guilt as the reason to triple the dose
sometimes Gately wouldn't be able to stop himself before the debtor was reduced to a condition where he wasn't even going to be able to raise his head, much less funds, at which point not only did Sorkin have to write off the debt but the big kid Donny'd get so guilty and remorseful he'd triple his drug-intake and be no use to fucking nobody for a week.
Context
The feedback loop that keeps the using topped up: the remorse over what the ferocity does gets medicated with more of the thing, a week of tripled intake to not feel the guilt, which is the addict's real relationship to his substance — not pleasure but the smothering of an interior state. Even conscience becomes fuel for the habit; the worse he feels about himself, the more he uses, and the more he uses the less use he is.