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Question:

Gave my cat expired antibiotics

I'm really panicking right now and could use some advice. I just realized I might have made a huge mistake with my cat, Bella. She's been fighting off a nasty respiratory infection, and her vet prescribed antibiotics last month. She seemed better but started sneezing again, so I panicked and gave her the leftover pills from last time. Afterwards, I noticed that the bottle expired two months ago. Bella seems fine for now, but I'm terrified I might have done more harm than good. Have I put her at risk? Should I rush her to the vet, or is there something I can do at home until tomorrow? I feel like the worst cat parent right now and just want to make sure she's okay. Any advice would be really appreciated.

Answer:

Hi there, I'm sorry to hear about your worries regarding the antibiotics. Let's chat about what happened. Generally, giving your cat expired antibiotics is not ideal, as the effectiveness of the medication can decrease past the expiration date. While it’s unlikely to be harmful, it also might not treat the issue it was prescribed for effectively.



Here are a few steps you can take to ensure your cat stays healthy: First, keep a close eye on them for any signs of an upset stomach, such as vomiting, diarrhea, or a decrease in appetite. Make sure they have plenty of water and offer their regular, balanced diet to support their well-being.



If your cat starts to show any of the issues I mentioned earlier, or if they seem lethargic or differently behaved, it’s essential to seek professional advice. This could mean the medication isn't working as expected or another underlying issue might be present.



For personalized and immediate advice, feel free to book a video consult with one of us at Dial A Vet. We can discuss your cat’s symptoms in more detail and guide you on what steps to take next.

Answered by

Louise - Senior Veterinary Nurse, Dial A Vet

June 22, 2025

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The "Ask a Vet" forum on Dial A Vet offers general information and helpful tips on pet health, but it's not a substitute for professional veterinary care. The advice here doesn't create a veterinarian-client-patient relationship, and our vets can't diagnose or treat your pet remotely. For emergencies or specific medical concerns, always contact your local veterinarian immediately. Your pet's health is unique, and decisions should only be made after consulting with a qualified professional. By using this forum, you acknowledge these limitations and agree to seek in-person veterinary advice for all your pet's health needs. View our content guidelines.
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