Amphastar Pharma (NASDAQ:AMPH) reported quarterly earnings of $0.42 per share which missed the analyst consensus estimate of $0.70 by 40.85 percent. This is a 43.24 percent decrease over earnings of $0.74 per share from the same period last year. The company reported quarterly sales of $171.171 million which missed the analyst consensus estimate of $173.392 million by 1.28 percent. This is a 0.38 percent increase over sales of $170.528 million the same period last year.