Profits from Teva's (TEVA 1.85%) flagship drug, Copaxone, may be in jeopardy. The company just lost a major court case, invalidating a key patent, that will allow generic versions of the multiple sclerosis drug to market by May 2014, a full 16 months early. In this video, Motley Fool health-care analyst David Williamson discusses just how much this compressed timeline is going to hurt Teva and what he'll be looking for with the company going forward.