Epoprostenol sodium with arginine-mannitol excipients ( epoprostenol AM ; Veletri -LSB- Actelion Pharmaceuticals Ltd , Allschwil , Switzerland -RSB- ) and epoprostenol sodium with glycine-mannitol excipients ( epoprostenol GM ; Flolan -LSB- GlaxoSmithKline , Triangle Park , NC -RSB- ) are intravenous treatments for pulmonary arterial hypertension ( PAH ) .