Insanity mist

The victim who breathes the perfume released by this potion is put in a nervous state close to madness that often ends in suicide.
A creature subjected to this poison must succeed on a DC 14 Constitution saving throw or be poisoned. While poisoned in this way the creature's Wisdom score is reduced by 3d6 points. If its Wisdom is reduced to 2 or less, the creature suicides at the first opportunity.