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ADHD is a risk factor for the development of substance use disorders (SUDs), particularly if ADHD is untreated and, people presenting with SUDs have an increased risk of having ADHD (Groenman et al., 2013; van Emmerikvan Oortmerssen et al., 2012) (see also (Faraone et al., 2021; Ozgen et al., 2020).

People with ADHD are almost three times more likely to be nicotine-dependent and 50% more likely to develop a drug or alcohol use disorder than individuals without ADHD (Lee, Humphreys, Flory, Liu, & Glass, 2011). Evidence also shows there is an increased prevalence of ADHD in those presenting with primary SUDs compared with the prevalence of ADHD in the population (van Emmerik-van Oortmerssen et al., 2012).

It is important for clinicians working in addiction settings and those working with people with ADHD, to be aware of the overlap including how to identify, diagnose and provide treatment and support to people who have both conditions.

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