Hello, If you got the dewormer from your vet they need to be notified as soon as possible. If this was an over the counter dewormer please see a vet immediately. If your dog is sick and if she is not acting normally I recommend you seek immediate veterinary assistance at the emergency clinic. Please never buy or use OTC dewormers without your vets ok first. They are terribly toxic in my opinion and I have seen them cause more problems than they solve. A vomiting puppy should always be considered an emergency as they are very fragile and can… Read more »