Ketamine is licenced to be used as an anaesthetic and has a reputation as an illegal party drug. But after trials in the US and UK, many are calling for its wider use to treat depression. However, it is a powerful drug that can have dangerous side effects and was recently linked to the death of US actor Matthew Perry.

Professor of Psychopharmacology at the University of Exeter, Celia Morgan joins Katya Adler to talk about her trials of the drug to treat addiction. And neuroscientist Dr Dean Burnett, from the BBC’s Science Focus Magazine tells us what he learnt after legally experiencing ketamine therapy in the US.

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This episode was made by Alice Aylett Roberts and Beth Timmins. The technical producers were Jack Graysmark and Matt Hewitt. The assistant editor is Sergi Forcada Freixas and the senior news editor is Jonathan Aspinwall.