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My dog had a bad pre-spay injection reaction. Any long-term damage?

Updated On September 23rd, 2025

Hello - hope you can help me. My giant Schnauzer pup had a pre med injection before proposed spaying op. The injection was given into a vein instead of muscle and she bled quite badly. The op didn’t take place. She was quite poorly and wobbly for 18 hours - we were told she’d be fine within 4 hours. The vet doesn’t seem to think they did anything wrong. She has had blood test to check her clotting ability - it’s come back perfect. Would this ‘mistake’ cause any long term damage? Thank yo

1 Answer

Most Helpful Answer

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Answered By Ana M, DVM

Veterinarian

Published on October 5th, 2018

Thank you for submitting your question regarding your puppy. I am sorry to hear of her recent experience. Injections prior to surgery can be given under the skin, in the muscle or directly into the vein. So the location of her injection is not as worrisome as the bleeding afterwards. I am glad the her clotting times were ok. She should have a CBC checked as well and potentially be screened for a disorder known as Von Willebrand disease. If these tests are all normal, then you can proceed with her spay. As far as being groggy, different drug doses may be recommended prior to her next procedure. Some dogs are more sensitive to others to drugs and that cannot be predicted ahead of time. A note in her file can be made though. I hope this information helps! I do not suspect she will have any longterm damage from the incident.

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