The ARCHIVES article by Barbaresi et al1 summarized their analysis of the scientific literature related to autism to help guide treatment recommendations made by primary care pediatricians. They conclude that specific behavioral interventions and psychopharmacologic agents have sufficient evidence for recommendation, but that other treatments, particularly complementary treatments, do not warrant consideration without evidence from double-blind, placebo-controlled, randomized, clinical trials.
Kelly A, Kemper KJ, Rosen LD. The Role of Pediatricians Who Care for Children With Autism. Arch Pediatr Adolesc Med. 2007;161(4):416–418. doi:10.1001/archpedi.161.4.416