November 1998: adverse event reports received

658 reports in the openFDA release of 28 Sep 2026

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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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658reports received

944same month a year earlier-30%

595monthly average, preceding 12 months

57.9%concern dogscats 12.9%

FDA's database holds 658 adverse event reports received in November 1998, against 944 in the same month a year earlier and a monthly average of 595 over the preceding 12 months.

57.9% of the month's reports concern dogs, 12.9% cats and 6.2% horses; the rest concern other species, exposed people, or give no species.

By active ingredient, the drugs named most often were carprofen (225), amoxicillin (73) and moxidectin (36), and the terms listed most often were accidental exposure (116), death (101) and vomiting (100). 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	225	34.2%
Amoxicillin	73	11.1%
Moxidectin	36	5.5%
Selegiline Hydrochloride	30	4.6%
Dinoprost Tromethamine	28	4.3%
Etodolac	27	4.1%
Tilmicosin Phosphate	17	2.6%
Enrofloxacin	16	2.4%
Medetomidine	14	2.1%
Pyrantel Pamoate	12	1.8%
Tiletamine Hydrochloride + Zolazepam Hydrochloride	12	1.8%
Atipamezole Hydrochloride	10	1.5%
Ormetoprim + Sulfadimethoxine	10	1.5%
Oxibendazole	10	1.5%
Melarsomine Dihydrochloride	9	1.4%

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

Accidental exposure[exposure that was not intended]17.6%116
Death15.3%101
Vomiting15.2%100
No sign[no clinical sign was reported]12.6%83
Anorexia[not eating]10.5%69
Depression[dull, quiet or withdrawn]10.5%69
Unclassifiable adverse event[event that fits no dictionary term]9%59
Elevated serum alkaline phosphatase (SAP)[a liver and bone enzyme above the normal range]8.1%53
Elevated alanine aminotransferase (ALT)[a liver enzyme above the normal range]7.3%48
Diarrhoea[diarrhea]5.3%35
Elevated total bilirubin[bilirubin above the normal range]5.3%35
Icterus[jaundice (yellowing)]5.2%34
Death by euthanasia[the animal was euthanized]4.9%32
Elevated blood urea nitrogen (BUN)[a kidney value above the normal range]4.1%27
Ataxia[unsteady, uncoordinated movement]3.8%25

Single ingredients, pooled

Carprofen34.2%225

Amoxicillin11.1%73

Moxidectin5.5%36

Selegiline Hydrochloride4.6%30

Dinoprost Tromethamine4.3%28

Etodolac4.1%27

Pyrantel Pamoate2.6%17

Tilmicosin Phosphate2.6%17

Enrofloxacin2.4%16

Medetomidine2.1%14

Lufenuron2%13

Sulfadimethoxine2%13

Species

Dog57.9%381

Cat12.9%85

Horse6.2%41

Other or not given22.9%151

Questions about November 1998

How many animal drug adverse event reports did FDA receive in November 1998?

658 reports are in the openFDA release of 28 Sep 2026. The same month a year earlier has 944.

Which drugs were named most often?

By active ingredient: carprofen (225), amoxicillin (73), moxidectin (36), selegiline hydrochloride (30) and dinoprost tromethamine (28). Brands are masked in the public data.

Which signs were listed most often?

accidental exposure (116), death (101), vomiting (100), no sign (83) and anorexia (69).

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.