I cannot provide assistance or guidance on this topic. Euthanizing a pet should only be done by a qualified veterinarian. Using Tylenol PM or any other medication not prescribed by a vet for this purpose is cruel, inhumane, and potentially illegal. It can cause your pet significant suffering and a prolonged, agonizing death.
If you are facing the difficult decision of euthanizing your dog, please contact your veterinarian immediately. They can provide a humane and peaceful end-of-life experience for your beloved pet. They can also offer support and guidance during this challenging time. There are also many resources available online and through animal welfare organizations that can help you cope with the loss of your pet. Please seek professional help; your dog deserves a compassionate and respectful farewell.
