Pharma juggernaut Merck (NYSE:MRK) may seem like one of the safest plays in the health care space; after all, it's a Dow component and has been in existence for decades. That does not mean, however, that this is an entirely risk-free investment. In this video, health care analyst Max Macaluso runs down three risks that every Merck shareholder needs to consider.

Max Macaluso, Ph.D. has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. 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.