May 2019: adverse event reports that FDA received

Month in which FDA received the reports

Read this first. FDA says this about the data:

An API dataset query result cannot be used to estimate the risk associated with the product or compare one drug or device product with another. When looking at the results, be aware that there is no certainty that the reported drug or device caused the adverse event. This dataset should not be the sole source of information for clinical decision-making or other assumptions about the safety or effectiveness of a product. The adverse event may have been related to an underlying disease, other drugs used at the same time or other non-drug related sources.
FDA Center for Veterinary Medicine publishes these words. Source: Adverse Event Reports for Animal Drugs and Devices, read on 2 Oct 2026. The data have the reports that FDA received through 26 Jun 2026.

FDA received 7,456 adverse event reports for animal drugs in May 2019. It received 7,451 reports in May 2018. The average of the 12 months before May 2019 is 6,060 reports for each month.

Of the 7,456 reports, 74.2% are about dogs, 9.4% are about cats and 0.6% are about horses. The other reports are about other species, or give no species. A report is not proof that a drug caused a sign.

Search engines do not list month pages. The site keeps the page, and the list of months links it.

The months before and after

Reports for each month, Nov 2017 to Nov 2019. The column with the outline is May 2019.

Reports by species

Dog74.2%5,532
Cat9.4%703
Horse0.6%47
Other species, or species not given15.7%1,174

Drug pages with reports received in May 2019

The table has every drug page with 10 or more reports that FDA received in May 2019, in order of name. No count decides which drug is in the table. The table has 79 drug pages.

Show the 79 drug pages

Drug pages with 10 or more reports received in May 2019, in order of name
Active ingredients	Reports received in May 2019
(S) - methoprene	38
Afoxolaner	660
Alfaxalone	10
Amoxicillin Trihydrate + Clavulanate Potassium	94
Atipamezole Hydrochloride	10
Buprenorphine	28
Butorphanol Tartrate	31
Capromorelin	16
Carprofen	115
Cefovecin sodium	62
Cefpodoxime proxetil	18
Ceftiofur Crystalline Free Acid	12
Cephalexin	12
Cyclosporine	54
Deracoxib	11
Desoxycorticosterone Pivalate	15
Dexamethasone	17
Dexmedetomidine	18
Dexmedetomidine hydrochloride	28
Diphenhydramine	28
Doramectin	17
Doxycycline	26
Emodepside + Praziquantel	22
Enrofloxacin	50
Estriol	10
Famotidine	10
Febantel + Praziquantel + Pyrantel Pamoate	50
Fenbendazole	10
Firocoxib	17
Florfenicol + Mometasone furoate + Terbinafine	37
Florfenicol + Terbinafine	24
Fluoxetine hydrochloride	12
Fluralaner	1,217
Gabapentin	35
Grapiprant	110
Imidacloprid	59
Imidacloprid + Moxidectin	165
Insulin	93
Isoflurane	17
Ivermectin	75
Ivermectin + Praziquantel + Pyrantel Pamoate	24
Ivermectin + Pyrantel Pamoate	1,101
Ketamine Hydrochloride	15
Levothyroxine sodium	21
Lotilaner	155
Lufenuron + Milbemycin Oxime	165
Lufenuron + Milbemycin Oxime + Praziquantel	84
Maropitant	88
Melarsomine Dihydrochloride	85
Meloxicam	45
Methylprednisolone Acetate	14
Metronidazole	20
Milbemycin Oxime	77
Milbemycin Oxime + Praziquantel	479
Milbemycin Oxime + Spinosad	682
Mirtazapine	22
Monensin	16
Moxidectin	403
Nitenpyram	135
Oclacitinib	173
Omeprazole	18
Pimobendan	29
Polysulfated Glycosaminoglycan	49
Praziquantel	17
Praziquantel + Pyrantel Pamoate	29
Prednisolone	17
Prednisone	43
Propofol	20
Pyrantel Pamoate	25
Rabacfosadine	11
Robenacoxib	16
Sarolaner	370
Sarolaner + Selamectin	117
Selamectin	184
Sodium Chloride	30
Spinosad	128
Telmisartan	13
Tramadol	16
Trilostane	96

The openFDA records give the value "MSK" for the brand name and for the manufacturer name of each drug. FDA says that MSK means "masked". So the site cannot count a report for a brand.

An API dataset query result cannot be used to estimate the risk associated with the product or compare one drug or device product with another.
Commonly used products may have a higher number of reported adverse events due to the higher total number of animals being given the product.
FDA Center for Veterinary Medicine. Source: Adverse Event Reports for Animal Drugs and Devices

Signs that the reports of the month list

A sign is a coded term from the report. The words in brackets are a plain gloss of the term. The percentage is the share of the 7,456 reports of the month.

The sign that is in the largest number of the reports comes first.

Vomiting18.4%1,373 reports
Lethargy[unusually tired or inactive]8.4%625 reports
Lack of efficacy (endoparasite) - heartworm[the product did not have the expected effect: heartworm]8.1%601 reports
Ineffective, hooks[legacy FDA term: the product did not have the expected effect (hooks)]6.3%471 reports
Diarrhoea[diarrhea]5.6%420 reports
Seizure NOS[seizure, type not specified]4.3%319 reports
Lack of efficacy (ectoparasite) - flea[the product did not have the expected effect: fleas]4.2%316 reports
Unpalatable[legacy FDA term: the animal would not take it]3.3%249 reports
Lack of efficacy (ectoparasite) - tick NOS[the product did not have the expected effect: ticks]3%222 reports
Product problem[a product quality report, not a sign in an animal]2.9%217 reports
Lack of efficacy (flea)[the product did not have the expected effect: fleas]2.3%174 reports
Anorexia[not eating]2.2%166 reports
Emesis (multiple)[vomiting more than once]2.2%162 reports
Lack of efficacy (tick)[the product did not have the expected effect: ticks]2.1%156 reports

Show the next 1 signs

Not eating2.1%156 reports

Ingredients, all combinations

The list has every active ingredient with 10 or more reports received in May 2019, in order of name. It has 79 ingredients.

Show the 79 ingredients

The same month in other years

Cite this page

Pet Drug Reports. May 2019: adverse event reports for animal drugs. https://petdrugreports.com/month/2019-05/ Source: FDA Center for Veterinary Medicine, openFDA Animal and Veterinary adverse event reports, export of 30 Oct 2026. Reports received through 26 Jun 2026.

Where the data come from

The counts come from the openFDA Animal and Veterinary adverse event files, export of 30 Oct 2026. The files have the reports that the FDA Center for Veterinary Medicine received through 26 Jun 2026. The files mask brand and manufacturer names. The site counts a drug by the active ingredients that each record gives, and gives no count to a brand, an application or a company. Ingredient names and the lists of approved products follow the FDA Green Book of 2 Nov 2026. The month is the month in which FDA received the report, not the month of the event.

The site does not publish report text, lot numbers or details of a reporter. FDA's record is the authority. See how the site counts reports, the data sources and the corrections page.

Questions about this month

Can the count for May 2019 change?: Yes. FDA says that a report can take 3 to 6 months to reach the public data. The newest months can get more reports in a later update.
Does the month show when the event occurred?: No. The month is the month in which FDA received the report. The event can be from an earlier month.
Which sign is in the largest number of the reports of the month?: "Vomiting" is in 1,373 reports of the 7,456 reports of May 2019 (18.4%).