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.
It is an opioid agonist that causes effects similar to morphine but can last 24+ hours. It can cause overdose relatively easily and can be extremely addictive (like morphine).   Methadone is an opiate that is controlled. Under the Scheduled Substances Act (USA) it is Schedule II (also known as CII).