Taking some antihistamines beforehand will reduce the itch. Older ones like benedryl that have central effects will intensify the nod. Newer ones like zyrtec won't but need to be taken at least two hours prior to have any effect.
Zyterc never works or my itch

I always end up taking benny too. It does make me nod more, but I like it.. I can sit there with my eyes closed and not fall asleep(most of the time). I'll just be sitting there thinking, 'Mann.. I feel greaaaaaat.'.
What do you consider a high dose of oxy, duck? 30mg ish?
I never really go passed that unless it's been a few hours or I've been doing it daily.
Taking 10-15mg sets me in a perfect, wanting to do things, mood. I work better, talk better, play music better, listen to music better, sex better..
Really regardless of the dosage those are true.. Haha except work kind of sucks. I've been in the bathroom on too much thinking 'Man, just if I close my eyes for one.. Second..*nod* NO' *flushes toilet and runs away from situation*
That shit doesn't work in the car though. Coffee fixes everything usually.