Sorry to momentarily derail but - from a Guardian UK article on a
Nature (peer-reviewed journal) study on wikipedia's accuracy found on the 'reliability of wikipedia' wikipedia page -
In December 2005, the journal Nature conducted a single-blind study comparing the accuracy of a sample of articles from Wikipedia and Encyclopædia Britannica. The sample included 42 articles on scientific topics, including biographies of well-known scientists. The articles were compared for accuracy by academic reviewers who remained anonymous − a customary practice for journal article reviews. Based on their review, the average Wikipedia article contained 4 errors or omissions; the average Britannica article, 3. Only 4 serious errors were found in Wikipedia, and 4 in Encyclopædia Britannica. The study concluded: "Wikipedia comes close to Britannica in terms of the accuracy of its science entries",[5] although Wikipedia's articles were often "poorly structured""]In December 2005, the journal Nature conducted a single-blind study comparing the accuracy of a sample of articles from Wikipedia and Encyclopædia Britannica. The sample included 42 articles on scientific topics, including biographies of well-known scientists. The articles were compared for accuracy by academic reviewers who remained anonymous − a customary practice for journal article reviews. Based on their review, the average Wikipedia article contained 4 errors or omissions; the average Britannica article, 3. Only 4 serious errors were found in Wikipedia, and 4 in Encyclopædia Britannica. The study concluded: "Wikipedia comes close to Britannica in terms of the accuracy of its science entries",[5] although Wikipedia's articles were often "poorly structured"
It's rather apparent that in the interim since this was published originally that they've taken even further steps to ensure accuracy and reliability and in my rather unscientific assessment, I think it's largely only improved since.
One aspect that I find particularly useful for less-informed BLers is that most pharmaceuticals with any recreational use whatsoever have a section on that use on their respective wikipedia pages or it's otherwise discussed in another section.