Indiana Code Title 34. Civil Law and Procedure § 34-24-4-8

Sec. 8. (a) An action by an individual drug user brought under this chapter (or IC 34-1-70 before its repeal) is governed by the principles of comparative liability under state law.  Comparative liability attributed to a plaintiff does not bar recovery but diminishes the award of compensatory damages proportionally according to the measure of responsibility attributed to the plaintiff.

(b) The burden of proving the comparative liability of the plaintiff:

(c) Comparative liability may not be attributed to a plaintiff who is not an individual drug user.