Dr. Feelgood

Refers to a physician or drug dealer who overprescribes or sells narcotics to a patient or purchaser, respectively. The term seems to originate in 1960 from a code name the United States Secret Service gave to Doctor Max Jacobson who developed a unique "energy formula" that altered the paths of some of the twentieth century’s most iconic figures, including President John F. Kennedy (JFK) and Jackie Kennedy, Marilyn Monroe, Frank Sinatra, and Elvis. JFK received his first injection (a special mix of “vitamins and hormones,” according to Jacobson) just before his first debate with Vice President Richard Nixon (1960). The shot into JFK’s throat not only cured his laryngitis, but also diminished the pain in his back, allowed him to stand up straighter, and invigorated the tired candidate. Kennedy demolished Nixon in that first debate and turned a tide of skepticism about Kennedy into an audience that appreciated his energy and crispness. What JFK didn’t know then was that the injections were actually powerful doses of a combination of highly addictive liquid methamphetamine and steroids.
In the late mid to late 1960s through the 1980s, the term "Dr. Feelgood" on the street seemed to specifically refer to a heroine dealer.

I'm hurting. I need to see Dr. Feelgood.