Hydralazine is a medication that is used to treat high blood pressure. However, there are several other synonyms that can be used to refer to this drug. Some of the most commonly used synonyms include apresoline, dilatol, hydral, hydrapres, hydralax, hydralazine bitartrate, and hydralazine hydrochloride. Each of these names refers to the same drug, which works by relaxing the blood vessels and reducing the workload on the heart. While hydralazine has been used for many years, it is important to consult with a healthcare professional before taking it to ensure that it is safe and appropriate for your unique health needs.