After two months of public, hostile back-and-forth, Sanofi agreed to confidentially discuss a potential acquisition of Medivation, putting the French pharma on equal footing with the biotech company's other suitors.

With new funding in hand, Moderna and its infectious disease venture Valera are going full-speed ahead with a Zika vaccine, taking an mRNA approach, which they said could be a more rapid strategy to try to stop the disease.

Allergan CEO Brent Saunders vows not to engage in price gouging and says his firm will limit cost increases to single-digit percentages, occurring only once per year. But it's unclear whether Saunders will stand as a lone wolf in the industry or if others will make similar pledges.