So I just discovered my kid has lice. I read online that from place to place they may be resistant to specific treatments, and I know that the time my cats got fleas that was absolutely true of the fleas (Frontline did nothing, I had to buy Advantix) so I thought it was worth asking: anyone here know from experience? Any product I shouldn't bother with or anything that will definitely help?

I'm new to this experience and would like to get it over with as quickly as possible. Ever since I realized the kid has it my head has been itching like crazy.