Veterinary use compounding

Several other heterocyclic compounds are used as veterinary anthelmintics although they lack the spectrum of activity of the above classes. For example, the antischistosomal drug, praziquantel (14), is highly effective in the treatment of cestodes in animals and man. The piperazine-derived drug diethylcarbamazine (15a) is used as a filaricide and for treatment of lungworm infections in sheep and cattle. The mode of action of diethylcarbamazine (13a) is uncertain but recent studies suggest that an effect on the helminth cuticle may be important. 

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