guanfacine ER

Guanfacine ER (Intuniv) can lower your blood pressure or heart rate, which can cause you to feel faint and dizzy. You're more likely to experience these side effects when you first start guanfacine ER (Intuniv) and when your provider raises your dose. Because of this, your provider will monitor your blood pressure and heart rate regularly while you're receiving treatment, especially if you're taking blood pressure medications. These side effects should lessen over time. Talk to your healthcare provider if you continue to feel dizzy, tired, or run out of breath easily after using guanfacine ER (Intuniv).

Guanfacine ER (Intuniv) lowers your ability to focus, think, and react for the first few days until you get used to it. Be careful and avoid activities that require you to be alert, such as driving a car or operating machinery, until you know how this medication affects you. Talk to your provider if this doesn't go away after a few days.

If you have been taking guanfacine ER (Intuniv) for a while, stopping it suddenly can cause a "rebound" effect and lead to high blood pressure. Some other rebound symptoms include headache, fast heart rate, nausea, chest tightness, or feeling nervous or anxious. Try not to miss any doses and don't stop taking guanfacine ER (Intuniv) without talking to your healthcare provider first. They'll help you get off this medication slowly and safely.