Methadone is a powerful opioid medication that is used to treat opioid addiction. It is often prescribed to individuals who have become dependent on other opioids, such as heroin. Unfortunately, it is not always easy to find a pharmacy that carries methadone, and even if it is available, it may be difficult to get it in a timely manner. Fortunately, online pharmacies make it easy to buy methadone online and have it delivered right to your door.