There is an article posted here that says he was on Fanapt, a schizophrenia drug. I found it buried in the article and posted about it in the thread.
Psychiatric side effects including restlessness, aggression, and delusion have been reported frequently. Hostility, decreased libido, paranoia, anorgasmia, confusional state, mania, catatonia, mood swings, panic attack, obsessive-compulsive disorder, bulimia nervosa, delirium, polydipsia psychogenic, impulse-control disorder, and major depression have been reported infrequently."
“There is an article posted here that says he was on Fanapt, a schizophrenia drug. I found it buried in the article and posted about it in the thread.”
http://www.freerepublic.com/focus/news/2969335/posts?page=1
http://www.nydailynews.com/news/national/nancy-lanza-feared-son-adam-worse-article-1.1221505
Neither link mentioned fanapt when I tried to find it.