The OC's are but the OP's are really hard to grind down, but possible. Protip: When sniffing ER opiate pills it's best to make 6 small lines of your dose and sniff 1 up each side of your nose at a time, spreading out the times by like by like 15-20 minutes in between. This gives the oxy time to be absorbed much faster than if you do one large line. The oxy will absorb faster the smaller the amount sniffed, if you put a bunch up there at once it's all gonna glob together and the time release will kick back in, but most of the oxy will get absorbed before the gel starts to take place.