Is Cats Safe?
Is Terramycin (eye ointment) Safe for Cats?
Caution — Terramycin (eye ointment) can be risky for cats.
Terramycin (eye ointment) isn't classed as outright toxic, but it warrants caution around cats — FDA-approved and widely used for feline eye infections, but it contains polymyxin B, which has rarely caused anaphylaxis in cats — so use only as prescribed and watch closely.. When in doubt, keep it out of reach and ask your veterinarian.
| Category | Medicine |
|---|---|
| Toxic principle | FDA-approved and widely used for feline eye infections, but it contains polymyxin B, which has rarely caused anaphylaxis in cats — so use only as prescribed and watch closely. |
| Also known as | terramycin, oxytetracycline polymyxin, eye ointment |
Signs to watch for in cats
- Most cats tolerate it
- Rarely facial swelling
- Weakness
- Vomiting
- Breathing distress within hours of application. Use only as prescribed
- Stop and seek care for any acute reaction
If your cat may have been exposed to Terramycin (eye ointment):
- Don't wait for symptoms; don't induce vomiting unless a professional tells you to.
- Note what and how much, and take any packaging with you.
- Call your vet or a 24/7 line now — Pet Poison Helpline 855-764-7661 · ASPCA 888-426-4435.
Cat-safe alternatives
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Frequently asked questions
Is Terramycin (eye ointment) safe for cats?
Terramycin (eye ointment) is best treated with caution — it isn't classed as toxic but can cause problems for cats in some forms or amounts.
What are the symptoms if a cat is exposed to Terramycin (eye ointment)?
Reported signs include: Most cats tolerate it, Rarely facial swelling, Weakness, Vomiting, Breathing distress within hours of application. Use only as prescribed, Stop and seek care for any acute reaction.
What makes Terramycin (eye ointment) toxic to cats?
The harmful component reported for Terramycin (eye ointment) is FDA-approved and widely used for feline eye infections, but it contains polymyxin B, which has rarely caused anaphylaxis in cats — so use only as prescribed and watch closely.. Cats metabolise many such compounds poorly, so even small exposures can cause problems.
How much Terramycin (eye ointment) is dangerous to cats?
There is no established "safe" amount — sensitivity varies by cat, and small exposures can still cause signs. Treat any exposure as potentially serious rather than waiting to see how much was involved.
What should I do if my cat ate Terramycin (eye ointment)?
Contact your vet or a 24/7 animal poison line right away: Pet Poison Helpline (855-764-7661) or ASPCA Animal Poison Control (888-426-4435).