Learning About Vasodilators

Overview

Vasodilators are a type of medicine that help widen blood vessels. They can lower blood pressure. And they make it easier for the heart to pump blood. They are used to treat heart failure and high blood pressure. When used with other medicines for heart failure, they may help relieve symptoms. And they may help lower the risk of serious problems.

Examples

For each medicine in the list, the generic name is first. This is followed by a brand name.

• Hydralazine (Apresoline)
• Isosorbide dinitrate and hydralazine (BiDil)

This is not a complete list of vasodilator medicines.

Possible side effects

All medicines can cause side effects.

Some side effects of vasodilators are:

• Feeling dizzy or lightheaded.
• Headaches.
• Flushing. You may feel warm in the face and neck.
• Nausea.

You may have other side effects or reactions not listed here. Check the information that comes with your medicine. Or ask your doctor or pharmacist about the side effects of each medicine you take.

What to know about taking this medicine

• If you take hydralazine and isosorbide dinitrate, DO NOT use medicines that enhance erections. These include sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra). If taken together, they can cause very low blood pressure. This can cause serious problems.
• Taking other medicines may also cause problems. Tell your doctor or pharmacist all the medicines you take. This includes other prescription and over-the-counter medicines, vitamins, supplements, and herbal remedies.
• Be safe with medicines. Take your medicines exactly as prescribed. Contact your doctor if you think you are having a problem with your medicine. Also contact your doctor if you missed a dose of a medicine.
• Do not take these medicines if you are pregnant, breastfeeding, or planning to become pregnant.
• You may need regular blood and urine tests to see if the medicines are causing any problems.