I've talked to people with anhedonia that they feel may be a result of permanent brain damage. These people have been of medication for over a year or so and their still waiting to get their emotions back. I feel the same sever anhedonia but I got it from anti-psychotics it seems most people have got it from anti-depressants. It's the type of feeling where you want to die but for some reason you can't take your life because you're afraid of the after life many people have said that. These people are being tortured. They only can hope that one day they will be healed. It's such a rare type of side effect that it's not even listed as a possible side effect. Doctors don't even know what it is, I had to find out online what the possible damage can be done and how long you have to wait after you get off meds for your emotions to come back. It's horrible.