THC levels in hashish can vary from almost none to 70%, and hash oil from 30-90%.
The brains of Ecstasy users who experience serotonin depletion because of their Ecstasy will take a significant amount of time to restore the level of serotonin needed to perform important physiological and psychological functions.
Out of the over 2 million drug related emergency room visits in 2009, over 27 percent were for nonmedical use of pharmaceuticals.
Some herbal remedies can have harmful effects when mixed with alcohol.