yes they can and often are to control very high blood pressures in patients. I would say from ur list that may have already had a heart attack and that you heart is weakened. and certainly that you have uncontrolled or poorly controlled hypertension.
You sure can.
This question should be asked to your doctor, however. Whether this medication regimen is appropriate for you depends on many factors. Experimenting with blood pressure medications is dangerous... please ask your doctor.