Source: Crowdflower. http://www.crowdflower.com/open-data-library This dataset has all tweets that mention Claritin for October, 2012. The tweets are tagged with sentiment, the author's gender, and whether or not they mention any of the top 10 adverse events reported to the FDA. You can see a visualization of the full dataset here: https://senti.crowdflower.com/datasets/857/t/91f9ed1ab4281adf. For a fuller description of the dataset, see here: https://crowdflower.com/blog/2013/03/discovering-drug-side-effects-with-crowdsourcing/.