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Ask Dr. Michael Salkin Your Own Question
Dr. Michael Salkin
Dr. Michael Salkin, Veterinarian
Category: Dog
Satisfied Customers: 34283
Experience:  University of California at Davis graduate veterinarian with 45 years of experience.
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My cavapoo had his first injection today .he is very sleepy

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My cavapoo had his first injection today .he is very sleepy but every time he wakes up he yelps very loudly for a couple of seconds .then he goes back to sleep is this normal

You're speaking to Dr. Michael Salkin. Welcome to JustAnswer. I'm currently typing up my reply. Please be patient. This may take a few minutes.

Gillian, it appears that he's having both a local (pain at the injection site) and systemic delayed hypersensitivity reaction (somnolence/sleepiness) to his vaccine(s). These reactions usually abate within 36 hours from the injection unaided but you can dose him with a small dose of the antihistamine chlorphenamine (Piriton) - just 1 mg - at 12 hour intervals which should be helpful. If not, his vet can inject him with a fast-acting glucocorticoid (steroid) such as prednisolone which will be more effective than the antihistamine. He isn't experiencing the dangerous anaphylactic allergic reaction and so he should remain safe albeit uncomfortable. Please respond with further questions or concerns if you wish.

Customer: replied 8 months ago.
Should i leave him quietly over night and see how he is tomorrow then before taking him back

Yes, that would be prudent. It's likely he'll wake up well. Please continue our conversation if you wish.

Customer: replied 8 months ago.
Thank you . He has had some water and been to the toilet but is very sleepy. His breathing is fine just hate hearing him yelp so much 8

This, too, shall pass, Gillian. I can't set a follow-up in this venue so please return to our conversation - even after rating - with an update at your convenience. You can bookmark this page for ease of return.

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Thank you for your kind accept. I appreciate it.