Ivermectin Lotion, 0.5% Lice Treatment, is effective for treating Head Lice. Item contains one tube that you use one time. No Nit Combing Necessary. Treats Head Lice with a single application. No second application required, and Satisfaction guaranteed. Just put on dry scalp wait ten minutes and then completely rinse your head and scalp. After rinsing, dry and style as usual. Wait 24 hours before applying shampoo.