Hi thanks for contacting HCM... Noted here you are having high blood pressure and taking drug for it. So first your blood pressure needs to get controlled. You have not mentioned it... If it is very high sodium nitroprusside given to control it... If hypertension is long term and not under control then Heart failure like cause searched for...It can lead dizziness as brain not getting enough oxygenated blood. If you have tremor or slurred speech stroke look for.CT scan useful for it. For cardiac causes ECG or ECHO useful.. If no cardiac causes present then it could be simple hypoglycemia or inadequate sleep etc can be cause. Leg elevation needed... Rule out anemia also... If it is continuous deterioting then CT scan needed. Take care.