I have not heard back from you and as this is a quick absorbing drug (so time is limited), I do want to leave some information here on what you need to do in this case. Now assuming the worst case scenario, if Ixy is only ~15lbs, then any dose over 0.47mg would be an overdose for her size and could cause adverse signs. So, if she had more then that, we'd be in a risky situation. Now onset of signs can arise within 30 minutes or take a few hours to develop, so we do need to act quickly. And specifically this can cause GI upset (vomiting, diarrhea),wobbliness, depression, vocalization, agitation, increased heart rate,tremors, and seizures.
Now if it has been less then 30 minutes, we can induce vomiting now. To do so at home, you can administer 3% hydrogen peroxide orally at a dose of 1ml per pound. (2 teaspoons per 10 pounds of body weight). You can give it via dropper, syringe, turkey baster – we just want to get it in. After giving this orally, move the abdomen around or get your wee one walking about to get things mixing. This should usually lead to vomiting. If it is unsuccessful after 10 minutes then it can be repeated twice more. And if we still have no vomiting, then you'd need to consider seeing your local vet (or ER vet) so that apomorhpine (a very strong injectable emetic) can be administered just get this out of the stomach and avoid any adverse issues.
As well or alternatively (if we cannot get her vomiting), you can also consider administering activated charcoal at this stage. This is available over the counter from the pharmacy (ask for the high strength version, not the one for gas) and works by binding any remaining material in the stomach. For activated charcoal, we tend to give 1-4 grams per pound every 8 hrs. This can be mixed with food to be fed or with water to syringe feed (do note that it stains, so keep it away from white carpets/clothes). This will just limit how much is absorbed and reduce the intoxication risk here.
Finally, after the above, we do want to try to address any potential GI upset here for the next 24-48 hours. To do so, you can consider offering a light diet option for a few days. Examples of an easily digestible diet include cooked white rice with boiled chicken,boiled white fish, scrambled egg, or meat baby food (as long as its free from garlic or onion powder). Ideally, we want to offer this as small frequent meals to keep the stomach settled. Further to this, we can also treat with an antacid. There are a number of antacids that are available over the counter and pet friendly. I would advise only treating with one, but the two I tend to use are: Pepcid (More Info/Dose @http://www.petplace.com/article/drug-library/library/over-the-counter/famotidine-pepcid)or Zantac (More Info/Dose @ http://www.petplace.com/article/drug-library/library/over-the-counter/ranitidine-hcl-zantac).These are usually given 20 minutes before offering food (to allow absorption)and of course you want to double check with your vet before use if your wee one has any pre-existing health issues or is on any medications you haven' t mentioned.
Overall, this is a drug with a very narrow safety margin in dogs and the risk of adverse signs is often high. Therefore, if she just had this we need to act quickly with the above. If we cannot get her to bring this back up, she has signs, or it has been longer; then we'd need to consider having her seen by her local vet for symptomatic care +/- IV fluids to help limit harm and get this to pass through her system quickly.
Just in case you need a local emergency vet, you can check @ http://www.vetlocator.com/or via
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