Spells to enhance poisons

[Fortinbro]

I'm looking for spells that do things like cause an incubating poison to trigger instantly. Is there anything like that available?

[The Viscount]

I don't know of any spells that do it, but Lolth's Caress is a feat that lets you burn rebuke attempts to trigger the secondary poison effect in creatures within 20 feet.

[Spore]

If Pathfinder is allowed: Accelerate Poison (http://paizo.com/pathfinderRPG/prd/advanced/spells/acceleratePoison.html#_accelerate-poison)