I am taking metoprolol tartrate (50 mg 2 x a day) and enalapril maleare 5 mg 1 x a day). I have recently begun to develop numbness in my lower arm and hand, when sleeping at night. Just wondering if this drug might be a cause. Also, I have just begun to occasionally feel a light headedness when getting out of a chair, or getting up after laying down on a couch. Any information would be appreciated. Thanks!