
Veterinarians consider Panacur C (fenbendazole) for dogs with roundworms, hookworms, whipworms or Taenia species tapeworms, based on fecal testing or known exposure. It is FDA-approved and labeled for a 3-day course, with the granules mixed into food once daily.
At a pharmacological level, fenbendazole is a benzimidazole anthelmintic that binds to a structural protein (beta-tubulin) inside parasite cells, disrupting the parasite's internal structure and glucose uptake over the course of the multi-day treatment. Your veterinarian determines the appropriate use based on your dog's weight, fecal exam findings and parasite exposure history.
The actions described here reflect the product's FDA-approved labeling; your veterinarian determines the appropriate use for your animal.
This is an over-the-counter product. Use according to the product labeling and your veterinarian's guidance. Available through Mixlab.
In FDA-reviewed clinical use, vomiting was reported in a small minority of treated dogs (about 1% in label studies); Panacur C has been used safely in puppies as young as 6 weeks, in pregnant dogs and in adult dogs at the labeled dose. Give the full 3-day course as directed even if your dog seems improved after the first dose, since interrupting treatment early may not fully clear the parasite burden. Contact your veterinarian if you notice vomiting that doesn't resolve, diarrhea or a lack of appetite, and bring a fresh fecal sample to your recheck so your veterinarian can confirm the parasites have cleared.
No. Panacur C is an FDA-approved over-the-counter dewormer and doesn't require a prescription to purchase. Mixlab still recommends confirming the diagnosis and correct dosing with your veterinarian, especially for puppies or dogs with other health conditions.
Yes. While Panacur C is available as a commercial granule product, Mixlab can compound the active ingredient, fenbendazole, into alternative formats if your veterinarian determines a customized preparation would better suit your dog's needs.
The granules are mixed into a small amount of your dog's regular food once daily for 3 consecutive days. Follow the packet size for your dog's weight.
Your veterinarian may recommend a recheck fecal exam to confirm the parasites have cleared, and may recommend a repeat course depending on the parasite involved and your dog's ongoing exposure risk.