The "Worminator" is pyrantel - also sold as Combantrin
To remove parasites from the body, the biological differences between worm and mammal are exploited. In the case of members of the roundworm family (the "ascarid" worms), the parasitic worm is attached to the host’s intestine by its tiny teeth and/or suckers. Pyrantel acts as a neuromuscular blocker so that the parasite relaxes its grip, effectively paralyzing the worm so that it loses its attachment. The worm is then passed with the feces into the cold, cruel world. Outside of the host protective body, the worm soon dies. Because the medication is absorbed poorly from the host’s intestine, the host is completely unaffected by the paralysis effect.
You can get it by the pint at Amazon in a generic form
http://www.amazon.com/Agri-Laborato...?s=pet-supplies&ie=UTF8&qid=1400624880&sr=1-1