i agree, definitley save the weed for when the oxy wears off, it ruins the high, some people just do this stuff to get "fucked up" though and will take multiple different pills, smoke weed, drink, etc, oxy is best taken alone, without a doubt
if you dont weight that much start out with 10 MG and then wait 40 minutes and see how it feels, then re dose, if you weight like 165-200 then maybe you should try 20, just eat them btw, dont rail them unless they are the tiny brand name OC without any tylenol