Initial confusion eventually giving in to crippling paranoia and a crazed urge to keep one ' s back to the wall ? <| sep |> You could go the other option . If you don ' t want to harm her and you have to see her at any point and she tries that shit again just start mentioning that you seem to have misplaced some meds , naturally she will deny it because she is a POS , but you act relived that she because the pills that are missing are actually a powerful laxative and taking too many at a time could cause internal bleeding and put someone in hospital ! Basically if it happens again spin a lie and let her sweat , while not actually killing her . I actually know someone who did put laxatives in a bottle of pain pills for a light fingered coworker , but I wouldn ' t recommend that as an option .