Yes, it could help. There is an opinion that dsc could help with fear extinction, reducing that fear, anxiety which prevents you from social engagements. Also it could enhance the effect of cbt (cognitive behavioral therapy) and has an ability to make positive social experience to stay longer in your memory.
D-cycloserine for an. It works as a cognitive enhancer to relieve symptoms.
Not sure if. You are asking an historical question or about it's effectiveness. Can you ask again?
Cycloserine. No. No proof it works.