Why would you be concerned about other people's health issues and medications? Depression can seriously affect someone's ability to function and untreated depression can potentially be fatal.
If they are sick and they take their meds as prescribed, more power to them and even if they are out there getting high like kites, what is it to you and your personal sobriety? Live and let live.
Ps:
Be careful that it is not your AV trying to tell you that no one is really sober in AA and since everyone is full of it you should stop going to meetings and it s ok for you to smoke a joint or have a drink.