My cat ate my dog's phenobarbital. Is this an emergency for her?

Unfortunately you do not mention the weight of the dog which received the phenobarbital. A normal dose would be 2-3 mg of phenobarbital per kg (2.2 lbs) of dog. If your dog is much smaller than 6 kg (13lbs) then you need to watch it closely for the next few hours. Your dog will most likely get very sleepy. If it sleeps so deep you cannot wake it up or if you think it is not breathing properly, you will need to take it to the emergency room. If the ingestion occurred within the last hour and the amount ingested was a significant overdose, you should consider taking your dog to the emergency vet so that vomiting can be induced to get the drug out of the system. Also if your dog has liver disease, please take it to the emergency clinic.

Thank you for reaching out to Pet Coach. This should not be of major concern but may cause some mild sedation in your dog that ingested that dose unnecessarily. If your dog is on medications as well, phenobarbitol may or may not be OK to combined with those medications so that is something else to consider. As well as dogs that have decrease in liver function may process this drug a bit differently. If your springer is otherwise healthy and not on any medications, then sedation (if anything) may be the only problem.

A single dose for a dog half the bodyweight is unlikely to cause any significant effects. I would not be overly concerned but monitor for any nervous system signs and report to your vet if you notice any abnormal symptoms

While you certainly could see symptoms at this dose it technically is within the dosing range. This dose of phenobarbital could cause sedation and/or lack of coordination. If Cinnamon seems very sedate or if she’s having trouble breathing you should head to an emergency clinic. If it’s at all possible that she ate more than one tablet or if you can’t monitor her through the night you may want to consider the ER now.

Hello and thank you for contacting Petco Pet Education Center, formerly Petcoach. Opie will be fine. He may show signs of sedation, lethargy and sleepiness for 8-12hrs but there should not be any more worrying signs. Please, continue with the next dose of phenobarbital as normal.

Thank you for contacting Petco Pet Education Center, formerly Petcoach with your question. Oh no, poor Luna. Even if she only ingested 6mg, that's double the highest recommended dose for a cat her weight. Too much clonazepam can lower the blood pressure, leading to weakness or collapse. In a senior cat, low blood pressure can be very serious. I'm not sure why you have no way of getting her to a vet, but she does need to see one immediately to make sure everything is ok. I would see if you could have a friend or family member take you into the vet, or call a cab or Uber to have her seen now. Best of luck.

Thanks for using Petco Pet Education Center, formerly Petcoach! Those are likely side effects from the phenobarbital. For that reason, I would highly recommend that you contact your veterinarian as they may decide to decrease his dose of phenobarbital based on this. Best of luck!