I'm looking for some guidance on something...

If you know someone with mental illness and want to get them help what is the best way to go about it?

I think they accept that there is something wrong but not completely or fully explained the extent to their doctor. They've been provided pills by the doctor which basically put them in a vegetative state, I guess they've been provided without really having a real knowledge of what the person is experiencing at home. When taking the pills the person is helpless and it's horrible to see and they make no sense at all. The pills aren't helping and are probably making things worse.

Is it possible to contact their doctor to provide a more complete picture?