The U.S. Food & Drug Administration is warning consumers to use common sense with their numbing creams.
Citing the two deaths of women in their 20's, both of whom applied topical anesthetics to their legs after laser hair removal, the FDA says that even over-the-counter versions of these commonly used creams -- which contain ingredients such as lidocaine, tetracaine, benzocaine, and prilocaine -- can enter the bloodstream and be toxic when applied over large areas of the body or for long periods of time. The women who died had also wrapped their legs in plastic over the creams, as instructed. Both experienced seizures and comas prior to death from drug toxicity.
Numbing creams are often prescribed for use both during and after some cosmetic procedures to control pain. While they have been and can continue to be used safely and effectively, the FDA recommends medical supervision and consumer caution. Particularly at risk are small children and anyone with liver or heart disease.
For more information, see the FDA Health Advisory on their website.