What does it mean when beta blockers make your blood pressure go up? prescribed for svt, but cause nausea and now normally low blood pressure is high

Beta Blockers: Generally speaking beta blockers have a blood pressure lowering effect and act as an hypertensive medications. This is an addition to their primary effect which is to slow heart rate. To cause an increase in blood pressure would be unusual. I suspect the elevated blood pressure and nausea or not related to the medication itself. Definitely warrants a visit to your doctor.