Micotil 300 is a livestock antibiotic containing tilmicosin, and accidental human injection has been associated with severe cardiac effects and death. The FDA requires a product-specific shroud and syringe system, and its June 2026 label update added work-practice instructions; neither change eliminates the hazard. Anyone exposed through injection, mouth, skin, or eyes should seek medical care immediately.
What Micotil is—and why it is dangerous to people
Micotil 300 is a tilmicosin injection containing 300 mg/mL. The official U.S. label restricts it to subcutaneous use in cattle and sheep, by or on the order of a licensed veterinarian. It is not a pet medicine or for human use.
The label lists use for certain respiratory diseases in cattle and sheep. FDA warns that injection in people has been associated with fatalities. The cardiovascular system is a serious concern, and the outcome of an exposure cannot be predicted from the amount alone.
FDA says exposure by injection, mouth, skin, or eye warrants immediate medical care. It also states: “There is no antidote for Micotil 300.” Do not wait for symptoms or attempt home treatment.
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What changed in Micotil safety requirements
The safety response has two stages: physical access and delivery-device controls introduced in 2022, followed by added work-practice instructions in 2026.
| Stage | FDA labeling change | What it addresses |
|---|---|---|
| 2022 | A tamper-resistant shroud, a product-specific quick-fit connector, and a tube-fed safety syringe | Access to the vial and the specified delivery setup |
| 2026 | Work in a dedicated facility, secure the animal in a working chute, and work as a team | Conditions and practices during use |
The FDA’s 2022 labeling summary bars automatically powered syringes, single-use syringes, and other unspecified delivery devices. The label directs users to contact Elanco or their distributor for the specified syringe. Do not substitute generic equipment or improvise a delivery method.
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The FDA’s June 26, 2026 update added the dedicated-facility, secure-restraint, and team-work instructions. These requirements supplement—not replace—the product-specific equipment requirements and veterinary oversight. The sources do not establish how much either stage has reduced exposures, so the changes should not be treated as proof that the product is safe to handle casually.
What historical exposure figures mean
Historical figures come from different sources and measure different things. They are not current totals or a single estimate of present-day risk.
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| Figure | Source and period | What it counts |
|---|---|---|
| 2,392 | NIOSH, citing Elanco reports from 1992–2000; published in 2007 | Human exposure incidences reported to Elanco |
| 13 | NIOSH, reported in 2007 | Confirmed Micotil-associated deaths since 1995 |
| 156 reports (5% of reports) | Study authors, reports submitted March 1992–March 2005; published in 2006 | Serious adverse-effect reports, including cardiovascular symptoms and death |
| Approximately 2 per 1 million doses | Study authors, 2006 | Estimate of serious adverse effects from accidental exposure based on reviewed reporting data |
These figures have different periods, denominators, and measures. The study’s per-dose estimate is historical, not a current incidence rate or assurance of safety.
What to do after a suspected exposure
- Seek medical care immediately. Use local emergency services when appropriate. Do not wait for symptoms.
- Tell medical personnel the product was Micotil 300 or tilmicosin. Share the current product label or packaging if it is safe to do so.
- Follow emergency and toxicology professionals’ instructions. There is no established antidote or home treatment.
For a possible pet exposure, contact an emergency veterinarian immediately and identify the product as tilmicosin. Keep people and animals away from spilled product or contaminated equipment until it can be handled safely.
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Frequently Asked Questions
What is Micotil used for?
Micotil 300 is a tilmicosin injection labeled for certain respiratory-disease uses in cattle and sheep. Its U.S. use is restricted to or on the order of a licensed veterinarian.
Why is Micotil dangerous to humans?
FDA warns that human injection has been associated with severe cardiac effects and fatalities. Exposure through injection, mouth, skin, or eyes requires immediate medical care.
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- DURABLE AND HIGH QUALITY – The durable and high-quality sharps container is constructed of puncture and impact resistant material.
- PERFECT FOR PROFESSIONAL AND HOME USE – The sharps container is ideal for use in hospitals, labs, and clinics or at home by diabetics who need a container to dispose of biohazard needles and syringes waste.
- LIGHT WEIGHT AND STURDY – The sturdy light-weight container is perfect for phlebotomists (blood draw professionals) or others who need a 2 gallon sharps container. Use it at home or at work.
- EASY TO USE – Clear lid allows a view of the fill level; Locking slot for secure final disposal.
- STRICT QUALITY STANDARD – Each container is labeled with usage instructions to dispose of medical waste safely and responsibly. Meets OSHA and EPA requirements for local biohazard waste collection.
What syringe must be used with Micotil?
The FDA labeling specifies a product-specific quick-fit connector and tube-fed safety syringe. It bars automatically powered syringes, single-use syringes, and other unspecified delivery devices. Contact Elanco or the distributor for the specified equipment; do not substitute generic equipment.
Did the 2022 and 2026 changes make Micotil safe?
No. The changes add equipment and work-practice requirements, but FDA still warns of potentially fatal human exposure. Follow the current label and seek immediate medical care after any suspected exposure.
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