Plugging oxycontin, morphine and opana is the best way to get the most out of your pills. it comes on faster, goes higher, and lasts longer. My fiance thinks I am a nut but the shit works.
Use a pill crusher.
Add with 1 or 2mL water into spoon.
Draw back with an oral syringe.
Inject into anus.
No, merely putting the pill in your ass isn't going to have an effect as far as I know.
IMO, just eat the god damned things