Amazon announced it will launch a new subscription drug service dubbed Amazon RxPass to complement its existing pharmaceutical products. The service, which will offer generic medications for $5 a month with Prime membership, will be the latest attempt by the online retail behemoth to make waves in the healthcare space. And, as part of our Econ Extra Credit series, we delve into the extreme fitness industry with Stephen Mayville, a Reno-based psychologist who studies muscle dysmorphia and steroid misuse.