Clonidine
high blood pressure
"This is a very effective medication but with extreme side effects. It is very short-lived and requires dividing the prescribed dosage into 3 times a day to avoid blood pressure spikes. It leaves you feeling "high" and sedated. Absolutely do not discontinue it abruptly. Stopping it abruptly causes your blood pressure to rebound even higher than it was before for several days.

A better choice in this class is Guanfacine, which for me is even more effective and does not have the radical side effects."