How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask nekovet Your Own Question
nekovet, Veterinarian
Category: Dog
Satisfied Customers: 22463
Experience:  Hello, I am a small animal veterinarian and am happy to discuss any concerns & questions you have on any species.
Type Your Dog Question Here...
nekovet is online now

My puppies are showing signs of dewormer overdose

Customer Question

My puppies are showing signs of dewormer overdose (lethargic, weak, wobbly, falling over, shaking, no appetite, not drinking water). Some resources say these signs will pass in 24 hours, others say take them to a vet. Should I wait it out as some suggest? What will a vet do for dewormer overdose? I worry about secondary side effects of dehydration since neither puppy will drink.
Submitted: 1 year ago.
Category: Dog
Expert:  nekovet replied 1 year ago.

Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you today.

In regards ***** ***** question, the approach to the situation depends on what wormer they were overdosed with (some can cause signs for up to 2 days), the dose relative to their weight, and how much time has passed. Often if we don't see these signs until 8-12 hours (peak affect), then we are usually ok to monitor. But if these signs are already present a few hours in, there is the potential for the pups to worsen and therefore they'd be best to be seen for IV fluids to flush out the drug, anti-nausea medication by injection, muscle relaxants +/- anti-seizure medication or appetite stimulants as needed.

So, it will depend on how many hours ago the overdose occurred to whether this is as severe as their signs will be or if it may get even more serious. If you are on the fence about having them seen, you will need to at least start supportive care as you monitor. But if they worsen at all, then they should be seen for the above vet treatment. Otherwise, you will need to keep things quiet, dimly lit, and calm. Doing so will at least decrease triggers for inducing seizuring. Otherwise, they need to eat/drink; especially since not doing so is going to dehydrate them but also crash their blood sugar (which can make them weak, wobbly, and seizure too). Therefore, you will need to tempt with both food and water. If they cannot take it, you may need to gently syringe feed fluids as well as watered down puppy food or meat baby food (avoid any with garlic/onion). If they are past a point where they are able to confidently swallow, you may need to start by rubbing a sugary syrup (ie glucose syrup, honey, karo syrup, pancake syrup, or even non-grape jam) onto the gums. This will get some sugar into them and hopefully perk them up for us. You can then follow it with feeding. Though if you see vomiting at any point, then again it would be an indication to have them seen for symptomatic care and fluids to get this out of their system before it can cause any harm.

Kind regards,

Dr. B.


If you have any other questions, please ask me – I’ll be happy to respond. **Please rate me afterwards by clicking on the "Rate my Expert' button at the top of the page as this is the only way I am credited for helping you. Thank you for your feedback!: )