His eyes widened before he could stop himself, before he could remind himself that he wasn't wearing his sunglasses to hide it. He wondered how she knew. Maybe she recognized something in his voice like he recognized something in hers.

"Med-X," the lie came quickly. Med-X was an almost respectable drug; it was a drug with respectable, practical uses, with the downside of being habit-forming. Not like the shit he'd been on. There's nothing respectable about Psycho. "It's a painkiller. Got into too many skirmishes as a caravan guard, dipped into the medicine kit too many times after getting shot in the leg or a baseball bat to the chest..."

Nothing about that story was true, but it was a nicer story than the truth so he'll try to pass it off as truth.