Hikma Pharmaceuticals PLC(Hikma) announced it has launched an authorized generic version of Jazz Pharmaceuticals' Xyrem®1 (sodium oxybate) oral solution CIII.Hikma will have 180 days of marketing exclusivity for its authorized generic product in the US. Sodium Oxybate oral solution, 0.5 g/mL is a prescription medicine used to treat the following symptoms in people 7 years of age or older with narcolepsy: sudden onset of weak or paralyzed muscles (cataplexy), excessive daytime sleepiness (EDS).