Inclusion Criteria:  Participant of age greater than equal to (>=) 18. Participant with confirmed diagnosis (psychiatric disease of at least 12 months) of one or more psychiatric pathologies, including MDD, AD, BD and SUD. Participant attended in out-patient clinic. Participant who presents insufficient or inadequate response (who has received at least with two different treatments at minimum doses according to SmPC and with CGI-S score >= 4 [moderate ill]) to previous treatment. Participant capable of understanding and complying with protocol requirements, in the opinion of the investigator. Participant capable to fulfill the study questionnaires. Participant with English knowledge to complete the study questionnaires, if necessary. Participant or, when applicable, the participant's legally acceptable representative, who signs and dates a written informed consent form and any required privacy authorization prior to the initiation of any study procedures.  Exclusion Criteria:  Participant with previous ADHD diagnosis and/or who had received previous pharmacological treatment for it. Participant with diagnosis of schizoaffective disorder, mental retardation or other cognitive disorders. Participant with presence of psychotic symptoms during the current episode. Psychiatric disorder exacerbation, acute intoxication or psychotropic drug withdrawal syndrome. Participant with a serious and unstable medical condition. Participant who has participated in a clinical trial in the past 12 months (Clinical trial participation could be cause of bias regarding healthcare resource use data collection).