Some people who take psychoactive drugs experience drug or substance induced psychosis. He later sought treatment for drug and alcohol addiction. Marijuana is the most popular illegal drug worldwide. Cocaine is the second most popular illegal recreational drug in Europe (behind cannabis). His episodes were symptomatic of alcohol and drug addiction. He suffered from years of drug and alcohol abuse. Heroin is classified as a hard drug in terms of drug harmfulness. Biden spent decades struggling with alcohol and drug addiction. Winehouse was plagued by drug and alcohol addiction. Its profits went to a program that helps musicians with drug and alcohol addiction. Bennington struggled with drug and alcohol abuse. Methamphetamine is another popular drug among distributors. These compounds may produce positive results for amphetamine on drug tests. It is available as a generic drug. Adderall has high potential for misuse as a recreational drug.