If I may make another suggestion, because I was thinking about this alot yesterday after my prior post. But I have done a lot of study into this. And Christian is right saying there are certain cases where pills are necessary, extreme bipolar, suicidal, etc. But through many different things I have done in this subject, schooling (psych), trial and error (on and off meds) more research, I have another suggestion i forgot to add. DIET, can play a majour role in brain chem and emotion. Example, I have a serious low tolerance to caffeine. By drinking on Timmies coffee, my ears would ring and id get massively hyper. But the caffeine crash sometimes would be unbearable, would send me into anxiety and panic attacks sometimes. Not getting proper nutrition ( and I know this is hard with cf, but trying the best you can) can play a majour role in how you feel. If you lack something you may feel tired, which in turn can make you feel crumby or intolerable. I know that things I had in my diet, too much caffeine, too much sugar etc., played a majour role in crashes, heres a big one NOT ENOUGH WATER can make you dehydrated and very crappy. I had to adjust my diet majourly, and it has also help ALOT! I hate water, but i force myself to drink at least 3 bottles a day. Cut caffeine, cause its an upper with majour crashes. Watch short sugars, example...orange juice drank by itself will cause your blood to jump in sugar then crash fast, make sure if you drink OJ to have something with it that has long lasting sugar or carbs to stop the crash. Every ones body works differently, but this is a big suggestion in helping depression.
chad 29 m cf(-)
p.s. In this case specifically, the original post said they were "feeling down" so I think there is hope to turn it around without meds. I hope some of this is helping.