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Dog confused, panting, weak after morphine & Loxicam injection?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | spayed | 12 years and 4 months old

Dog has hd morphine and loxicam injection initially okay now panting and moaning back legs very weak seems confused and agitatd

1 Answer

Most Helpful Answer

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Answered By Juliana, DVM

Veterinarian

Published on February 25th, 2018

I’m sorry to hear Mutley is under the weather. It is very common for dogs to be somewhat agitated , often whining or panting a lot, as a side effect of morphine. These side effects can last up to 6 hours after the injection. Keeping him in a quiet, calm, low light environment may help. It’s hard to know why his back legs seem weaker without knowing why the pain medications were initially given. If they were given for back pain for example, and the back legs are getting progressively weaker I would be worried about something even like an intervertebral disc issue. But if the medications were given for another source of pain, some weakness can be due to the sedative effects of the morphine. The other medication given is an anti inflammatory medication and should not cause any of these signs. If it has been several hours since the injections and he is just starting to become agitated , It is also possible that Mutley is becoming painful again. Use oral pain medications as prescribed if any were sent home and call his veterinarian to check in if the agitation is worsening. I hope Mutley is feeling better very soon.

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