Praziquantel, pyrantel pamoate and piperazine are 3 important anti-helminthic drugs which exert their effects by causing paralysis of the parasites. In this video, a comprehensive account of all these drugs is given. Timeline: 0.00- Overview 0.41- Mechanisms of action 2.20- Pyrantel pamoate (MOA, use, side effects, dose) 7.42- Praziquantel (MOA, use, side effects, dose)