Arthur Wright
Arthur Wright answered

Hate to tell you this but traces of any meds we put into our body can show up in a drug test months later but tests cant seperate one med from another so the Oxy will over take the other but if asked , tell the truth

Michael Lebowitz
Michael Lebowitz answered

Hair labs use extensive washing procedures that rinse out external contamination that might occur from 2nd hand smoke. These washing procedures are delicate enough to make sure that actual toxins deposited into the hair through the bloodstream are not washed away.

Read more here Hair Drug Test 2nd Hand Smoke