Up 29%,that's kind of a muted reaction to an approval.I guess that's because everybody expected it after the advisory panel recommended to approve it.It also already had a nice two month run.

http://finance.yahoo.com/echarts?s=ARNA+Interactive#symbol=arna;range=3m;compare=;indicator=volume;charttype=area;crosshair=on;ohlcvalues=0;logscale=off;source=undefined;