January 2021: 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 . The data have the reports that FDA received through .
FDA received 4,565 adverse event reports for animal drugs in January 2021. It received 5,295 reports in January 2020. The average of the 12 months before January 2021 is 5,697 reports for each month.
Of the 4,565 reports, 73.5% are about dogs, 9.3% are about cats and 1.3% 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 by species
- Dog73.5%3,355
- Cat9.3%425
- Horse1.3%60
- Other species, or species not given15.9%725
Drug pages with reports received in January 2021
The table has every drug page with 10 or more reports that FDA received in January 2021, in order of name. No count decides which drug is in the table. The table has 78 drug pages.
Show the 78 drug pages
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 4,565 reports of the month.
The sign that is in the largest number of the reports comes first.
- Vomiting15.6%711 reports
- Lack of efficacy (endoparasite) - heartworm[the product did not have the expected effect: heartworm]13.9%635 reports
- Lethargy[unusually tired or inactive]8.2%373 reports
- Diarrhoea[diarrhea]5.6%254 reports
- Lack of efficacy (endoparasite) - roundworm NOS[the product did not have the expected effect: roundworms]4.4%200 reports
- Seizure NOS[seizure, type not specified]3.6%163 reports
- Lack of efficacy - NOS[the product did not have the expected effect]3.3%149 reports
- Death2.7%123 reports
- Lack of efficacy (ectoparasite) - flea[the product did not have the expected effect: fleas]2.7%121 reports
- Not eating2.6%117 reports
- Unpalatable[legacy FDA term: the animal would not take it]2.4%109 reports
- Containers, Damaged[a product quality report, not a sign in an animal]2.3%103 reports
- Anorexia[not eating]2.2%100 reports
- Emesis (multiple)[vomiting more than once]2.1%98 reports
Show the next 1 signs
- Decreased appetite2.1%97 reports
Ingredients, all combinations
The list has every active ingredient with 10 or more reports received in January 2021, in order of name. It has 78 ingredients.
Show the 78 ingredients
- Acepromazine Maleate
- Afoxolaner
- Amoxicillin
- Amoxicillin Trihydrate
- Betamethasone Acetate
- Buprenorphine
- Butorphanol Tartrate
- Capromorelin
- Carprofen
- Cefovecin sodium
- Cefpodoxime proxetil
- Ceftiofur Crystalline Free Acid
- Clavulanate Potassium
- Clotrimazole
- Cyclosporine
- Deracoxib
- Desoxycorticosterone Pivalate
- Dexamethasone
- Dexmedetomidine hydrochloride
- Diphenhydramine
- Doxycycline
- Emodepside
- Enrofloxacin
- Eprinomectin
- Estriol
- Famotidine
- Febantel
- Firocoxib
- Florfenicol
- Fluralaner
- Furosemide
- Gabapentin
- Gentamicin
- Gentamicin Sulfate
- Grapiprant
- Hydrocortisone aceponate
- Imidacloprid
- Insulin
- Isoflurane
- Itraconazole
- Ivermectin
- Ketamine Hydrochloride
- Ketoconazole
- Levothyroxine sodium
- Lotilaner
- Lufenuron
- Maropitant
- Melarsomine Dihydrochloride
- Meloxicam
- Metronidazole
- Miconazole Nitrate
- Milbemycin Oxime
- Mirtazapine
- Mometasone furoate
- Monensin
- Moxidectin
- Neomycin Sulfate
- Nitenpyram
- Oclacitinib
- Omeprazole
- Pergolide mesylate
- Phenylpropanolamine hydrochloride
- Pimobendan
- Polysulfated Glycosaminoglycan
- Praziquantel
- Prednisone
- Propofol
- Pyrantel Pamoate
- Robenacoxib
- Sarolaner
- Selamectin
- Sodium Chloride
- Spinosad
- Terbinafine
- Thiabendazole
- Tiletamine Hydrochloride
- Trilostane
- Tulathromycin
The same month in other years
Cite this page
Pet Drug Reports. January 2021: adverse event reports for animal drugs. https://petdrugreports.com/month/2021-01/ Source: FDA Center for Veterinary Medicine, openFDA Animal and Veterinary adverse event reports, export of . Reports received through .
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 2021 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 711 reports of the 4,565 reports of January 2021 (15.6%).