13. Carfentanil
This is a drug that works like regular fentanyl, but it is 100x stronger. It is 1000x stronger than morphine. The drug contains a certain level of toxicity that affects humans even if it is available commercially. It is believed that it can be used as a weapon of mass destruction by terrorists and rogue nations. This drug is now available from many Chinese companies, and it was not a controlled substance in China up to 2017. Up to this time, it was being sold legally and could be bought on the internet.
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