It feels like a tragic anachronism: more than 30 years after heroin use first exploded in Scotland, leaving thousands of broken lives in its wake, drug-related deaths reach an all-time high, with 60% of them among the over 35s.

With policy-makers' attention increasingly focused on how to tackle alcohol-related problems, it is a painful reminder that drug misuse remains a pressing problem and that the legacy of Scotland's historical drug problem is still being felt.

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