According to the 2015 National Survey on Drug Use and Health, is the most commonly used illicit drug.

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According to the 2015 National Survey on Drug Use and Health, marijuana is the most commonly used illicit drug in the United States. It is followed by the non-medical use of prescription drugs such as pain relievers and stimulants. Alcohol and nicotine are legal substances, while cocaine is a less commonly used illicit drug compared to marijuana.