Dear Doc, My mother has been taking atenolol for a couple of years now. About a year ago, her bp was 210/108 suddenly, so we brought her to the emergency, as she was feeling fatigue and dizzyness. The EKG , blood test and vascular test was all normal, and she was send home. Her doctor increased her atentolol dose from 25mg to 50mg, and also started her on conversyl 4mg. Even with these medications, she still continued to have couple of these episodes for the last year, and again 4 nights ago. All the test showed nothing, I am really worried for her, as currently her bp has been varying between 150-176/81-92, and has been for the last couple of days. Is there other tests that her doctor could request that will help determine what is causing these high bp episodes? Should she ask her doctor to change the meds?