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Was the ingestion within the hour?
This is a very large dose for a dog this size, so if she just ate it and we can get her to vomit the pill up straight away, that is going to be our best course of action
If the dog just ingested this medication and you have some hydrogen peroxide at home, I would administer 1 teaspoon by mouth. You can soak a small piece of bread in the hydrogen peroxide to make it go down easier
If you do not have any peroxide at home, then I would recommend taking your pet to a 24 hour veterinarian. They can induce vomiting there and the medication they will administer will have its effect within minutes
This amount of deramaxx is very toxic to a 10 lb dog, so if the pill is not produced intact in the vomitus rapidly, then I recommend your pet be seen by a veterinarian as soon as possible tonight. If you are able to retrieve the pill from the vomitus, I would still recommend you take your pet to be seen tomorrow as follow up will be necessary even with a partial ingestion
You should not give any more peroxide sooner than 15 minutes. Honestly, this amount is so toxic that I would start driving to a 24 hour veterinarian. If she vomits it up on the way there, then you may be in luck, but time is somewhat of the essence.
An ingestion of that amount if not treated can lead to kidney failure. I am not saying any of this to scare you, but I just want to make sure your doggie gets the dermamaxx out of her system as soon as possible.
If it has been 15 minutes, you can repeat the dose of hydrogen peroxide. You can increase it to 10 mLs which is equivalent to 2 teaspoons. I do think even if she vomits after that, she should still be seen this evening, so hopefully your veterinarian gets back to you soon so she can be evaluated and treatments can be started to try and prevent any lasting damage from the ingestion. I am so sorry you are having to go through this, I know how stressful it must be.
Still no vomiting? Have you repeated the hydrogen peroxide? Is the emergency vet able to see your pet tonight?
Poison control is basically going to tell you that this is a very serious overdose and your pet needs to be decontaminated. This entails inducing vomiting, followed by administration of activated charcoal. Hospitalization for fluids to be administered is often required.
I am so sorry this is happening to you! Go ahead and give the peroxide, but please know with the amount of time that has elapsed that even with vomiting, there is still going to be some follow up needed. I would still plan to have your pet seen as soon as possible. I am sorry I cannot offer more support from a distance, but we just need to get this doggie to vomit as quickly as possible. Unfortunately, if she does not vomit with the hydrogen peroxide, than there is not much else that you can do short of getting her to the vet. What part of the country are you in? Maybe I can help you locate a 24 hour animal urgent care?
I need to sign off for the evening. I am sorry I wasn't able to provide you with more help from here. I really hope your doggie does OK. Please feel free to respond here with an update or any additional questions.
What a stressful night you had! I am so happy you were able to get her in for decontamination. Its excellent that he baseline kidney values were normal. I would concur with the recommendation to have them rechecked in 48 hours, or sooner if anything seems abnormal. It will be good to keep her on some medication to help ease an upset tummy since both the deramaxx and the hydrogen peroxide can be quite irritating to the lining of the stomach and esophagus.
Please don't hesitate to reach out with an update or any additional questions.