Polysubstance abuse research and statistics are well-described in this 88-page PDF file, from prevalence to mortality. The document has good informational and research qualities, but remember that it is 88-pages long.
Here you will find a chart written in PDF format explaining drug abuse and some of their effects, usual forms found, their risk potential for excessive use leading to physical and psychological dependence, common effects, including possible effects in ove
An excellent online map locator for drug and alcohol abuse treatment programsfor the whole USA. The site is from the US Dept. of Health and Human Services. Search for the drug and alcoholism treatment programs by clicking on the map.