Key takeaways
Clonidine (Catapres, Nexiclon XR) and Prazosin (Minipress) are both medications used to treat high blood pressure, but they work differently and have distinct characteristics. Clonidine is an alpha agonist that lowers blood pressure by reducing the activity of stress hormones in the brain, which slows down your heart rate and relaxes blood vessels. It comes in various forms, including oral tablets and a topical patch, and is available as a generic. Prazosin, on the other hand, is an alpha blocker that works by directly relaxing blood vessels to improve blood flow. It is taken orally, typically 2 to 3 times a day, and is also available as a generic. Clonidine can cause "rebound hypertension" if stopped suddenly and is not recommended for older adults due to the risk of falls. Prazosin can cause dizziness and fainting, especially when you first start taking it or when your dose is increased. Additionally, prazosin is sometimes used off-label for PTSD-related nightmares, while clonidine is occasionally used off-label for hot flashes. Both medications can cause drowsiness and should not be mixed with alcohol.
