dam this thread is taking me back in time to when i first took my first opiate. man twas such a pleasant time, back when everything was simpler. i was just in high school at the time, and could not even perceive the wonders that opiates would bring to me in the near future..
my first time i did a 30mg roxicodone ( no apap). for me, personally, i wouldn't have gone any lower, since i seem to have a naturally high tolerance to most things. 25 mg would probably be a better place to start tho if you got those percs, just in case you are opiate sensitive ( i had a friend who was very sensitive once and he was puking violently for several hours).
and you'll be fine with the apap. u won't be taking near to close the amount that's dangerous. when i had percs i used to take at least 7 at a time when i was new to opiates, and let me tell you i used to have the best days man back when i was a freshman when i used to dose those. if i could go back in time i would.
a year and a half from that point i'm using needles to dose 120 mg of oxycodone at a time. i also began shooting dilaudid as well, along with other things. just giving you a warning for what chasing the opiate high can bring about eventually with enough time; i honestly never saw myself ever achieving this point in my life before i was 30 and i was only 20 at the time.
here i am now, almost 10 months clean from needles and opiates, and the only reason i'm taking a break is for a tolerance break and because money has gotten tight. i still have some oxy in my stash but i'm waiting for at least another month before i touch it.
just giving you a heads up of what might be in your future, cuz you sound like me 2 years ago. (sorry if my post makes no sense i'm pretty fuck'd )