Revised labeling now required by FDA for lice and scabies treatments containing the insecticide lindane (gamma benzene hexachloride) encourages using the prescription products only if other approved therapies without lindane have not worked.

The labeling also advises health-care providers and parents not to confuse prolonged itching with a reinfestation of these parasitic infections. Even after successful treatment, itching can continue, due to residual inflammation in the skin.

FDA required the revisions because of concerns that some parents may be ...

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