It's not necessarily true about needing to be opiate naive to feel tramadol, i've found once I got the feeling for how opiates are after 2 years of doing them then I finally saw something in tramadol(Also have a 120mg hydro tolerance probably more now, and tramadol still works in the same doses I started with). I take 400mg and 100mg toppers, but I know my body well and all that, I'd try 200mg with an antihistamine and youll feel great. Tramadol also lasts a long time, often more than 12 hours for me off a single dose, so expect that