I understand there are many jobs where the use of medication for pain would cause a decrease in safety. Most of these medications have warning labels to that effect and many places of employment will not allow its employees to operate certain equipment while under the influence of these medications (marijuana would likely be included in this category). If a worker is working in an office environment and able to fulfill their job duties while on prescribed marijuana, I think we should let them (unless the company does not allow workers to work while on certain pain or mood altering drugs; morphine, codeine …). If the worker is “spacey” or unable to focus, then disciplinary action should be taken just like it would be taken with someone not on medication (or performance evaluations should be made and placed in their file.) If safety becomes an issue, the employee should be dealt with like any other employee who has become unsafe.

Your topics seem to direct blame towards workers rather than addressing & correcting the real root causes.