How Long Do You Leave Permethrin Cream On For Head Lice?

How Long Do You Leave Permethrin Cream On For Head Lice? Leave the medicine on your skin for 8 to 14 hours, then wash it off completely. When using permethrin topical on an infant, also apply the medicine to the scalp, temples, and forehead. How many times should permethrin cream be applied? Permethrin lotion is