Signs / Lack of efficacy (ectoparasite) - flea
Lack of efficacy (ectoparasite) - flea: medicines most often named in FDA reports
Reports received through June 26, 2026. Data and limitations.
65,571Total reports
53,948Dog reports
11,414Cat reports
Species named in reports
These are the ingredients most often named in the supplied reports, displayed alphabetically. One report may name multiple ingredients; counts must not be used to compare products.