Vasoconstrictors are a type of drug that helps to narrow blood vessels and increase blood pressure. These drugs are commonly used in the treatment of conditions such as shock, low blood pressure, or as a local anesthetic. Although widely known as vasoconstrictors, they have other names too. These synonyms include pressor agents, adrenergic agonists, or sympathomimetics. Each name describes their effects on the body and how they work to regulate blood pressure. Pressor agents refer to their ability to increase blood pressure, adrenergic agonists describe their interaction with the sympathetic nervous system, and sympathomimetics describe their function in mimicking the effects of the sympathetic nervous system.