Doramectin (Dectomax, Doracide): 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 4,771 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. Lack of efficacy (ectoparasite) - lice[the product did not have the expected effect: lice]22.8%1,090 reports
2. Pruritus[itching]11.5%550 reports
3. Death10.9%520 reports
4. Alopecia NOS[hair loss, type not specified]8.5%407 reports
5. Ineffective, lice biting[legacy FDA term: the product did not have the expected effect (lice biting)]7.9%376 reports
6. Accidental exposure[exposure that was not intended]6.4%303 reports
7. Lack of efficacy (lice)[the product did not have the expected effect: lice]5.8%279 reports
8. Caps, Abnormal[a product quality report, not a sign in an animal]5.8%277 reports
9. Unclassifiable adverse event[event that fits no dictionary term]4.8%231 reports
10. Vials, Leaking[a product quality report, not a sign in an animal]4.2%201 reports
11. Lack of efficacy - NOS[the product did not have the expected effect]4.2%200 reports
12. Ineffective, parasite(s) NOS[legacy FDA term: the product did not have the expected effect (parasite(s) nos)]3.3%156 reports
13. No sign[no clinical sign was reported]2.9%136 reports
14. Lack of efficacy (bacteria) - NOS[the product did not have the expected effect: target not specified]2.6%125 reports

The list shows 30 of 677 coded signs. A report is not proof that a drug caused a sign. Download all signs (CSV)

Reports by species

• Cattle67.9%3,238
• Human exposure6.2%298
• Pig3%142
• Dog2.4%116
• Sheep0.7%32
• Cat0.6%28

The share is of all 4,771 reports that name doramectin. 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.

• Doramectin + Levamisole Hydrochloride

Next in the A to Z list

• Dimethyl Sulfoxide + Fluocinolone Acetonide
• Dinoprost Tromethamine
• Diphenhydramine
• Dirlotapide
• Doxorubicin
• Doxycycline
• Doxycycline Hyclate

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 141-061The FDA record of the application for Dectomax Injectable Solution for Cattle and Swine.
• Green Book record of NADA 141-095The FDA record of the application for Dectomax Pour-on Solution for Cattle.
• Green Book record of ANADA 200-636The FDA record of the application for Doracide.
• Green Book record of ANADA 200-738The FDA record of the application for DectoGard.
• Green Book record of ANADA 200-750The FDA record of the application for Doraject.
• 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. Doramectin: adverse event reports that FDA received. https://petdrugreports.com/drug/doramectin/ 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 72 reports in the 12 months to June 2026. It received 51 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 4,771 reports received from October 1996 to June 2026, 59.6% are about a safety issue only. 22.4% are about a lack of expected effectiveness, alone or with a safety issue. 17.9% are about a defect of the product or its package.