It only takes one drug to produce massive returns, asĀ Seattle Genetics (NASDAQ:SGEN), Medivation (NASDAQ:MDVN), and Regeneron Pharmaceuticals (NASDAQ:REGN) have shown. Click on the slideshow below to learn more about their drugs, and find three more companies that are hoping to become one-drug wonders this year.

The Top Stock Pick for 2014
There's a huge difference between a good stock and a stock that can make you rich. The Motley Fool's chief investment officer has selected his No. 1 stock for 2014, and it's one of those stocks that could make you rich. You can find out which stock it is in the special free report "The Motley Fool's Top Stock for 2014." Just click here to access the report and find out the name of this under-the-radar company.

Brian Orelli has no position in any stocks mentioned. The Motley Fool recommends Seattle Genetics. 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.