EXTON, Pa. (AP) -- ViroPharma Inc. said Wednesday that its board of directors approved a program to buy back up to $150 million in stock and 2 percent senior convertible notes due 2017.
The company had about 78.1 million shares of common stock outstanding as of Dec. 31.
Shares of ViroPharma rose 99 cents, or 5.5 percent, to $18.97 in afternoon trading after trading at a 52-week high of $19.47 earlier in the session.