Not in the pharmacological sense but they both can cause decrease in blood pressure and hence together cause hypotension.
It is possible that this is secondary to anxiety, panic or deconditioning, or even a persistent arrhythmia. I suggest that they start you on a medication called a beta blocker, or a calcium channel blocker to deal with the increased heart rate, then that you enroll in a light aerobic rehab plan to regain some lost fitness.