Earnings season's tearing through the health care sector, and Bristol-Myers Squibb (NYSE:BMY) and GlaxoSmithKline (NYSE:GSK) have faced off with investors this week. Bristol hit all the right points: The company saw its sales climb by 9% for the quarter, and drugs such as skin cancer treatment Yervoy are helping this big pharma staple overcome the residual effects of the patent cliff.

It's a different story for GlaxoSmithKline. The company's corruption probe in China has come back to haunt its finances. Glaxo's China sales dropped by more than 60% for the quarter, and the company's leadership isn't yet sure when the negative impact from China will end.

Where Bristol's stock has soared recently, Glaxo's shares haven't been able to generate much momentum. But where are these two big pharma giants headed in the near future? In the video below, Fool contributor Dan Carroll takes you through Bristol-Myers Squibb's and GlaxoSmithKline's third quarter takeaways and whether either of these stocks is worth your investment heading forward.