<s>[INST] I am in the medical profession and I serve a client that has an issue with ongoing lice. Unfortunately, I have caught it as well as my daughter. We have treated with Sklice lotion, and I have taken ivermectin orally twice. I thought I was clear and then found two nits tonight. Does ivermectin sometimes not work? And how do you tell if the nits are alive or dead? Thank you [/INST] Hi,Thanks for writing in to hcm. Sklice lotion is a single dose ivermectin application cream. You need to wait for 14 days for the hair t be clear of lice.Along with this make sure you wash clothings, bedsheets etc in hot water and also clips ,combs are washed in hot water.After washing the hair with water and vinegar comb the wet hair to remove any dead lice or nits. If the nits have only the outer coats sticking to the hair which can be removed on combing wet hair.Hope this helped.Regards </s>