For Attention Deficit/Hyperactivity Disorder (ADHD) youth transitioning from child to adult services, protocols that guide the transition process are necessary. While some guidelines are available, they do not always consider effective workload and scarce resources. In Italy, there are currently very few guidelines available, and they do not adhere to common standards, possibly leading to a non-uniform use. The present study analyzes 6 protocols collected from different services for ADHD patients that took part in the TransiDEA (Transitioning in Diabetes, Epilepsy, and ADHD patients) Project. Their content is described in parallel to the National Institute for Clinical Health and Excellence (NICE) guidelines. While there are some strong points and several common core elements, a need emerges to standardize practices and to make them more adherent to patients’ needs and to the resources available to clinicians.