Paulie Cantelli

 helps run the chem shop A Quick Fix in Rivet City, but he is normally seen roaming around anywhere Rivet City.

Unmarked quest: Overdose
He is addicted to Psycho, but his wife does not let him take any out of the inventory and he is too poor to purchase any himself, so he begs for the drug. If you have Psycho in your inventory, you can give it to him for negative karma. After you give him the psycho, he'll die, apparently from an overdose.

Quotes
"Wanna do some buffout? Maybe a little psycho?"

Appearances
 only appears in Fallout 3.