The deposed President Bashar al-Assad has been linked to the multi-billion dollar trade of a narcotic called Captagon. Syria's new rebel leaders have promised to stamp it out. So what will it take to end the country's association with the drug? Presenter Caitríona Perry speaks to the BBC's Emir Nader, who has been reporting on the drug trade in the Middle East.

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Producers: Peter Goffin and Eleanor Sly

Sound engineers: Mike Regaard and Jonny Baker

Assistant editor: Sergi Forcada Freixas

Senior news editor: China Collins