All big pharmas have unresolved issues, SNY's problem here is no show stopper. Rather it's most likely no big problem at all. Owning big pharma companies has risks and that's why it's best to hold a number of them and not to panic at the first shout of "the sky is falling"
It's somewhat akin to holding oil companies, one has to hope their wells come in and don't prematurely run dry.
Lets see if the news contains anything about doing more research about the 'non conclusive' claims. I believe you will hear somewhere in this release that 'even though Lantus is deemed safe in all of our research' we're going to do a little more and 'cooperate' with the agencies.