The pharmaceutical stock can still deliver.Eli Lilly's (LLY +1.58%) share price has soared over the past five years (up 530%). In fact, it's hard to find a single pharmaceutical giant that has performed better over this period. However, some might think that the company's stock is no longer worth buying at current levels. After all, Eli Lilly stock is trading at 27 times forward earnings. That's meaningfully higher than the 18.3 average for the healthcare sector.But Eli Lilly's shares do remain attractive. ...