Ask a Dog Vet and Get Answers to Your Dog Veterinary Questions
Has he had tramadol before? Has he ever had a reaction to it or any other medication? If he has then I do not recommend giving him any medication until you can have him examined by a vet.
Legally speaking tramadol is a controlled substance and it is not lawful for me to recommend that you give a prescription medication to your dog, especially one that is controlled.
What I can tell you is that 100mg is within the dosage range that is typically prescribed for a dog that weighs 100lbs and may be expected to result in mild sedation.
Does this help you?