Autism X-Linked 2, also known as intellectual developmental disorder, x-linked, is related to pettigrew syndrome and intellectual developmental disorder, x-linked, syndromic, hackmann-di donato type. An important gene associated with Autism X-Linked 2 is NLGN4X (Neuroligin 4 X-Linked). The drugs Guaifenesin and Cathine have been mentioned in the context of this disorder. Affiliated tissues include brain and testes, and related phenotypes are eeg abnormality and increased serum serotonin