I would like to go out on a friday night but I take high blood pressure pills, will it do any thing to me.
No, no, no, it only makes your blood-pressure go up higher
No it weakens the desired effect of med which is to lower bp.
It depends on the medication you are on. Read the label, or ask your Dr. Or pharmacist if you have any doubts.
No it could be harmful...or for a good support you can ask to a doctor