September 2020: 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 5,904 adverse event reports for animal drugs in September 2020. It received 6,010 reports in September 2019. The average of the 12 months before September 2020 is 5,748 reports for each month.

Of the 5,904 reports, 74.6% are about dogs, 10.6% are about cats and 0.8% 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, Mar 2019 to Mar 2021. The column with the outline is September 2020.

Reports by species

Dog74.6%4,406
Cat10.6%625
Horse0.8%47
Other species, or species not given14%826

Drug pages with reports received in September 2020

The table has every drug page with 10 or more reports that FDA received in September 2020, in order of name. No count decides which drug is in the table. The table has 81 drug pages.

Show the 81 drug pages

Drug pages with 10 or more reports received in September 2020, in order of name
Active ingredients	Reports received in September 2020
(S) - methoprene	19
Afoxolaner	457
Amoxicillin Trihydrate + Clavulanate Potassium	26
Betamethasone Acetate + Florfenicol + Terbinafine	12
Buprenorphine	27
Butorphanol Tartrate	33
Capromorelin	19
Carprofen	85
Cefovecin sodium	74
Cefpodoxime proxetil	20
Cephalexin	16
Clotrimazole + Gentamicin	23
Cyclosporine	35
Deracoxib	14
Desoxycorticosterone Pivalate	14
Detomidine Hydrochloride	11
Dexamethasone	20
Dexamethasone + Neomycin Sulfate + Thiabendazole	13
Dexmedetomidine	17
Dexmedetomidine hydrochloride	15
Diphenhydramine	34
Doramectin	10
Doxycycline	40
Emodepside + Praziquantel	27
Enrofloxacin	15
Famotidine	13
Febantel + Praziquantel + Pyrantel Pamoate	47
Firocoxib	10
Florfenicol + Mometasone furoate + Terbinafine	36
Fluralaner	680
Fluralaner + Moxidectin	45
Furosemide	11
Gabapentin	51
Gentamicin Sulfate + Hydrocortisone aceponate + Miconazole Nitrate	12
Grapiprant	73
Imidacloprid	75
Imidacloprid + Moxidectin	127
Insulin	75
Isoflurane	19
Ivermectin	63
Ivermectin + Praziquantel + Pyrantel Pamoate	19
Ivermectin + Pyrantel Pamoate	779
Ketamine Hydrochloride	13
Ketoconazole	15
Levothyroxine sodium	22
Lotilaner	152
Lufenuron + Milbemycin Oxime	114
Lufenuron + Milbemycin Oxime + Praziquantel	46
Maropitant	74
Melarsomine Dihydrochloride	108
Meloxicam	79
Metronidazole	16
Milbemycin Oxime	64
Milbemycin Oxime + Praziquantel	368
Milbemycin Oxime + Spinosad	440
Mirtazapine	11
Moxidectin	439
Nitenpyram	159
Oclacitinib	215
Omeprazole	15
Phenobarbital	10
Phenylpropanolamine hydrochloride	22
Pimobendan	25
Polysulfated Glycosaminoglycan	40
Praziquantel	32
Praziquantel + Pyrantel Pamoate	31
Prednisolone	19
Prednisone	64
Propofol	14
Pyrantel Pamoate	28
Pyrantel Pamoate + Sarolaner	268
Robenacoxib	16
Sarolaner	215
Sarolaner + Selamectin	139
Selamectin	135
Sodium Chloride	53
Spinosad	70
Tramadol	14
Trazodone	13
Trilostane	78
Tulathromycin	10

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 5,904 reports of the month.

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

Vomiting17%1,006 reports
Lack of efficacy (endoparasite) - heartworm[the product did not have the expected effect: heartworm]11.5%677 reports
Lethargy[unusually tired or inactive]8.6%505 reports
Lack of efficacy (ectoparasite) - flea[the product did not have the expected effect: fleas]7.7%453 reports
Diarrhoea[diarrhea]5.5%325 reports
Lack of efficacy - NOS[the product did not have the expected effect]3.4%203 reports
Seizure NOS[seizure, type not specified]3.4%203 reports
Unpalatable[legacy FDA term: the animal would not take it]3%176 reports
Death3%175 reports
Lack of efficacy (endoparasite) - roundworm NOS[the product did not have the expected effect: roundworms]2.7%162 reports
Anorexia[not eating]2.5%148 reports
Behavioural disorder NOS[behaviour change, type not specified]2.1%126 reports
Emesis (multiple)[vomiting more than once]2%120 reports
Ineffective, hooks[legacy FDA term: the product did not have the expected effect (hooks)]2%119 reports

Show the next 1 signs

Ataxia[unsteady, uncoordinated movement]1.9%114 reports

Ingredients, all combinations

The list has every active ingredient with 10 or more reports received in September 2020, in order of name. It has 83 ingredients.

Show the 83 ingredients

The same month in other years

Cite this page

Pet Drug Reports. September 2020: adverse event reports for animal drugs. https://petdrugreports.com/month/2020-09/ 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 September 2020 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 1,006 reports of the 5,904 reports of September 2020 (17%).