As used in this chapter, "drug-drug interaction" means an occurrence in which at least two (2) drugs taken by a recipient leads to clinically significant toxicity that:

1. (1) is characteristic of one (1) or any of the drugs present; or
2. (2) leads to the interference with the effectiveness of one (1) or any of the drugs.

As added by P.L.75-1992, SEC.19.