17 Countries with the Biggest Drug Problems in the World

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2. Iran

People treated for drug abuse per million: 14,191.7

Just like Afghanistan, Iran has one of the biggest drug problems in the world and heroin abuse is on the rise, making 67% of drug consumption in Iran. According to some estimates, 2.2 million (2.75% of the population) are drug addicts.

17 Countries with the Biggest Drug Problems in the World

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