Bring Iverron's Antidote to Iverron before the time limit is up. Iverron can be found by the cave to the north.
The antidote is ready, [player]. Please see that Iverron drinks it.
There is something that you should know -- the antidote -- it will only remain viable for 5 minutes. You must get it to him in time.
Speed be with you, [player].