** Biotechnology company's shares up 3 pct at$13.94
** U.S. FDA approves oral therapy to treat opioid-inducedconstipation, co-developed with AstraZeneca Plc
** The drug will be sold under the trade name Movantik, andbe launched in the first half of 2015, the companies said
** Up to Monday's close, stock had gained about 19 pct thisyear