In this Yale study as many as 35 per cent of cocaine users who presented for treatment met the diagnostic criteria for childhood ADHD.1 In another study, as many as 40 per cent of adult alcoholics were found to have underlying attention deficit (hyperactivity) disorder.2 People with ADHD are twice as likely as others to fall into substance abuse and nearly four times as likely as others to move from alcohol to other psychoactive drugs.3 People with ADHD are also more likely to smoke, to gamble and to have any number of other addictive behaviours. Among crystal meth addicts a significant
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