05-30-2010, 11:58 AM
The pyrethrin-related insecticides like this are chemically related to what occurs in chrysanthemums. They replaced much more toxic (to humans) insecticides over the years. One of them is the active ingredient in NIX, a head lice treatment, that has been approved for sale by the FDA, not an easy approval to obtain. If she doesn't drink it she ought not come to any harm.