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Generic Name: Hydralazine

Brands: Apresoline 

Class: Vasodilator

Availability: Prescription required

Molecular Formula: C8H8N4

Substance UNII: 26NAK24LS8

What is Hydralazine?

Hydralazine is a vasodilator, blood vessel-widening medication, sold under the trade name Apresoline.

What is Hydralazine Used For?

Hydralazine is used for the treatment of chronic high blood pressure, or hypertension. It is also effective to bring down dangerously high blood pressure from conditions like a hypertensive crisis or preeclampsia. 

How Does Hydralazine Work?

Hydralazine relaxes blood vessels, increasing the supply of blood and oxygen to the heart, thereby reducing stress on the cardiovascular system. As a result, blood pressure lowers.

How Long Does it Take for Hydralazine to Work?

Hydralazine is rapidly absorbed and should work quickly. It reaches peak plasma levels in about one to two hours, according to the FDA

Do Not Use Hydralazine If:

There are several situations where this medication may not be the right choice for you. According to the FDA, the following should not use hydralazine:

  • Hypersensitivity to hydralazine
  • Coronary artery disease
  • Mitral valvular rheumatic heart disease

Please note that this list may not be complete, and there may be other situations where the use of this drug is not advisable.

Disclaimer: this article does not constitute or replace medical advice. If you have an emergency or a serious medical question, please contact a medical professional or call 911 immediately. To see our full medical disclaimer, visit our Terms of Use page.

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