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Dictionary of Cancer Terms

View in Spanish: Clonidina

Clonidine (KLOH-nih-deen)
The active ingredient in a drug used to treat high blood pressure. It is also being studied in the treatment of certain types of cancer pain. It blocks the release of chemicals from nerve endings that make blood vessels constrict (get narrower). Clonidine is a type of antihypertensive agent and a type of alpha-adrenergic agonist.

Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.