What should I expect from the medication CLONIDINE?

Ive been prescribed Adderall XR for a little bit now, and all of the sudden my doctor prescribes me "clonidine." I researched it online and such (yet still unsure), but my question exactly is, if i take one of these 0.1 mg. pills, what will i feel like PHYSICALLY? Tired, drunkenly, wired, twitchy, happy? none of the above? I don't like to be surprised with things like this. Anybody know?