Moxidectin (ProHeart, Coraxis): adverse event reports that FDA received

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 58,630 reports that list the sign. One report can list more than one sign.

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

1. Vomiting18.4%10,774 reports
2. Lack of efficacy (endoparasite) - heartworm[the product did not have the expected effect: heartworm]15.2%8,908 reports
3. Anaphylaxis[sudden severe allergic-type reaction]8.6%5,038 reports
4. Lethargy[unusually tired or inactive]8.2%4,791 reports
5. Facial swelling7.9%4,638 reports
6. Lack of efficacy (endoparasite) - hookworm[the product did not have the expected effect: hookworms]7.6%4,462 reports
7. Diarrhoea[diarrhea]6.1%3,567 reports
8. Hives5.7%3,357 reports
9. Ineffective, heartworm larvae[legacy FDA term: the product did not have the expected effect (heartworm larvae)]4.2%2,447 reports
10. Depression[dull, quiet or withdrawn]3.8%2,203 reports
11. Anorexia[not eating]3.7%2,177 reports
12. Pale mucous membrane[pale gums]3.4%1,969 reports
13. Death3.3%1,939 reports
14. Fever3.3%1,917 reports

The list shows 30 of 2,033 coded signs. A report is not proof that a drug caused a sign. Download all signs (CSV)

Reports by species

• Dog86.3%50,596
• Horse2.3%1,369
• Cattle2.2%1,319
• Human exposure0.4%259
• Goat0.2%95
• Sheep0.1%57

The share is of all 58,630 reports that name moxidectin. The other reports give a different species or no species.

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 bar is on a scale of 0 to 100%.

Other pages with this ingredient

A report names a drug by its set of active ingredients. Each set has its own page. The list is in order of name.

• Moxidectin, all combinations
• Afoxolaner + Moxidectin + Pyrantel Pamoate
• Fluralaner + Moxidectin
• Imidacloprid + Moxidectin
• Lotilaner + Moxidectin + Praziquantel + Pyrantel Pamoate
• Moxidectin + Praziquantel
• Moxidectin + Pyrantel Pamoate + Sarolaner

Next in the A to Z list

• Mometasone Furoate Monohydrate + Orbifloxacin + Posaconazole
• Monensin
• Monensin + Tylosin
• Monensin + Tylosin Phosphate
• Mupirocin
• Mycophenolate

All drugs by active ingredient. Brand names A to Z

FDA pages for this drug

• 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 141-051The FDA record of the application for ProHeart.
• Green Book record of NADA 141-189The FDA record of the application for ProHeart 6.Client Information Sheet of ProHeart 6 (PDF): a label document that FDA posts with the record.Package Insert of ProHeart 6 (PDF): a label document that FDA posts with the record.
• Green Book record of NADA 141-417The FDA record of the application for Coraxis.
• Green Book record of NADA 141-519The FDA record of the application for ProHeart 12.Client Information Sheet of ProHeart 12 (PDF): a label document that FDA posts with the record.Package Insert of ProHeart 12 (PDF): a label document that FDA posts with the record.
• Green Book record of NADA 141-087The FDA record of the application for Quest Gel.
• Green Book record of NADA 141-099The FDA record of the application for Cydectin (moxidectin) Pour-On for Beef and Dairy Cattle.
• 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. Moxidectin: adverse event reports that FDA received. https://petdrugreports.com/drug/moxidectin/ 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 the brand names with this active ingredient.

Do the reports show that the drug caused the signs?

No. 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 4,428 reports in the 12 months to June 2026. It received 4,055 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 58,630 reports received from September 1997 to June 2026, 55.8% are about a safety issue only. 35.6% are about a lack of expected effectiveness, alone or with a safety issue. 8.4% are about a defect of the product or its package.