Treats head, pubic (crab), and body lice. Completely eliminate lice from your family and home.Step 1 TREAT: Apply RID Lice Killing Shampoo according to label directions. Repeat this step 7 to 10 days later to help prevent reinfestation. Step 2 REMOVE: After Step 1, comb out the eggs and nits in the hair with a fine-toothed comb or with the RID comb (included).