If you get your hydro pure its fine of course. Otherwise you'll need whats known as a wheel filter or submicron trapping filter paper. Its really a pain to take say 6 vicodin, about 6,000mgs of material & get it down to even a CC without signifigant loss.
Snorting- to the extent that the insuffalated material does not drip down into your stomach is advantageous for some things, it bypasses stomach acids, enymes, stomach lining enzymes and of course everything from the stomach heads through the portal vein to the liver for whats known as first pass metabolism. That said, the olfactory mucosa does have quite a bit less surface area & so is useful for only smallish amounts of powder.
I was told by a board certified neurologist that insuffalated buprenorphine (opiate) is signifigantly more reinforcing via this route. Take a look at a cross-section of a head, the top of the nose is practically in the brain. I suspect it acheives somewhat initially higher concentrations here.