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If you’re interested in this episode, you may also like ‘Our problem with drugs’ /sounds/play/m0029hch Scotland’s drug supply is getting more and more dangerous, according to Dr Lorna Nisbet (pictured) of Dundee University's Leverhulme Research Centre for Forensic Science. That’s because a new type of synthetic opioid, called nitazenes, are flooding the market. Five hundred times more potent than heroin, a single grain can kill. Martin Geissler speaks to the �鶹��’s James Cook about the criminal gangs making these drugs, and how law enforcement struggles to keep up. Scotcast is the �鶹��’s Scottish news podcast. Get in touch: scotcast@bbc.co.uk