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by Although many claim cannabis to be a 'gateway drug' to harder things like heroine, its use is prevalent and defended by many. A new study reported in the New Scientist on the use of marijuana by teenagers in particular, however, results in 'overwhelming evidence that people under 21 should not use marijuana because of the risk of damaging the developing brain.'
The study, performed by researchers at the Karolinska Institute in Sweden, administered doses of THC to rats to mimic a human smoking one joint every three days from age 12 to 18. One week later, rats were able to self-administer heroine by pushing a lever. All the rats began to self-administer heroin frequently, eventually stabilizing their daily intake at a certain level. The ones who had been on THC as teenagers, however, stabilized their intake at a much higher level than the others, a result of being less sensitive to the effects of heroin. The effect continued through the rest of their lives.
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I disagree
I've been smoking for 11 years and never tried any other drug. I also find that marijuana increases my tolerance level to deal with others and everyday life situations. I think you should focus on teenagers and over-the-counter prescriptions and also prescribed drugs and the effect it has on them.
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Another possible experiment by Anonymous :: NR0 :: Show
I am thinking after the initial THC dose, they should have given the rats the choice to self-administer THC or heroin... Then measure their preference using ANOVA to find the statistical significance of the choice.