October 1997: adverse event reports received

577 reports in the openFDA release of 28 Sep 2026

Read this first · FDA's caveat, in its words

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

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Not veterinary advice. This site lists what was reported to FDA. For an animal that is unwell, contact a veterinarian.

577reports received

362same month a year earlier+59%

331monthly average, preceding 12 months

53.6%concern dogscats 9.7%

FDA's database holds 577 adverse event reports received in October 1997, against 362 in the same month a year earlier and a monthly average of 331 over the preceding 12 months.

53.6% of the month's reports concern dogs, 9.7% cats and 13.2% horses; the rest concern other species, exposed people, or give no species.

By active ingredient, the drugs named most often were carprofen (196), moxidectin (47) and ivermectin (26), and the terms listed most often were death (133), depression (64) and vomiting (54). Report volume has a seasonal shape, with more reports in the warmer months when parasite products are in heavier use.

The months around it

Drugs named most often, by active ingredient

Active ingredients recorded for the drug	Reports	Share of the month's reports
Carprofen	196	34%
Moxidectin	47	8.1%
Ivermectin	26	4.5%
Flunixin Meglumine	24	4.2%
Cyclosporine	21	3.6%
Atipamezole Hydrochloride	16	2.8%
Medetomidine	16	2.8%
Tiletamine Hydrochloride + Zolazepam Hydrochloride	15	2.6%
Pyrantel Pamoate	13	2.3%
Oxibendazole	12	2.1%
Tilmicosin Phosphate	12	2.1%
Melarsomine Dihydrochloride	11	1.9%
Cephapirin Sodium	9	1.6%
Lufenuron	9	1.6%
Enrofloxacin	6	1%

Ordered by report count, which follows how widely each drug was in use. FDA states that these data cannot be used to estimate risk or to compare one product with another. Brand and manufacturer names are masked by FDA in these records.

Signs listed most often

Death23.1%133
Depression[dull, quiet or withdrawn]11.1%64
Vomiting9.4%54
Accidental exposure[exposure that was not intended]9%52
Anorexia[not eating]8.7%50
No sign[no clinical sign was reported]8.5%49
Ataxia[unsteady, uncoordinated movement]6.2%36
Unclassifiable adverse event[event that fits no dictionary term]5.9%34
Convulsion[seizure]5.5%32
Death by euthanasia[the animal was euthanized]4.9%28
Elevated alanine aminotransferase (ALT)[a liver enzyme above the normal range]4.5%26
Diarrhoea[diarrhea]3.8%22
Elevated serum alkaline phosphatase (SAP)[a liver and bone enzyme above the normal range]3.8%22
Locking Mechanism Abnormal3.6%21
Icterus[jaundice (yellowing)]3.5%20

Single ingredients, pooled

Carprofen34%196

Moxidectin8.1%47

Ivermectin4.9%28

Flunixin Meglumine4.2%24

Cyclosporine3.6%21

Pyrantel Pamoate3.5%20

Atipamezole Hydrochloride2.8%16

Medetomidine2.8%16

Tiletamine Hydrochloride2.6%15

Zolazepam Hydrochloride2.6%15

Lufenuron2.3%13

Oxibendazole2.1%12

Species

Dog53.6%309

Cat9.7%56

Horse13.2%76

Other or not given23.6%136

Questions about October 1997

How many animal drug adverse event reports did FDA receive in October 1997?

577 reports are in the openFDA release of 28 Sep 2026. The same month a year earlier has 362.

Which drugs were named most often?

By active ingredient: carprofen (196), moxidectin (47), ivermectin (26), flunixin meglumine (24) and cyclosporine (21). Brands are masked in the public data.

Which signs were listed most often?

death (133), depression (64), vomiting (54), accidental exposure (52) and anorexia (50).

Can the count for a month still change?

Yes. FDA posts reports quarterly with a delay of three to six months, so the newest months are incomplete and usually grow in later releases. Older months change little.

Does a busy month mean something went wrong that month?

Not by itself. The date is when FDA received the report, not when the event happened, and volume follows season, product launches and publicity. FDA states that "there is no certainty that the reported drug or device caused the adverse event" and that the event "may have been related to an underlying disease, other drugs used at the same time or other non-drug related sources."

Where this comes from. Counts are built from the openFDA Animal & Veterinary adverse event bulk files released 28 Sep 2026, which hold reports FDA's Center for Veterinary Medicine received through 31 Mar 2026. openFDA masks brand and manufacturer names in these files, so drugs are counted by the active ingredients each record discloses and no figure is attributed to a brand, application or company. Ingredient names, and the separate reference lists of approved products, follow the FDA Green Book as of 1 Oct 2026. The month is the date FDA first received the report, not the date of the event. No report text, lot numbers or reporter details are published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.