Alpha blockers work on the nervous system to relax the blood vessels, allowing the blood to pass more easily. Alpha-beta blockers work the same way alpha blockers do but also slow the heartbeat so less blood is pumped through the vessels. Nervous system inhibitors relax blood vessels by controlling nerve impulses. Vasodialators open blood vessels by relaxing the muscle in the vessel walls. Possible side effects.
Side effects can occur with any drug.
Even aspirin sometimes causes stomach problems. Some high blood pressure drugs may make you feel tired or sleepy or cause you to have a rash or a cough. The important thing is that you pay attention to how you feel. And, if you have a side effect, don t stop taking your medication that can cause trouble. Tell your doctor about the problem as soon as possible.