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Table 4 Most Common Substance Combinations (N = 69,891)

From: Mono- versus polydrug abuse patterns among publicly funded clients

Substance Combination n %a
Two substances (n = 20,789; 29.8%)   
   Alcohol, Cocaine 8,374 12.0
   Alcohol, Marijuana 5,182 7.4
   Cocaine, Marijuana 2,371 3.4
   Alcohol, Opiates 916 1.3
   Cocaine, Opiates 593 0.9
   Amphetamines, Marijuana 449 0.6
   Opiates, Sedatives 445 0.6
   Alcohol, Sedatives 429 0.6
   Marijuana, Opiates 395 0.6
   Alcohol, Otherb 282 0.4
   Alcohol, Amphetamines 260 0.4
   Marijuana, Sedatives 187 0.3
   Cocaine, Amphetamines 159 0.2
   Marijuana, Otherb 104 0.2
   Combinations with n < 100 643 0.9
Three substances (n = 10,711; 15.3%)   
   Alcohol, Cocaine, Marijuana 6,202 8.9
   Alcohol, Cocaine, Opiates 663 1.0
   Alcohol, Marijuana, Sedatives 483 0.7
   Alcohol, Sedatives, Otherb 430 0.6
   Alcohol, Marijuana, Amphetamines 388 0.6
   Alcohol, Opiates, Sedatives 327 0.5
   Alcohol, Cocaine, Sedatives 275 0.4
   Cocaine, Marijuana, Opiates 241 0.3
   Alcohol, Cocaine, Amphetamines 167 0.2
   Marijuana, Opiates, Sedatives 153 0.2
   Cocaine, Marijuana, Amphetamines 151 0.2
   Cocaine, Marijuana, Sedatives 129 0.2
   Alcohol, Marijuana, Otherb 125 0.2
   Alcohol, Cocaine, Otherb 118 0.17
   Cocaine, Opiates, Sedatives 118 0.17
   Combinations with n < 100 741 1.1
  1. aPercentages are based on the entire client base and not just those abusing two or three substances.
  2. bOther refers mostly to club drugs, such as ecstasy, GHB, Ketamine, and Rohypnol.