For Industry

Questions and Answers: Summary Report on Antimicrobials Sold or Distributed for Use in Food-Producing Animals

Section 105 of the Animal Drug User Fee Amendments of 2008 (ADUFA 105) requires that animal drug companies annually report to FDA the amount of antimicrobial drugs they sell or distribute for use in food-producing animals. ADUFA 105 also requires FDA to issue annual summary reports of the sales and distribution data.

Starting in 2014, FDA increased the amount of data included in its annual summary reports. FDA’s annual summary reports now include additional data tables on the importance of each drug class in human medicine, the approved routes of administration for these antimicrobials, whether these antimicrobials are available over-the-counter or require veterinary oversight, and whether the antimicrobial drug products are approved for therapeutic purposes, or for production purposes or both therapeutic and production purposes.


Why does the FDA collect this information?
How do the sales and distribution data in this report translate to actual use?
What information does the FDA now include in the annual summary report?
Where can I find the FDA’s annual summary reports from previous years?
How do the data in FDA’s annual summary reports compare to the estimates of antimicrobial drug sales or distribution data that have been reported by other organizations?
Why are drug sponsors that manufacture and distribute antimicrobial drugs not named in the summary report?
How do the data collected for animal use compare to the amount of antimicrobial drugs used in humans?
Does a summary report exist for antimicrobial sales and distribution for human drugs?
Because some antimicrobial drug products for food-producing animals are also approved for use in companion animals, how much of an effect does the use of these drug products in companion animals have on trends in the sales of certain antimicrobial classes, as reported in the Summary Report on Antimicrobials Sold or Distributed for Use in Food-Producing Animals?
How much of the recent increases in domestic sales as reported in the 2015 Summary Report on Antimicrobials Sold or Distributed for Use in Food-Producing Animals is likely attributable to drugs that are exported by distributors without the sponsors’ knowledge?


Why does the FDA collect this information?

Under ADUFA 105, Congress requires animal drug sponsors (i.e., drug manufacturers) to annually report to FDA on the amount of antimicrobial active ingredient in the drug products they sell or distribute for use in food-producing animals.

ADUFA 105 only requires sponsors to list the target animals and production classes specified on the approved labels of the products. It does not require animal drug sponsors to break out the total sales or distribution data by individual food-animal species. Starting with 2016 sales and distribution data, animal drug sponsors will additionally be required to provide species-specific estimates of product sales and distribution for use in the major food-producing animal species (cattle, swine, chicken, and turkeys). Information for each calendar year must be submitted to FDA by March 31st of the following year.

ADUFA 105 also requires that FDA provide summaries of this sales and distribution information, by antimicrobial class for classes with three or more distinct sponsors, while protecting both national security and confidential business information.

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How do the sales and distribution data in this report translate to actual use?

These sales and distribution data only reflect the total quantity of antimicrobial drug product that enters the market, and does not represent how much or in what way these drugs are ultimately used. For instance, the sales and distribution data that FDA currently collects are not broken out by species, although many of these products are approved for use in multiple species. Additionally, drug products entering the market may not necessarily be distributed all the way to the farm; veterinarians and animal producers may purchase drugs in anticipation of using them but never actually administer them to animals.

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What information does the FDA now include in the annual summary report?

The report format contains information, including data tables on the importance of each drug class in human medicine, provides aggregate data on the approved routes of administration for these drug products, whether they are available over-the-counter or require veterinary oversight, and whether they are approved for use for therapeutic purposes, or for production purposes or both therapeutic and production purposes.

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Where can I find the FDA’s annual summary reports from previous years?

These reports and additional information on ADUFA can be found at: http://www.fda.gov/ForIndustry/UserFees/AnimalDrugUserFeeActADUFA/ucm042896.htm.

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How do the data in FDA’s annual summary reports compare to the estimates of antimicrobial drug sales or distribution data that have been reported by other organizations?

FDA’s annual summary report is not directly comparable to other reported estimates of antimicrobial drug sales or distribution. The summary report includes data on the quantity of antimicrobial drugs sold or distributed for use in all food-producing animal species for all purposes, both therapeutic and non-therapeutic, and includes all dosage forms. Other reported estimates have included different categories of antimicrobials and used different sources of information; thus, they cannot be directly compared to FDA’s annual summary report.

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Why are drug sponsors that manufacture and distribute antimicrobial drugs not named in the summary report?

ADUFA section 105 requires FDA to summarize sales and distribution data by antimicrobial drug class. As directed by Congress, no individual sponsors are publicly identified in the summary report in order to protect confidential business information. In addition, ADUFA 105 specifies that data from antimicrobial drug classes with fewer than three distinct sponsors only be included in aggregated form in this report.

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How do the data collected for animal use compare to the amount of antimicrobial drugs used in humans?

Before comparing human and animal sales and distribution data, there are several differences in the circumstances of use of antimicrobial drugs in human and veterinary medicine that must be carefully considered, including:

  • Sizes of human and animal populations
  • Physical characteristics (e.g., weight and physiology)
  • Intended indications/uses
  • Duration of treatment and dosage

It is also important to note that for human antimicrobial drugs, these sales data represent the volume of product being sold to the various outlets from the manufacturer, not the volume of product being sold by the outlets to patients. Therefore, these sales data do not provide a direct estimate of human use. Similarly, the animal data represent a summary of the volume of product sold or distributed (through various outlets) by the manufacturer, and not the volume of product purchased by the end user for administration to animals.

Finally, the antimicrobial drug class known as ionophores, which are not used in human medicine and are not associated with antimicrobial resistance issues, contributes significantly to the total of antibiotics sold or distributed for use in food animals.

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Does a summary report exist for antimicrobial sales and distribution for human drugs?

Yes. Please see: http://www.fda.gov/Drugs/DrugSafety/InformationbyDrugClass/ucm261160.htm.

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Because some antimicrobial drug products for food-producing animals are also approved for use in companion animals, how much of an effect does the use of these drug products in companion animals have on trends in the sales of certain antimicrobial classes, as reported in the Summary Report on Antimicrobials Sold or Distributed for Use in Food-Producing Animals?

Of the more than 130 actively marketed, medically important antimicrobial products approved for use in food-producing animals in 2015, there are only 13 actively marketed drug products approved for both food-producing animals and companion animals. With the exception of one tetracycline medicated feed product, the other 12 products are approved for use in dogs, cats, and/or horses (in addition to food-producing animals), and collectively represented 147,298 kg of active ingredient domestic sales in 2015. There was a total of 9,701,978 kg of active ingredient domestic sales reported in 2015 for the medically important antimicrobial products. The one tetracycline medicated feed product is approved for use in psittacines (a subset of birds that includes parrots, macaws, and cockatoos), in addition to calves, cattle, chickens, sheep, swine, turkeys and ducks. Use of this product in psittacines is infrequent compared to use in the food-producing animal species. The use of these thirteen drug products in companion animals likely has little to no effect on trends in the overall reported sales of antimicrobial drugs.

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How much of the recent increases in domestic sales as reported in the 2015 Summary Report on Antimicrobials Sold or Distributed for Use in Food-Producing Animals is likely attributable to drugs that are exported by distributors without the sponsors’ knowledge? (See Summary Report on Antimicrobials Sold or Distributed for Use in Food-Producing Animals)

Individuals exploring this question should be aware that, in accordance with the law, the antimicrobial drug sales and distribution data provided to FDA and summarized in the Summary Report are only for FDA-approved, FDA-labeled products. Sponsors of FDA-approved antimicrobial products for food producing animals sometimes sell some of their products to drug distribution firms who, in turn, sell them to customers in the United States. There is the possibility that some of these distributors or customers might export some amount of these products without the sponsors’ knowledge. If the sponsor has no knowledge of such exportations, the sponsor would report them as part of the domestic sales and distribution. However, the FDA does not believe that such unknown exportation happens to any significant extent, if at all. Many other countries have their own approval process for animal drugs, so these countries would not likely be importing and using the FDA-approved, FDA-labeled products, but rather animal drug products that are approved and specifically labeled for use in their own country. Further, the trends in increased sales and distribution apply to a wide variety of different products representing most antimicrobial drug classes and dosage forms. Increasing exportations involving so many different animal drug products is considered as unlikely.

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Page Last Updated: 12/22/2016
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