“…Indeed, studies have shown a relationship of staff‐related factors, that is, staff's knowledge of psychotropic drug use and cognitions and attitude towards challenging behaviour with the likelihood of the use of psychotropic drugs and severity of behavioural symptoms of clients (Hastings, ; Lambrechts, Kuppens, & Maes, ; Singh et al., ). Moreover, studies have shown that support professionals’ knowledge of psychotropic drugs is often insufficient, that their expectations towards the effects of antipsychotics are frequently unrealistic, and that they often lack sufficient knowledge regarding the possible side‐effects of psychotropic drugs (Fretwell & Felce, ; de Kuijper & van der Putten, ). Support professionals indicate that they are in need of more knowledge on the effects of psychotropic drug use in clients with intellectual disability (Donley, Chan, & Webber, ; de Kuijper & van der Putten, ).…”