it depends on the formulation and the fillers/binders. but don't shoot it, there is no rush accompanied by this roa. I've shot oxy on numerous ocassions and always reached the conclusion that oral is the best way to go at it.
if you want a faster onset (which can be similar to a rush, but it's not a rush) you can snort it. but this way you are wasting it, because oral has higher bioavailability and it lasts much longer than snorting. so it will give you the illusion but it will go away fast.
if you got a needle fixation, just shoot sterile water from ampoules from a needle exchange/pharmacy (definetly not tap water). shooting pills is dangerous because of the fillers and binders, micron filters minimize the risk but don't eliminate it completly.
just swallow the pill as it is or chew it or crush it and parachute the powder with a little piece of rolling paper/toilet paper/paper towel. I preffer the chewing method with the ER formulations, but with the IR you don't have to make it complicated, just swallow and enjoy.