*smiles* Drug user, yes. Drug addict, no. He'd be considered something of a new age hippie. Trying certain drugs with relaxing or hallucinogenic properties to get into a nice proper zone to lay down tracks. It's certainly something that can be cleaned out, but the profile for a character like this is fairly to the point. He has absolutely nothing to do with the original science project that created the wormhole, just being a poor bastard along for the ride. I can flesh out the "what he did before" kinda history, if you want. That's no biggie.