Earlier this week, news of a safety issue with Ariad Pharmaceuticals' (NASDAQ:ARIA) leukemia drug Iclusig caused the drugmaker's shares to plunge more than 65%. Today, the stock took another 20% tumble after the FDA announced that it is investigating the safety problems associated with the medication. In the following video, health-care analysts Max Macaluso and David Williamson discuss the details behind both of Ariad's drops this week.

Alison Southwick has no position in any stocks mentioned. David Williamson has no position in any stocks mentioned. Max Macaluso, Ph.D. has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.