I recently had carotid surgery on both left and right side plus bypass artillery - artillery - - I have never had high blood pressure and after first surgery I couldn t go home because of low blood pressure; with second carotid surgery blood pressure was very irregular, high, low , high, low, etc. My cardio dr. gave me 25mg of metoprolol tartrate 3 times daily even though I have never had chest pain or a history of high blood pressure. Now I have diareria, which I cannot handle as right before I had surgery I had an upper stomach bleed.