AltheRx Inc., of Chadds Ford, Pa., purchased from GlaxoSmithKline plc, of London, Solabegron, a beta3-adrenoceptor agonist that has demonstrated positive results in Phase II programs for the treatment of overactive bladder in women and irritable bowel syndrome. The company said it plans to advance the overactive bladder program for Solabegron into Phase III this year.