Why does headache relief occur after taking nifedipine sustained-release tablets for high blood pressure?

Patient's question:

I am a railway maintenance and repair personnel, 51 years old, male. I have had slightly high blood pressure before and have been taking antihypertensive medication. I would like to consult: I have high blood pressure, but why does my headache get smaller after taking nifedipine sustained-release tablets? What is the reason for this?

Doctor's answer:

Patients with hypertension may experience headaches again due to cerebral vasospasm. After taking nifedipine sustained-release tablets, vasodilation will occur again, causing blood pressure to drop to normal levels, cerebral vasospasm will gradually decrease, and headaches will gradually subside. Patients with hypertension need to pay attention to rest during daily life, avoid overexertion, and also avoid foods with heavy taste and high salt content.

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