Dont forget that the oral bioavailability is close to 90 plus percent. Nasally, its around 50-60 percent. Shooting is 100 percent. Taking it orally gets the most bang for your buck. it doesnt hit you like it does nasally, but it goes much further. It drives me crazy when I see people snorting oxies. Granted, there is a small rush, but you lose so much. Orally, it comes on slow but it lasts a long time.