Pet Recall Facts

Ingredients / Ivermectin

Ivermectin: FDA adverse event reports for pets

Reports received through June 26, 2026. Data and limitations.

194,690Total reports
168,441Dog reports
1,020Cat reports

FDA-approved products with this ingredient (Green Book)

All approved products with this ingredient, for any species.

Brand names come only from the Green Book. Brand names in FDA's public report data are masked, so counts cannot be attributed to any brand. Ingredient names in the reports are written many ways; we group them under one ingredient name and count each report once per ingredient (method).

Reports by year received

1987406
1988396
1989412
1990177
199194
199241
199335
199469
1995108
1996159
1997230
1998147
1999241
2000169
2001280
2002702
20031,306
20042,556
20053,325
20064,378
20076,085
20087,269
20098,386
20107,940
20117,478
201210,219
201311,896
201411,134
201512,081
201611,922
201712,308
201811,699
201911,911
202010,317
20219,488
20228,024
20237,209
20246,443
20255,433
20262,213

Species named in reports

Dog168,441
Not given17,990
Horse3,417
Cattle2,365
Cat1,020
Human714
Sheep238
Pig142

Signs reported after Ivermectin

INEFFECTIVE, HEARTWORM LARVAE37,138
Lack of efficacy (endoparasite) - hookworm26,337
Lack of efficacy (endoparasite) - heartworm24,726
Vomiting23,111
Digestive tract disorder NOS16,773
INEFFECTIVE, ASCARIDS NOS11,892
Diarrhoea10,106
Cardiac disorder NOS10,099
Lack of efficacy - NOS8,884
Tablets, Abnormal8,129
Lethargy (see also Central nervous system depression in Neurological)7,578
INEFFECTIVE, HOOKS6,951
Lack of efficacy (endoparasite) - roundworm NOS5,154
Containers, Damaged3,530
Death3,526
Anorexia3,369
Ataxia3,299
Emesis3,259
Depression3,202
Seizure NOS3,090
Lack of efficacy (protozoa) - Coccidia2,529
Underfilling, Package2,084
Overdose2,012
Underdose1,991
Behavioural disorder NOS1,925

Breeds named in reports

Retriever - Labrador28,019
Crossbred Canine/dog21,120
Shepherd Dog - German8,860
Retriever - Golden8,482
Dog (unknown)8,186
Beagle5,333
Pit Bull4,697
Chihuahua4,382
Boxer (German Boxer)3,979
Terrier - Yorkshire3,501
Shih Tzu3,498
Shepherd Dog - Australian3,184
Dachshund (unspecified)3,048
Poodle - Standard2,705
Collie - Border2,541

Reported outcomes

Outcome Unknown67,089
Recovered/Normal27,017
Ongoing17,577
Recovered with Sequela17,011
Died4,188
Euthanized1,182

Report a problem to FDA