lice killer

Label ages vary. Product labels commonly list use for children as young as 6 months, or for 1 year and up, 2 years and up, and 6 years and up, depending on the product.

Instructions vary by product. Some sprays instruct you to saturate the hair and let it air-dry, while many shampoos and lotions specify brief rinse times—commonly around 10 minutes—before rinsing or following additional directions on the label.

Prevention sprays commonly use essential oils and fragrances such as peppermint, lavender, rosemary, citronella, and lemongrass. One listing described a licorice-like scent for a spray.

Many kits include a home-control spray formulated for furniture and bedding. Product descriptions often claim these sprays kill lice (and sometimes bedbugs) and some listings state a residual effect lasting up to four weeks.

Common warnings include keeping products out of reach of children, avoiding contact with eyes (eye irritant notices), age restrictions or “not for” specific young ages, and advising consultation with a doctor if pregnant or nursing for some items.

Some products advertise a one-application or “one-and-done” approach and claim no nit combing is required, while others promote reduced combing and still include a fine-tooth comb to assist removal after treatment.