LICE PICTURESLice Removal Products Pyrethrin products currently on the market are NIX®, RID®, A-200®, and Clear®. When the directions are followed exactly these over-the-counter products are pretty safe. Some reactions to this treatment include itching, rash or an allergic reaction. Research in the U.S. has shown lice are resistant to the pyrethrin, which means live lice will still be found after treatment. As these products continue to be used, resistance will increase, making these products less and less effective. Licenders on the other hand makes a head lice shampoo that uses enzymes to kill the bug with a 100% success rate.