Proposed by the EPA Section on Neurodevelopmental Disorders Across the Lifespan (NDAL)Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterised by persistent difficulties in social interaction and communication, as well as restricted interests, stereotypic behaviours and resistance to change. The prevalence of ASD in the general population is around 1%. The studies have shown that adults with ASD experience significant disadvantage in employment, social relationships, quality of life. But unfourtunately, adult providers having less knowledge of ASD, possible differences in ASD presentation in females, and inaccurate diagnosis due to misattribution of ASD symptoms to another psychiatric disorder. Another complex issue is the group of later-diagnosed adults, who sometimes is referred to as “the lost generation”, as they were children during a time when autism was more narrowly defined and thus were not identified when young. There is a real need to increase the knowledge of autism focused on adults, particularly on diagnosis and how best to support autistic individuals as they transition into and move through adulthood. The Neurodevelopmental Disorders Across Lifespan section of EPA proposes to organize a course on ASD in adults in order to improve the knowledge among clinicians and the quality of servicies for adults with ASD. We will organize 4 lectures with European experts on this topic , dividit in two blocks. The first block will include 1)Introduction to ASD and 2) Diagnosing ASD in adults. The second block will be centered on treatments, 3) Pharmacological treatment and 4) Psychological treatments. In each block we will have 30 minutes for practical cases and questions.