If some live lice are still found 8-12 hours after treatment, but are moving more slowly than before, do not retreat. Comb dead and remaining live lice out of the hair. The medicine sometimes takes longer to kill the lice. If, 8-12 hours after treatment, no dead lice are found and lice seem as active as before, the medicine may not be working. See your health care provider for a different medication and follow their treatment instructions.
Many flea combs made for cats and dogs are also effective.
After treatment, check, comb, and remove nits and lice from hair every 2-3 days. Check all treated persons for 2- 3 weeks until you are sure all lice and nits are gone. To kill lice and nits, machine wash all washable clothing and bed linens that the infested person touched during the 2 days before treatment. Dry laundry using the hot cycle for at least 20 minutes. Store all clothing, stuffed animals, comforters, etc., that cannot be washed or dry cleaned into a plastic bag and seal for 2 weeks.