vessels in the head and face caused by nifedipine tablets. Patients may also experience redness of the face, feel heat on the face, headache, swelling of the face, and other side effects from taking nifedipine tablets, as well as an uncomfortable increase in heart rate. In this case, patients should drink more water to promote the excretion of the drug, stop taking oral nifedipine tablets, and can switch to other types of antihypertensive drugs. Other Ca+2 antagonists can be taken orally, such as amlodipine besylate or levamlodipine maleate, which are more commonly used in clinical practice and can have a good effect on lowering blood pressure. If all Ca+2 antihypertensive drugs are not tolerated, you can switch to other kinds of antihypertensive drugs, such as ACEI or ARB antihypertensive drugs, commonly used like telmisartan and irbesartan.