Maybe they should legalise it and let the consumers decide what strength they want...
"In recent years, the average THC content of marijuana sold in Britain has doubled to 12 percent from around 6 percent, while in the Netherlands it is about 18 percent, Murray said.
Most users of cannabis still do not have a problem with the drug but a minority, possibly because of genetic factors, are vulnerable to long-term damage from modern skunk -- which Murray says is to old-fashioned dope what whisky is to lager.
The rise in THC content is linked with a decline in another active ingredient called cannabidiol (CBD), since the two products compete biochemically inside the cannabis plant.
CBD, which reduces anxiety but does not produce the euphoric high of THC, may help offset some of the paranoid feelings.
Markus Leweke of Cologne University said a clinical trial involving 42 patients showed CBD was as effective as the established medicine amisulpride, sold as Solian by Sanofi-Aventis, in treating patients with psychosis.
"It seems there are good guys and bad guys within cannabis," Leweke said."