A friend crushes and snorts something called a "roxy" he claims it works faster and gets into his system in ten minutes as opposed to the 45 min. wait when taken orally.
Sure it does but it also means it doesn't last as long which means he will probably want more of it. He is also habituating his system to high sudden doses of the drug - not a good thing. He's also may be taking enough of this drug to induce a 'high' - which means he could be in danger of being addicted; the brain is at greater risk of addiction when given drugs in this way. Lastly, its actually illegal to do that.
The drugs are made to be taken in the manner indicated and they work the best that way.