Q. What is the safety of paraquat to farmers when used long-term?

A. The potential long-term hazard associated with the use of paraquat has also been studied. The World Health Organization concluded (Environmental Health Criteria, 1984) that there were no significant differences in all health parameters measured between paraquat users and non-paraquat users, which led the authors to suggest that the long-term use of paraquat was not associated with harmful effects on health. This has been confirmed in detailed surveys comparing the health of long-term users of paraquat with unexposed people.