[neverdem]

Um, isn't marijuana use illegal there?

I haven't kept up with the thread, but I thought the question was impairment. If it's not a question of actual impairment, what about the metabolites of prescription drugs and their potential adverse effects?

[OmahaFields]

I haven't kept up with the thread, but I thought the question was impairment.

No. The issue is that ingesting marijuana is illegal. Nothing about impairment.