African Perspective

(Audio is updated every Saturday at 2106GMT)

It's hard to associate the spice islands with extensive heroin use, but over the past two decades, a serious drug culture has gripped Zanzibar.

The BBC's Freddie Boswell enters into this world of unga or heroin, meeting current and recovering addicts as they try to kick the habit in a country where there are no proper rehab and detox facilities.