Epocrates Surges In IPO Debut

San Mateo-based Epocrates surged in its IPO debut Wednesday, up to $21.42 after debuting on the NASDAQ as EPOC Wednesday morning at $16.00 per share. The firm sold 5,360,000 shares of its common stock. The IPO was underwritten by J.P. Morgan Securities LLC, Piper Jaffray & Co, William Blair & Company, and JMP Securities. Epocrates is a developer of mobile drug data and other medical data information applications.