After all, they've had five years of intense training, where most M.D.'s have taken a three-credit college course in pharmacology. Of course, they'd prescribe to a doctor's diagnosis.
This point is advanced by Emil Ciurczuk in his new blog, Poor Emil's Almanac, which starts off with the riddle "What do skyboxes at sports stadiums and Carribbean trips have to do with drug education?
AMS
