My puppy vomited and is sleepy after dewormer. Is this normal?

Question

Hi my 4 month old Labrador had a bout of roundworms. He had a dewormer Milbemax yesterday at 2 pm. Today he seemed fine until this evening: he vomited and is now disinterested in eating and seems unreasonably sleepy. Is this a bad reaction or normal? We live in a small town with no emergency vet assistance so any advice would be helpful. Pet's info: Dog | Labrador Retriever | Male | unneutered | 35 lbs

Linda G, MS, DVM · Accepted Answer

Hello. Doom may be just a bit nauseous from the Milbemax dislodging all the roundworms, so see how he is feeling in the morning. If he still is lethargic, uninterested in eating & vomiting tomorrow, do contact your veterinarian to have him evaluated. Hopefully, he will be feeling better soon. Thanks for contacting Petco Pet Education Center, formerly Petcoach.

My puppy vomited and is sleepy after dewormer. Is this normal?

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