One of the medicines that are effective and prescribed by doctors for chronic pain treatment is acetaminophen. It is also known as Tylenol. Did you know that majority of the over-the-counter and prescribed medicines by doctors and pharmacist do have a good dose of acetaminophen? You must also keep in mind that you have to be extra careful in taking medicines for chronic pain relief. There is a possibility that one can suffer from liver damage once you have exceeded the standard amount intake of acetaminophen. I know some sufferers who are taking 2-3 acetaminophen pills in a day. Be careful. Consult your doctor.