April 2015: 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 6,347 adverse event reports for animal drugs in April 2015. It received 5,903 reports in April 2014. The average of the 12 months before April 2015 is 5,700 reports for each month.

Of the 6,347 reports, 77.3% are about dogs, 7.6% are about cats and 1.1% 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, Oct 2013 to Oct 2015. The column with the outline is April 2015.

Reports by species

Dog77.3%4,907
Cat7.6%481
Horse1.1%67
Other species, or species not given14.1%892

Drug pages with reports received in April 2015

The table has every drug page with 10 or more reports that FDA received in April 2015, in order of name. No count decides which drug is in the table. The table has 69 drug pages.

Show the 69 drug pages

Drug pages with 10 or more reports received in April 2015, in order of name
Active ingredients	Reports received in April 2015
(S) - methoprene	57
Acepromazine Maleate	15
Afoxolaner	525
Amoxicillin + Clavulanate Potassium	34
Atipamezole Hydrochloride	11
Buprenorphine	40
Butorphanol Tartrate	18
Carprofen	154
Cefovecin sodium	76
Cefpodoxime proxetil	25
Ceftiofur Crystalline Free Acid	20
Cephalexin	22
Cyclosporine	74
Deracoxib	31
Dexmedetomidine hydrochloride	36
Diphenhydramine	22
Doramectin	14
Doxycycline	10
Emodepside + Praziquantel	31
Enalapril Maleate	10
Enrofloxacin	40
Eprinomectin	26
Famotidine	14
Febantel + Praziquantel + Pyrantel Pamoate	38
Fentanyl	11
Firocoxib	36
Fluralaner	426
Furosemide	16
Gentamicin Sulfate + Hydrocortisone aceponate + Miconazole Nitrate	26
Hyaluronate Sodium	14
Imidacloprid	22
Imidacloprid + Moxidectin	137
Insulin	68
Isoflurane	13
Ivermectin	114
Ivermectin + Praziquantel	12
Ivermectin + Praziquantel + Pyrantel Pamoate	92
Ivermectin + Pyrantel Pamoate	930
Ketamine Hydrochloride	25
Ketoconazole	11
Levothyroxine sodium	15
Lufenuron + Milbemycin Oxime	213
Lufenuron + Praziquantel	89
Maropitant	59
Melarsomine Dihydrochloride	96
Meloxicam	46
Methylprednisolone Acetate	17
Metronidazole	11
Miconazole Nitrate + Polymyxin B Sulfate + Prednisolone Acetate	14
Milbemycin Oxime	33
Milbemycin Oxime + Spinosad	1,635
Monensin	24
Moxidectin	176
Nitenpyram	77
Oclacitinib	109
Phenobarbital	15
Pimobendan	24
Polysulfated Glycosaminoglycan	20
Praziquantel + Pyrantel Pamoate	27
Prednisolone + Trimeprazine Tartrate	19
Prednisone	22
Propofol	11
Pyrantel Pamoate	29
Selamectin	228
Sevoflurane	15
Spinosad	593
Tiletamine Hydrochloride	10
Tramadol	29
Trilostane	66

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 6,347 reports of the month.

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

Emesis[vomiting]16.2%1,030 reports
Vomiting14.1%898 reports
Lack of efficacy - NOS[the product did not have the expected effect]13.9%882 reports
Lethargy[unusually tired or inactive]10.5%669 reports
Ineffective, heartworm larvae[legacy FDA term: the product did not have the expected effect (heartworm larvae)]7.3%465 reports
Diarrhoea[diarrhea]6.1%390 reports
Lack of efficacy (ectoparasite) - flea[the product did not have the expected effect: fleas]5.8%371 reports
Lack of efficacy (endoparasite) - hookworm[the product did not have the expected effect: hookworms]5.4%340 reports
Digestive tract disorder NOS[digestive problem, type not specified]5.1%323 reports
Anorexia[not eating]4.1%262 reports
Unpalatable[legacy FDA term: the animal would not take it]4%255 reports
Cardiac disorder NOS[heart problem, type not specified]3.5%219 reports
Ineffective, ascarids NOS[legacy FDA term: the product did not have the expected effect (ascarids nos)]3.2%206 reports
Other abnormal test result NOS[abnormal laboratory result, type not specified]3.1%196 reports

Show the next 1 signs

Seizure NOS[seizure, type not specified]3%192 reports

Ingredients, all combinations

The list has every active ingredient with 10 or more reports received in April 2015, in order of name. It has 71 ingredients.

Show the 71 ingredients

The same month in other years

Cite this page

Pet Drug Reports. April 2015: adverse event reports for animal drugs. https://petdrugreports.com/month/2015-04/ 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 April 2015 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?: "Emesis" is in 1,030 reports of the 6,347 reports of April 2015 (16.2%).