I am not on any medication,but I can relate.I never considered myself as having sense of humour, but people told me I was.I cracked jokes on myself and made people laugh.Recently one of my cousin told me he stopped visiting my parents after I moved out because there was no fun anymore.I was surprised at couple of comments he made.He compared me to one of the famous comedian and a to a beautiful Hollywood actress.I came home and watched myself in the mirror and horrified to see myself.My face looked like I have just had facial palsy.I couldn't smile anymore.I couldn't laugh either.I haven't done so in ages.I am putting much effort to smile and it hurts physically.But I am hellbent to do it.I am watching comedies.I like Mr Bean.I am smiling at myself in the mirror and my jaws hurt less now.My face is returning to its normal look.Please put time and intent into smiling even if you don't want to.