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Table 2 Selected lifetime nonmedical use of prescription and illicit drugs, ADHD diversion study, National Survey of Drug Use and Health, 2005

From: The nonmedical use of prescription ADHD medications: results from a national Internet panel

  Lifetime Use
  2005 Diversion 2005 NSDUH   
  n = 4,297 n = 32,104   
  %a SE %a SE P b ESc
Illicit Drugs       
   Marijuana 57.54 1.87 53.66 0.54 0.05 0.078
   Cocaine 23.47 2.01 20.23 0.37 0.11 0.081
   Methamphetamine 8.63 1.50 5.83 0.21 0.06 0.119
   Supravald 0.11 0.05     
Prescription stimulants e       
   Prescription diet pillsf 3.95 0.90 3.46 0.15 0.59 0.027
   Ritalin or methylphenidate 4.20 0.76 2.67 0.12 0.05 0.095
   Cylert or pemoline 0.31 0.10 0.08 0.03 0.03 0.081
   Dexedrine, Dextrostat, or Dexampex 1.67 0.65 0.75 0.06 0.16 0.107
   Dextroamphetamine 0.67 0.26 0.20 0.03 0.08 0.105
Prescription stimulants e       
   Preludin or phenmetrazine 0.49 0.25 0.16 0.03 0.20 0.083
   Any Adderall 2.06 0.21 n/a    
Adderall 1.58 0.19 n/a    
Adderall XR 0.80 0.14 n/a    
   Concerta 0.87 0.30 n/a    
   Any ADHD stimulantsg 7.01 0.87 n/a    
ADHD Nonstimulants       
   Modafanil 0.42 0.24 n/a    
   Strattera 0.53 0.25 n/a    
Any ADHD medications h 7.07 0.87 n/a    
  1. ADHD = attention deficit hyperactivity disorder; n/a = Estimate not available from the 2005 NSDUH; NSDUH = National Survey of Drug Use and Health.
  2. a Weighted to the U.S. population of noninstitutionalized civilian adults aged 18 to 49.
  3. b P value derived from chi-square test in SUDAAN.
  4. c Effect size, determined by the difference in prevalence estimates between the 2005 Diversion Study and the 2005 NSDUH. In the social sciences, an effect size is considered to be "small" when it is about 0.10, "medium" when it is about 0.30, and "large" when it is about 0.50, based on Cohen's d (1988) [32].
  5. d Fictitious drug used to assess reporting bias.
  6. e Nonmedical use.
  7. f Examples given in both studies were amphetamines, Benzedrine, Biphetamine, Fastin, or phentermine. Because some of these medications may be used to treat ADHD (e.g., amphetamines), respondents in the 2005 Diversion Study who reported lifetime nonmedical use of "prescription diet pills" were subsequently asked separate questions about nonmedical use of (a) amphetamines; (b) Benzedrine; (c) Biphetamine; (d) Fastin, or phentermine; or (e)some other prescription diet pill.
  8. g ADHD stimulants referred to any of the following: amphetamines or dextroamphetamine (including any form of Adderall, Biphetamine, Dexedrine, Dextrostat, or Dexampex); any form of methylphenidate or dexmethylphenidate (including Ritalin, Concerta, Methylin, or Focalin); or Cylert or pemoline.
  9. h Nonmedical use of any ADHD stimulants or nonstimulants in the period of interest.