On Monday, Johnson & Johnson (NYSE: JNJ) received approval in Europe for Zytiga as a pre-chemo treatment for prostate cancer. With Dendreon's (NASDAQ: DNDN) drug Provenge not approved in Europe yet, should investors be concerned about its ability to gain traction on the continent? Watch the following video and find out.

David Williamson owns shares of Johnson & Johnson. The Motley Fool owns shares of Dendreon and Johnson & Johnson. Motley Fool newsletter services recommend Johnson & Johnson. Try any of our Foolish newsletter services free for 30 days. We Fools don't 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.