There are a lot of chronically ill people who require multiple medications to function. I am actually in recovery, so perhaps better versed on addiction as a concept, and I am sure you would be horrified that in order to ride and then be able to walk afterward, I routinely take several medications. (None of which are mind altering) It also doesn’t shock me that someone who has worked overnights all week falls asleep in their dinner the following day.
Perhaps if you are running a million dollar business, and are genuinely examining your role here and how you could do better, you might consider offering your employees paid medical leave, workmans comp for work related injuries, and health insurance, so that if someone has chronic pain as a result of or exaccerbated by repetitive motion on the job, they can take time off to heal and go to the doctor rather than get handed some animal medication from their boss and told to get back on the ladder. Don’t worry, you weren’t the only person at that horse show giving someone substances so that they would continue performing in a way that fulfilled your need of them, but it might be worth considering as a business owner whether providing some kind of employee benefits might have prevented someone being in that position.
This isn’t your first time calling someone who manages their chronic medical condition in a way you find distasteful a drug addict, so it may also be worth attending a nar-anon meeting or two to educate yourself on the topic if you find yourself with time off. I found 12 step programs to be really importand for my emotional growth, personally, and think almost anyone can benefit from attending and learning to approach the world through that lens.