Phenoxybenzamine is a medication used for the treatment of high blood pressure and certain types of heart disease. It belongs to the class of drugs known as alpha blockers, and works by blocking the action of certain nerves in the body. Synonyms for phenoxybenzamine include dibenzyline, phenoxybenzylamine, and N-benzyl-N-(2-chloroethyl)phenoxyamine. These drugs are similar in their mechanism of action and clinical uses, but may have different strengths and side effect profiles. Alternative treatments for high blood pressure include lifestyle changes such as a healthy diet and exercise, as well as other medications such as diuretics and beta blockers.