Imidacloprid: adverse event reports in all combinations

Drug pages with imidacloprid

A report names a drug by its set of active ingredients. Each set with imidacloprid that has a drug page is in the table, in order of name. The table has 2 sets.

Signs that the reports 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 29,337 reports that list the sign. One report can list more than one sign and more than one drug.

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

1. Lack of efficacy (ectoparasite) - flea[the product did not have the expected effect: fleas]16.1%4,725 reports
2. Lethargy[unusually tired or inactive]11.3%3,314 reports
3. Pruritus[itching]10.5%3,073 reports
4. Vomiting9.3%2,730 reports
5. Behavioural disorder NOS[behaviour change, type not specified]8.3%2,443 reports
6. Hypersalivation[drooling]6%1,773 reports
7. Anorexia[not eating]5.4%1,595 reports
8. Diarrhoea[diarrhea]5.3%1,544 reports
9. Application site alopecia[hair loss where the product was applied]4.5%1,308 reports
10. Ataxia[unsteady, uncoordinated movement]4.3%1,266 reports
11. Other abnormal test result NOS[abnormal laboratory result, type not specified]4.1%1,216 reports
12. Lack of efficacy (endoparasite) - heartworm[the product did not have the expected effect: heartworm]3.3%975 reports
13. Hyperactivity3.2%933 reports
14. Accidental exposure[exposure that was not intended]2.9%847 reports

Download all signs (CSV)

Reports by species

• Dog60.8%17,831
• Cat31.5%9,231
• Human exposure1.9%557
• Rabbit0.1%39
• Ferret0.1%21
• Cockatielunder 0.1%7

Reports for each month, Jul 2021 to Jun 2026

The month is the month in which FDA received the report. Each chart has its own scale. 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.

Reports by year

• Dog
• Cat
• Horse
• Other or not given

2026 has the reports that FDA received through Jun 2026. Download the years (CSV)

What the reports record

Each share of kind and age is of the 29,337 reports that name imidacloprid.

FDA pages for this ingredient

• How to Report Animal Drug and Device Side Effects and Product ProblemsThe FDA page that tells an owner or a veterinarian how to send a report.
• Green Book record of NADA 141-208The FDA record of the application for Advantage DUO.
• Green Book record of NADA 141-251The FDA record of the application for Advantage Multi for Dogs.
• Green Book record of NADA 141-435The FDA record of the application for Advantus.
• Green Book record of ANADA 200-615The FDA record of the application for Imoxi Topical Solution for Dogs.
• Green Book record of ANADA 200-700The FDA record of the application for Parasedge Multi for Dogs.
• Green Book record of ANADA 200-716The FDA record of the application for Midamox for Dogs.
• Animal Drugs @ FDAThe search page of the Green Book, the FDA list of approved animal drugs.

The site checked these addresses on 2 Oct 2026. The links open in a new tab.

Cite this page

Pet Drug Reports. Imidacloprid, all combinations: adverse event reports that FDA received. https://petdrugreports.com/ingredient/imidacloprid/ 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

Questions about these reports

Which brand are these reports about?

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. The Green Book section of this page lists brand names with this active ingredient.

Do the reports show that the ingredient caused the signs?

No. A report can name more than one drug, and a drug can have more than one active ingredient. FDA states this about the data.

When looking at the results, be aware that there is no certainty that the reported drug or device caused the adverse event.

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. Source: Adverse Event Reports for Animal Drugs and Devices

How many reports did FDA receive in the latest 12 months?

FDA received 886 reports in the 12 months to June 2026. It received 1,127 reports in the 12 months before. 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.

What kinds of report are in the count?

Of the 29,337 reports received from June 2006 to June 2026, 78.3% are about a safety issue only. 14.6% are about a lack of expected effectiveness, alone or with a safety issue. 7% are about a defect of the product or its package.