Application Morantel is a anthelmintic compound used to treat parasitic infections in livestock1. It is also used to study allosteric potentiation of rat neuronal nicotinic acetylcholine receptors (nAChRs)1 and is used to study nematode nicotinic receptors2. Biochem/physiol Actions Morantel is a potent non-canonical (binding site) acetylcholine (ACh) receptor agonist and inhibits fumarate reductase. Morantel increases the macroscopic currents evoked by acetylcholine (ACh) from nAChRs expressed in Xenopus laevis oocytes up to 8 times1. Morantel is a potent non-canonical (binding site) acetylcholine (ACh) receptor agonist and inhibits fumarate reductase.