Panacur vs Panacur C: what is the difference?

Panacur and Panacur C are both brand names for the same active ingredient, Fenbendazole, which is an anthelmintic medication used to treat various parasitic infections in animals.  

Preclinical research and anecdotal reports suggest that Fenbendazole may have cancer treatment potential in humans, along with the human medications in the same class of drugs, called benzimidazoles.  

The main difference between Panacur and Panacur C lies in their formulations and intended use: Panacur typically comes in a paste or liquid form and is available through a prescription through a veterinarian, whereas Panacur C is available online without a prescription and comes mainly in powder form.