I heard back when they had the old K-8s,k-4s, and k-2mg dillies you could just cold shake em. Throw em in a rig, shake it up and shoot. Although you wouldn't catch me doing that. I don't imagine it is too great for you with the binders and fillers and all. I have been using drugs IV for quite a while now, and never have I not filtered a shot. I mean at least use a q-tip cotton or a cigarette filter if your slamming pills, and I always had great results with cold-cool water prepping up dilly, and really all pills for that matter. It isn't good to heat water when prepping pills because it can cause the inactive ingredients(binders, fillers, etc) to be dissolved in with the good stuff in the pill that you actually want, and you don't want to be shooting all that other shit into your veins, especially on a regular basis, if you don't have to. DON'T HEAT PILLS FOR IV!!! MScontin might be an exception for that rule, as it is a real bitch to prep with just cold water so I've heard from friends, but haven't ever tried ER morphine iv, just the IRs.