Metal Gear Solid Demo.....

Can you take a guys weapon?
the usp and stun gun arent exactly much fun to play with.
and what does that diazpham or whatever its called do?

No you cant take a guys weapon.
The diazepam is the tranquilizing drug that you take to lessen your shaking when you\'re firing in first person view mode so its easier to aim and what not.

One more thing, this should be in the hints/cheats/questions section.

Yeah, I don\'t exactly get why you\'d need diazpham for this demo although as shingoku indicated, your screen will be less "jiggy" by "using" the drug.  

As asking the particular question would lead me to believe, you\'ve apparently not played the PSX MGS game yet (or thru to completion).  If you had, then you\'d have found the drug to be most beneficial when you had the long-range sniper rifle.  Holding that puppy up and keeping it "still" was nearly impossible regarding squeezing off a successful round at an enemy b/c your (ie Snake\'s) breathing affected the "aim" of the gun up and down with each "breath".  Pretty cool!!!