 Amphastar Pharmaceuticals NASDAQ:AMPH and Neurotrope NASDAQ:NTRP are both small-cap medical companies, but which is the superior stock? We will compare the two businesses based on the strength of their analyst recommendations, earnings, dividends, institutional ownership, valuation, risk and profitability. Risk and Volatility Amphastar Pharmaceuticals has a beta of 1.11, meaning that its stock price is ... 