You may have heard about lawsuits pertaining to Roundup weed killer. Roundup is similar to Paraquat -- they are both weed killers -- but it contains a different toxic chemical. The hazardous agent in Paraquat is paraquat dichloride. Roundup contains glyphosate, which is not quite as strong as paraquat dichloride. Like Paraquat, Roundup contains chemicals that are known to cause Parkinson's disease. There are many similarities between Roundup lawsuits and Paraquat lawsuits, but they are filed separately because they involve two different products made by two different manufacturers.