Piperonyl butoxide is a chemical that stops the breakdown of pyrethrins, an insecticide chemical.
Piperonyl butoxide and pyrethrins topical (for the skin) is a combination medicine used to treat lice.
A-200 Lice Treatment, Good Sense Lice Killing Shampoo, Step 1, Leader Lice Solution, Pronto Lice Kill System, R & C Lice Treatment Kit, Rid Pediculicide, Tegrin-LT Lice Treatment Kit, Triple X Pediculicide
Less common or rare:
Skin irritation not present before use of this medicine
skin rash or infection
sneezing (sudden attacks of)
stuffy or runny nose
wheezing or difficulty in breathing
(topical shampoo, topical kit, topical spray, topical liquid)