How can you most effectively remove head lice in a long haired 11 year old female?

Lice treatment...: http://www.cdc.gov/parasites/lice/head/treatment.html this website from the U.S. Centers for disease control gives very good information about lice and their treatment. Hopes that this helps. Over the counter preparations such as "rid" and "nix" usually do the trick. Follow the directions on the product.

Lice: Tx of lice requires accurate identification of nits & / or lice. A pediculicide is usually used- otc like nix (permethrin) or rid or prescription meds like lindane or malathion. Work carefully through hair & remove individual nits. Purchase a special lice nit comb to aid you. Check for nits & remove as seen over the next 7 to 10 days. If there are nits after 7 to 10 days – a 2nd pediculicide tx may be needed.