Ivermectin (or Mectizan trade mark ) is widely used by onchocerciasis and lymphatic filariasis control programs worldwide. Generally, Mectizan trade mark is both safe and well tolerated. An exception to this general pattern is in some areas co-endemic for Onchocerca volvulus and Loa loa, where a number of severe adverse reactions to Mectizan trade mark have been noted in L. loa infected individ...