Personally, for me, I do find serving a domina (especially in person) excites me a lot and in the presence of such sexually charged excitement, negative moods naturally tend to go away. I have always seen bdsm sessions as therapeutic and not just a luxury.

Type in "russian whipping therapy" in Google and you will find interesting results. I have not read everything but there seems to be a lot to it.

There are many ways to treat psychiatric conditions including depression. There are gentler methods for people who are not into bdsm, of course.

Taking drugs is the worst. Half the time, it doesn't even work. It has been proven in some studies that medications actually increase anxiety, suicidal behavior, and homicidal behavior in people. The number one cause of gun violence in America is the use of psychiatric drugs, messing up people's brains -- not the gun itself (duh). Some people do respond positively to drugs, but they are never a good idea for the long term.