Ketamine, the illegal dance club drug, has successfully been used to treat NHS patients suffering from serious depression.
Infusions of ketamine given to patients in an Oxford trial had a rapid beneficial effect on those who were not responding to more orthodox treatments. Some had been suffering unremitting depression for many years despite various drugs and talking therapies.
Although many patients taking part in the trial at Oxford Health NHS Foundation Trust relapsed within a day or two, almost 30 per cent showed improvements lasting at least three weeks.
In 15 per cent of cases, patients took more than two months to relapse and some benefited for eight months.
Psychiatrist Dr Rupert McShane, from Oxford University, said: Weve seen remarkable changes in people whove had severe depression for many years that no other treatment has touched. Its very moving to witness.