Eli Lilly shares have climbed in the double digits this year.Generally, investors turn to pharmaceutical stocks to add an element of safety to their portfolios. These stocks aren't known for rapid growth, but instead, for steady growth that you can count on over time -- this reliability is due to the fact that patients need their medicines, and that supports drugmakers' revenue through any economic environment.But in recent years, one pharma stock in particular has been behaving like a growth stock -- in fa ...