Investors looking for stocks that can make swift and dramatic gains need to take a look at these biopharmaceutical stocks. The average Wall Street analyst following them thinks they could climb by 70% and 72%, respectively, over the next 12 months.

When it comes to price targets, it's important to remember that the analysts who set them can simply readjust those targets downward if things don't work out as hoped. Before risking any of your own money on these stocks, let's take a quick look at what could drive them higher.

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Source Fool.com