JWH-018 works orally. I don't know how you would go about extracting it efficiently from those smoking blends, though. As chainer said - pure JWH-018 can simply be taken orally for long-lasting effects similar to oral THC. I actually much prefer it orally to smoked; it lasts longer, doesn't have that anxious edge to it and I find it closer to the effects of actual weed that way.