Tylosin Phosphate (Tylan, Tylovet): 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 231 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. Death49.4%114 reports
2. Pneumonia[lung infection or inflammation]22.9%53 reports
3. Lameness21.2%49 reports
4. Respiratory tract disorder NOS[NOS: not otherwise specified]16.9%39 reports
5. Unclassifiable adverse event[event that fits no dictionary term]14.3%33 reports
6. Bloated12.6%29 reports
7. Ruminal bloat12.6%29 reports
8. Lack of efficacy - NOS[the product did not have the expected effect]12.1%28 reports
9. Behavioural disorder NOS[behaviour change, type not specified]9.5%22 reports
10. Peritonitis[inflamed abdominal lining]9.5%22 reports
11. Found dead8.7%20 reports
12. Lack of efficacy (bacteria) - NOS[the product did not have the expected effect: target not specified]8.7%20 reports
13. Death by euthanasia[the animal was euthanized]8.2%19 reports
14. Abscess NOS[NOS: not otherwise specified]5.6%13 reports

The list shows 30 of 269 coded signs. A report is not proof that a drug caused a sign. Download all signs (CSV)

Reports by species

• Cattle64.1%148
• Pig13.9%32
• Dog8.7%20
• Chicken3.9%9
• Human exposure1.7%4
• Horse0.4%1

The share is of all 231 reports that name tylosin phosphate. 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 May 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.

• Tylosin Phosphate, all combinations
• Monensin + Tylosin Phosphate

Next in the A to Z list

• Trilostane
• Trimethoprim
• Tulathromycin
• Tylosin
• Tylosin Tartrate
• Ursodiol
• Velagliflozin
• Verdinexor

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 012-491The FDA record of the application for Tylan 10, Tylan 40, Tylan 100, Tylan 100 CAL.
• Green Book record of NADA 046-415The FDA record of the application for Tylan 40.
• Green Book record of NADA 098-431The FDA record of the application for Tylan 20, Tylan 40.
• Green Book record of ANADA 200-484The FDA record of the application for Tylovet 40, Tylovet 100.
• 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. Tylosin Phosphate: adverse event reports that FDA received. https://petdrugreports.com/drug/tylosin-phosphate/ 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 18 reports in the 12 months to June 2026. It received 30 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 231 reports received from December 2009 to May 2026, 76.2% are about a safety issue only. 15.6% are about a lack of expected effectiveness, alone or with a safety issue. 7.8% are about a defect of the product or its package.