Sounds to me like you are trying to address a panic / anxiety issue from the pills as a cardiac event. Happenned to me also - How many of what pills were you doing? And what is your cardiac history? You must have one if you've got nitro around - although the nitro also comes in transdermal patches -- -- - Breathing exercises work well for the panic / anxiety stuff ....
First if you have heart issues, you need to check with your cardio doc before putting your self through this. Dropping to the floor from this is not good. I think first, you need to face the addiction, and with the pain there are other no Narc's to be give in.
i would say find a good pain managemnet dr. i have been on pain meds for 3 yrs now, i know i am pysically addicted but i take them as perscribed and i can live a half way normal life. without my meds i would be in real trouble i have 4 herniated disc and could hardly move without meds. it is tough postion to be in,, need meds or be in pain.. i made the decision to not be in pain