There is limited literature available on the comorbidity between autism spectrum disorder (ASD) and substance use disorder (SUD). This paper reviews existing literature and exemplifies the challenges of treating this population with a case report of an adult male with ASD and DSM-5 alcohol use disorder. This review and case study seeks to illustrate risk factors which predispose individuals with ASD to developing SUD and discuss the obstacles to and modifications of evidence-based treatments for SUD. A review of the therapeutic interventions implemented in the treatment of this young male are described to highlight potential recommendations for the general management of SUD in those with ASD.