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The most widely used illegal drug in the United States is?

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Marijuana
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The most used illegal drug?

The most illegally used drug today would be prescription pills. If someone is in possession of a prescription drug that is not theirs, it is the same as possession of a contro

What is the most widely used drug?

If you mean illegal drug then cannabis, weed, pot whatever you want to call it. Millions of people around the world smoke it on a regular basis.

What drug is the most widely used illegal drug in the US?

Marijuana is definitely the most widely used illegal drug in the US. Marijuana is the most widely used illegal drug.