Fenbendazole (also known as "Panacur" or "Safe-Guard") is a deworming medication used to chase out certain types of internal parasites that are common in imported tortoises. Many captive bred tortoises that are kept outdoors will also pick up various intestinal worms, and should be checked regularly for them. This medicine, while one of the safer ones to use, should only be used under direction of a veterinarian. We do not give out dosage information, so please don't ask.