Many commentators were outraged by the FDA's
announcement on Monday that Gilead received orphan drug designation for using the drug remdesivir to treat COVID-19. The backlash led to a quick about-face by Gilead, which
announced today that it is asking the FDA to rescind the orphan designation. For those trying to understand what happened here and the underlying policy questions, here's a quick explainer:
How could the Orphan Drug Act possibly apply to COVID-19?
Under
21 U.S.C. § 360bb(a)(2), a pharmaceutical company can request orphan designation for a drug that either (A) treats a disease that "affects less than 200,000 persons in the United States" at the time of the request or (B) "for which there is no reasonable expectation that the cost of developing and making available in the United States a drug for such disease or condition will be recovered from sales in the United States of such drug." An
ArsTechnica explainer suggests that remdesivir received orphan designation under option (B), but
this email from the FDA indicates that it was option (A).
The designation seems correct based on the plain language of the relevant statute and regulations: As of Monday, there were
44,183 cases diagnosed in the United States (and even fewer at the time of Gilead's request), and the
Orphan Drug Act regulations indicate that orphan designation "will not be revoked on the ground that the prevalence of the disease . . . becomes more than 200,000 persons." But given the CDC's low-end
estimates of 2 million Americans eventually requiring hospitalization, commentators have noted that this feels like a loophole that gets around the purpose of the Orphan Drug Act.
What benefits would Gilead have received from an orphan designation?
The main effect would have been a
tax credit for 25% of Gilead's expenses for the clinical trials it is running to figure out whether remdesivir is actually effective for treating COVID-19. (The tax credit was 50% when the Orphan Drug Act became effective in 1983, but was reduced to 25% by the December 2017 tax reform.)