Agree with Buggered here. I was real fiber sick (no GI problems but 45 morgellons symptoms) and bombed myself with 4 months (1 or 2 doses daily) of ivermectin, fenbendazole, and pyrantel pamaote. That worked, and made the organs hurt, a lot. The fenben feels (and liver function tests confirm) that it is something I can take a couple days a month for many years to maintain control over these currently unidentified parasitic organisms.