TMP/SMX (Bactrim, Septra) for head lice
You might see physicians try TMP/SMX (Bactrim, Septra) for head lice.
A new article in Pediatrics shows that combining TMP/SMX with Nix (permethrin) works better than either agent alone.
The lice ingest TMP/SMX from blood in the scalp. TMP/SMX then kills the nutrient-producing bacteria that live in the lice.