Paula, use discernment. It’s not ALWAYS worms. Sometimes it’s genes, chemicals, processed foods, etc. People should take a RUPA Health G-Map test to test for worms. We test animals for worms. That said, Ivermectin is always taken by weight! Always! For viruses, the ivermectin helps push zinc and other good things into the cells. From my understanding's we have to get rid of the cancerous cells. Sugar feeds those cells! If it was me, I would research the Carnivore diet and/or fasting too! Fenbendazole is NOT so much given by weight although it comes in the same kind of weight measurement tube for horses and cows. I actually double dose with Fenbendazole for many days to clean out any encrusted worms in their intestines. I do this twice, and sometimes more, a year. Not continuously. Worms are on a cycle and many de-wormers also help kill the larve. Be careful with anything animal products that say “Plus” on them or “gold”. Not good for humans. Panacur C for dogs is Fenbendazole.