You may need to take blood pressure medication for the rest of your life. But your doctor might be able to reduce or stop your treatment if your blood pressure stays under control for several years.
It's really important to take your medications as directed. If you miss doses, it won't work as effectively. The medication won't necessarily make you feel any different, but this doesn't mean it's not working.
Medications used to treat high blood pressure can have side effects, but most people don't experience any. If you do, changing medication will often help.