My coworker talks frequently about his tolerance for painkillers. He has a prescription for... back/leg/nerve pain but it sounds like he adds on other meds by ingesting/snorting: oxycontin 80, opana, vicodin, xanax. Sometimes his behavior at work is strange. He forgets where he has put things or what he has said.

I am trying to understand where he is in his use/abuse. Where this path will lead him.

I am concerned for his health and safety.

Thank you