eagles soar like any other birds on updrafts. So it depends upon the weather really. They can usually soar for about 15-20minutes or longer if air conditions are right. It depends. Given ideal wind conditions - lots of updrafts and thermal pockets, eagles can glide for hours.
In 1964, the effectiveness and usefulness of using methadone maintenance (i.e., using it as a substitute narcotic to prevent withdrawal) was realized. In the spring of 1971, methadone treatment for opiate dependence began to expand.
On the one hand, methadone is an opiate itself, binding to and activating mu-opioid receptors in the brain. It's this action which makes methadone a an opiate substitute that reduces cravings for harder opiates with more abuse potential, like heroin, morphine or fentanyl. Methadone does block the euphoric or mood-elevating effects of harder opiates. In other words, methadone activates mu-opioid receptors (just like morphine or heroin), but in a manner that doesn't elicit euphoria.