 Hikma Pharmaceuticals PLC LSE:HIK, OTC:HKMPF said it has launched an authorised generic version of Jazz Pharmaceuticals Xyrem sodium oxybate oral solution CIII. Sodium Oxybate oral solution, 0.5 gmL is a prescription medicine used to treat people with narcolepsy for symptoms of sudden onset of weak or paralyzed muscles cataplexy and excessive daytime sleepiness EDS, the multinational pharmaceutical company said in a statement. 