September 1998: adverse event reports received

532 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.

532reports received

346same month a year earlier+54%

591monthly average, preceding 12 months

61.7%concern dogscats 11.8%

FDA's database holds 532 adverse event reports received in September 1998, against 346 in the same month a year earlier and a monthly average of 591 over the preceding 12 months.

61.7% of the month's reports concern dogs, 11.8% cats and 6.6% horses; the rest concern other species, exposed people, or give no species.

By active ingredient, the drugs named most often were carprofen (172), atipamezole hydrochloride (50) and moxidectin (35), and the terms listed most often were death (89), accidental exposure (74) and death by euthanasia (67). 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	172	32.3%
Atipamezole Hydrochloride	50	9.4%
Moxidectin	35	6.6%
Selegiline Hydrochloride	26	4.9%
Amoxicillin	24	4.5%
Lufenuron	19	3.6%
Medetomidine	14	2.6%
Melarsomine Dihydrochloride	13	2.4%
Cyclosporine	8	1.5%
Tilmicosin Phosphate	8	1.5%
Monensin	7	1.3%
Doramectin	6	1.1%
Enrofloxacin	6	1.1%
Lufenuron + Milbemycin Oxime	6	1.1%
Diethylcarbamazine Citrate	5	0.9%

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

Death16.7%89
Accidental exposure[exposure that was not intended]13.9%74
Death by euthanasia[the animal was euthanized]12.6%67
Vomiting12.6%67
Depression[dull, quiet or withdrawn]11.8%63
Anorexia[not eating]11.5%61
No sign[no clinical sign was reported]10.7%57
Elevated serum alkaline phosphatase (SAP)[a liver and bone enzyme above the normal range]6.6%35
Elevated alanine aminotransferase (ALT)[a liver enzyme above the normal range]6.4%34
Diarrhoea[diarrhea]6%32
Ataxia[unsteady, uncoordinated movement]5.8%31
Fever4.9%26
PR-liver, lesion(s)[legacy FDA term: lesions found in the liver]4.9%26
Anaemia NOS[low red blood cell count]4.7%25
Unclassifiable adverse event[event that fits no dictionary term]4.7%25

Single ingredients, pooled

Carprofen32.3%172

Atipamezole Hydrochloride9.4%50

Moxidectin6.6%35

Selegiline Hydrochloride4.9%26

Lufenuron4.7%25

Amoxicillin4.5%24

Medetomidine2.6%14

Melarsomine Dihydrochloride2.4%13

Pyrantel Pamoate1.9%10

Praziquantel1.7%9

Cyclosporine1.5%8

Ivermectin1.5%8

Species

Dog61.7%328

Cat11.8%63

Horse6.6%35

Other or not given19.9%106

Questions about September 1998

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

532 reports are in the openFDA release of 28 Sep 2026. The same month a year earlier has 346.

Which drugs were named most often?

By active ingredient: carprofen (172), atipamezole hydrochloride (50), moxidectin (35), selegiline hydrochloride (26) and amoxicillin (24). Brands are masked in the public data.

Which signs were listed most often?

death (89), accidental exposure (74), death by euthanasia (67), vomiting (67) and depression (63).

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.