The cleanser was invented by former Mead Johnson executive and chemist Robert Smith during the early 1960s. Tecnu, for "Technically New," was intended to remove radioactive fallout dust from skin. Several years later, his wife discovered another use for the cleanser. After an exposure to poison oak, she washed with Tecnu and did not get urushiol-induced contact dermatitis.
In 1977, the company began to market Tecnu to foresters, firefighters, surveyors, and utility crews. It has since become a popular remedy for gardeners and others who live and work around poison ivy.
Effectiveness
Tecnu's effectiveness for postexposure treatment has been supported in a nonrandomized study, in which Tecnu and two other cleansers were compared to an untreated positive control. Tecnu provided the greatest protection against dermatitis symptoms at 70%; however, there was no statistically significant advantage in effectiveness over the other two cleansers, both of which were less expensive.
↑Moody, Jennifer (March 30, 2014). "A Rash of Innovation: A Half-Century Ago, a Yard Full of Poison Oak in Corvallis Lit the Fuse on a Pharmaceutical Power". Corvallis Gazette-Times. pp.A1, A5.