January 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 5,295 adverse event reports for animal drugs in January 2020. It received 5,478 reports in January 2019. The average of the 12 months before January 2020 is 6,041 reports for each month.

Of the 5,295 reports, 73.3% are about dogs, 8.9% 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, Jul 2018 to Jul 2020. The column with the outline is January 2020.

Reports by species

Dog73.3%3,883
Cat8.9%473
Horse0.8%42
Other species, or species not given16.9%897

Drug pages with reports received in January 2020

The table has every drug page with 10 or more reports that FDA received in January 2020, in order of name. No count decides which drug is in the table. The table has 80 drug pages.

Show the 80 drug pages

Drug pages with 10 or more reports received in January 2020, in order of name
Active ingredients	Reports received in January 2020
(S) - methoprene	17
Acepromazine Maleate	12
Afoxolaner	306
Amoxicillin Trihydrate + Clavulanate Potassium	35
Bupivacaine	13
Buprenorphine	13
Butorphanol Tartrate	29
Capromorelin	19
Carprofen	85
Cefovecin sodium	72
Cefpodoxime proxetil	14
Ceftiofur Crystalline Free Acid	13
Cephalexin	11
Clotrimazole + Gentamicin	13
Cyclosporine	59
Deracoxib	18
Desoxycorticosterone Pivalate	15
Dexamethasone	17
Dexmedetomidine hydrochloride	18
Diphenhydramine	26
Doramectin	22
Doxycycline	30
Emodepside + Praziquantel	24
Enrofloxacin	16
Eprinomectin	13
Eprinomectin + Praziquantel	23
Famotidine	12
Febantel + Praziquantel + Pyrantel Pamoate	43
Fenbendazole	10
Florfenicol + Mometasone furoate + Terbinafine	25
Florfenicol + Terbinafine	12
Fluralaner	494
Gabapentin	29
Gamithromycin	14
Grapiprant	84
Imidacloprid	21
Imidacloprid + Moxidectin	106
Insulin	106
Isoflurane	14
Ivermectin	47
Ivermectin + Praziquantel + Pyrantel Pamoate	14
Ivermectin + Pyrantel Pamoate	763
Ketamine Hydrochloride	10
Ketoconazole	18
Levothyroxine sodium	14
Lotilaner	104
Lufenuron + Milbemycin Oxime	123
Lufenuron + Milbemycin Oxime + Praziquantel	83
Maropitant	73
Melarsomine Dihydrochloride	115
Meloxicam	53
Metronidazole	16
Milbemycin Oxime	46
Milbemycin Oxime + Praziquantel	405
Milbemycin Oxime + Spinosad	444
Mirtazapine	20
Monensin	14
Moxidectin	576
Nitenpyram	51
Oclacitinib	155
Omeprazole	13
Pimobendan	28
Polysulfated Glycosaminoglycan	42
Pradofloxacin	10
Praziquantel	24
Praziquantel + Pyrantel Pamoate	22
Prednisolone	19
Prednisone	42
Propofol	14
Pyrantel Pamoate	16
Rabacfosadine	10
Robenacoxib	19
Sarolaner	171
Sarolaner + Selamectin	73
Selamectin	106
Sodium Chloride	52
Spinosad	57
Telmisartan	11
Trilostane	104
Tulathromycin	15

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 5,295 reports of the month.

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

Vomiting16.8%892 reports
Lack of efficacy (endoparasite) - heartworm[the product did not have the expected effect: heartworm]13.9%734 reports
Lethargy[unusually tired or inactive]7.9%418 reports
Diarrhoea[diarrhea]5.7%300 reports
Ineffective, hooks[legacy FDA term: the product did not have the expected effect (hooks)]4.3%226 reports
Product problem[a product quality report, not a sign in an animal]3.3%174 reports
Seizure NOS[seizure, type not specified]3.2%171 reports
Death3%160 reports
Containers, Damaged[a product quality report, not a sign in an animal]2.7%142 reports
Unpalatable[legacy FDA term: the animal would not take it]2.6%136 reports
Lack of efficacy (endoparasite) - roundworm NOS[the product did not have the expected effect: roundworms]2.5%135 reports
Lack of efficacy - NOS[the product did not have the expected effect]2.4%127 reports
Behavioural disorder NOS[behaviour change, type not specified]2.2%118 reports
Lack of efficacy (ectoparasite) - flea[the product did not have the expected effect: fleas]2.2%118 reports

Show the next 1 signs

Not eating2.2%117 reports

Ingredients, all combinations

The list has every active ingredient with 10 or more reports received in January 2020, in order of name. It has 76 ingredients.

Show the 76 ingredients

The same month in other years

Cite this page

Pet Drug Reports. January 2020: adverse event reports for animal drugs. https://petdrugreports.com/month/2020-01/ 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 January 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 892 reports of the 5,295 reports of January 2020 (16.8%).