Merge the potions of booze and confusion together, because booze is basically just a weaker form of confusion that also has a minimal amount of nutrition. It’s not certain which way they should be merged: deleting booze and favoring confusion has the advantage that monsters can still flavorfully throw it at you in order to cause confusion (you don’t get instantly drunk from being splashed with booze), but deleting confusion and favoring booze is attractive because it’s a more flavorful item in general, what with having a dual confusion/nutrition effect, being nonmagical, contributing to levels like the Wine Cellar, etc.

Darts can be dipped in several different potions besides sickness to get different effects. Blindness, hallucination, sleeping, confusion, etc. Implementation-wise, this can be done by overloading the corpsenm flag on ammunition to indicate which potion it’s been dipped in.