What is it about?

Ectoparasiticide drugs are vital to the prevention and treatment of external parasites. We have summarized the latest indications of the major classes of ectoparasiticides used in small animal practice and highlighted the types of adverse drug reactions associated with the parasiticides used to treat ectoparasite infestations in dogs and cats.

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Why is it important?

Adverse drug reactions (ADRs) can cause complications in cats and dogs, and several therapeutic classes of ectoparasiticide drugs are associated with them. This paper highlights the importance of documenting the information about each animal that has an ADR because this can provide vital information about the susceptibility of a reaction occurring. Perhaps a particular breed, age, gender or weight could have a predisposition to having an ADR to a certain drug. This knowledge would allow clinicians and pet owners to be more prepared for such an event.


Overall, the expected benefits of treatment and protection from ectoparasite infestations using ectoparasiticides are far greater than the potential risk of harmful reactions associated with treatment.

Hany Elsheikha
University of Nottingham

Read the Original

This page is a summary of: CPD article: An updated review of the indications and adverse drug events associated with the ectoparasiticides used in small animal practice, Companion Animal, November 2020, Mark Allen Group,
DOI: 10.12968/coan.2020.0069.
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