Call for research into mind-altering drugs
Former government drugs adviser Prof David Nutt has said that regulations should be relaxed to enable researchers to experiment on mind-altering drugs.
Prof Nutt told BBC News that magic mushrooms, LSD, ecstasy, cannabis and mephedrone all have potential therapeutic applications.
However, he said they were not being studied because of the restrictions placed on researching illegal drugs.
Pallab Ghosh reports.