Extra Strength Denorex Shampoo + Conditioner does not advertise that is kills lice. The product contains 3 percent salicylic acid to relieve and prevent the occurrence of dandruff.
Denorex shampoo is a prescription-strength formula that is advertised to stop persistent flaking from the scalp. It should be used twice a week for the best results. This shampoo contains menthol to cool and soothe the scalp as well as provitamin B5 to help increase the shine and manageability of the hair. The shampoo is designed to reduce flaking and dandruff, and it is also formulated to relieve itching of the scalp.