increase systolic blood pressure in comparison of diastolic pressure. that"s why inderall control systolic then diastolic in your case.
you are in stage 2 hypertensive - inderall is not good antihypertensive medicine , you should consult your doctor for other medicines to control BP.
other point is proponolol ( inderall ) is nonslective beta blocker
. longterm use cause many side effects. so you can take cardioslective beta blocker.