It seems unlikely that you would get in trouble. My Dr. tested me for drugs at my first few appointments and has tested me more recently. Unless you have also been using it you couldn't get in trouble. I agree with geekmom, she really needs to talk to her doctor.
Sɧҽ ŋҽҽɖى tɷ ɠҽt ɷŋ a pɾɷɠɾam aىap ʆɷɾ ىųbųtҽҳ
She needs to have an honest conversation with her doctor. But that's her responsibility, not yours.