In this video, health care analyst David Williamson discusses the recent events around Orexigen Therapeutics, including today's rarely seen price-increasing dilutive offering. Is Orexigen a looming threat to obesity-drug-making heavyweights Arena and VIVUS? Watch and find out. 

David Williamson has no positions in the stocks mentioned above. Follow him on Twitter @MotleyDavid. The Motley Fool has no positions in the stocks mentioned above. 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.