My cardiologist has prescribed clonidine 0.1 to take prn when my systolic blood pressure goes above 160. It has happened to me twice in the last year. The first time it made me very dizzy and drowsy and i ended up sleeping the whole night. The second time, I felt dizzy and a funny feeling of being drowsy but not being able to sleep at all, all night, making me very tired. Tonight is another night that my bp is 165/90 and I have to take it. I m hesitant because of the lack of sleep the second time. Anything I can do if that happens? I m a 72-yr old female in generally good health. I do an hour of serious exercises 5 days a week. I m on Lisiniprol/HCTZ (10/12.5mg), Xarelto 20mg, and Metoprolol 25mg tid i do have a small aneurysm in the brain that my cardiovascular surgeon has said doesn t need any intervention. Normally my bp is kept between 120/75 -110/65 with the medication. I m not experiencing any more stress at this point than normal. The only difference now is seasonal allergies.