Breed · Dog
Basset Hound: adverse event reports
FDA breed label "Hound - Basset" · single-breed animals only
FDA's database holds 4,507 reports where the animal's breed is given as "Hound - Basset", shown here as Basset Hound: 0.5% of reports about dogs. Reports on crossbred animals are left out of breed pages.
147 reports arrived in the 12 months to March 2026, down 10% from 164 in the 12 months before. A breed's count mostly mirrors how common the breed is; registration and ownership figures by breed are not public data, so no per-animal rate can be given.
By active ingredient, the drugs named most often are ivermectin + pyrantel pamoate, milbemycin oxime + spinosad and spinosad. Ivermectin + Pyrantel Pamoate is named in 17.4% of this breed's reports, about the same share as in reports about all dogs (14.9%).
The terms listed most often are vomiting (20.2%), ineffective, heartworm larvae (13.2%) and emesis (7.4%). Vomiting appears in 20.2% of reports, about the same share as in all dog reports (19.7%). 38.1% of reports stating seriousness were classed as serious, against 38.3% for dogs overall.
Drugs named most often, by active ingredient
| Active ingredients recorded for the drug | Reports | Share of Basset Hound reports | Share of all dog reports |
|---|---|---|---|
| Ivermectin + Pyrantel Pamoate | 783 | 17.4% | 14.9% |
| Milbemycin Oxime + Spinosad | 637 | 14.1% | 13.1% |
| Spinosad | 288 | 6.4% | 5.8% |
| Carprofen | 272 | 6% | 4.8% |
| Milbemycin Oxime | 220 | 4.9% | 3% |
| Fluralaner | 201 | 4.5% | 6.7% |
| Melarsomine Dihydrochloride | 190 | 4.2% | 2.3% |
| Moxidectin | 182 | 4% | 5% |
| Afoxolaner | 164 | 3.6% | 5.7% |
| Selamectin | 160 | 3.6% | 3% |
| Pyrantel Pamoate + Sarolaner | 157 | 3.5% | 5.1% |
| Lufenuron + Milbemycin Oxime | 150 | 3.3% | 2.7% |
| Oclacitinib | 118 | 2.6% | 2.9% |
| Cyclosporine | 115 | 2.6% | 1.5% |
| Milbemycin Oxime + Praziquantel | 108 | 2.4% | 3.1% |
| Deracoxib | 68 | 1.5% | 1.1% |
| Ivermectin | 64 | 1.4% | 1.3% |
| Imidacloprid + Moxidectin | 48 | 1.1% | 1.3% |
| Ivermectin + Praziquantel + Pyrantel Pamoate | 48 | 1.1% | 0.9% |
| Nitenpyram | 39 | 0.9% | 1.1% |
Ordered by report count. Differences from the species column often come from body size (which drugs a breed is prescribed) and from how common the breed was in the years a drug sold most. 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 in reports
share of Basset Hound reports listing the termall dog reports
- Vomiting20.2%910
- Ineffective, heartworm larvae[legacy FDA term: the product did not have the expected effect (heartworm larvae)]13.2%595
- Emesis[vomiting]7.4%335
- Lethargy[unusually tired or inactive]7.4%332
- Diarrhoea[diarrhea]6.6%298
- Anorexia[not eating]5.8%260
- Lack of efficacy (endoparasite) - hookworm[the product did not have the expected effect: hookworms]5.5%247
- Lack of efficacy (endoparasite) - heartworm[the product did not have the expected effect: heartworm]5.3%240
- Depression[dull, quiet or withdrawn]4.7%210
- Lack of efficacy - NOS[the product did not have the expected effect]4.6%207
- Lack of efficacy (ectoparasite) - flea[the product did not have the expected effect: fleas]3.5%157
- Death3%134
- Elevated alanine aminotransferase (ALT)[a liver enzyme above the normal range]2.8%127
- Death by euthanasia[the animal was euthanized]2.6%118
- Weight loss2.5%111
- Digestive tract disorder NOS[digestive problem, type not specified]2.4%108
- Elevated serum alkaline phosphatase (SAP)[a liver and bone enzyme above the normal range]2.3%103
- Ineffective, ascarids NOS[legacy FDA term: the product did not have the expected effect (ascarids nos)]2.1%95
- Accidental exposure[exposure that was not intended]2%90
- Lack of efficacy (endoparasite) - whipworm[the product did not have the expected effect: whipworms]1.9%85
- Pruritus[itching]1.8%79
- Bloody diarrhoea[diarrhea with blood]1.7%78
- Cardiac disorder NOS[heart problem, type not specified]1.7%76
- Other abnormal test result NOS[abnormal laboratory result, type not specified]1.6%70
- Leucocytosis NOS[high white blood cell count]1.5%69
Age and weight
Age of the animal
Weight of the animal
Coloured bar: Basset Hound reports. Grey bar: all dog reports.
Trend and outcomes
Reports by month FDA received them. The newest months are incomplete because FDA posts reports with a delay of three to six months.
Outcome recorded in the report
Beside all dogs
| Measure | Basset Hound | All dogs |
|---|---|---|
| Reports | 4,507 | 985,675 |
| Latest 12 months | 147 | 53,292 |
| Classed serious, of reports stating it | 38.1% | 38.3% |
| Death or euthanasia recorded, per 1,000 reports | 57.5 | 55 |
Questions about Basset Hound reports
How many FDA adverse event reports involve Basset Hounds?
4,507 reports through March 2026, 0.5% of reports about dogs; 147 in the latest 12 months.
Which drugs are named most often in Basset Hound reports?
By active ingredient: ivermectin + pyrantel pamoate (783), milbemycin oxime + spinosad (637), spinosad (288), carprofen (272) and milbemycin oxime (220). Brands are masked in the public data.
What signs are reported most for this breed?
vomiting (20.2%), ineffective, heartworm larvae (13.2%), emesis (7.4%), lethargy (7.4%) and diarrhoea (6.6%).
Is the Basset Hound more sensitive to certain drugs?
Report counts cannot answer that. They show what was reported, not what a drug did, and they are not adjusted for how many Basset Hound animals exist or were treated. Breed-related drug sensitivities that are established are described on FDA-approved labels; a veterinarian is the person to ask about an individual animal.
Why are crossbreds not included?
FDA records crossbred animals with one or more component breeds. Counting them under each component would double count, so breed pages use single-breed reports only. Crossbreds remain in the species totals.
How do I report a problem?
Call the drug company using the number on the label, or send Form FDA 1932a to FDA. See the guide on how to report.
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 30 Sep 2026. Breed names are FDA's labels rearranged into everyday order ("Hound - Basset" becomes "Basset Hound"). 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.