"...In 2006, a research team at the University of Birmingham showed that ecstasy and anti-depressants such as Prozac had the potential to stop cancers growing.
The problem was that it needed doses so high they would have been fatal if given to people.
The researchers, in collaboration with the University of Western Australia, have chemically re-engineered ecstasy by taking some atoms away and putting new ones in their place.
One variant increased cancer-fighting effectiveness 100-fold. It means that if 100g of un-modified ecstasy was needed to get the desired effect, only 1g of the modified ecstasy would be needed to have the same effect...."