Bingo!! After 4 rounds of Albenza and many rounds of Ivermectin, the nips and stings continued. Finally I got wise and tried a dose of PinX, and with only one regular dose, the nips and stings have stopped. At least for the time being - 3 days. What parasite would you interpret that to respond to PinX but not Albenza or Ivermectin??? Anyone???