ally ▁as ▁either ▁sod ium ▁solution ▁or ▁table t , ▁however ▁can ▁also ▁be ▁given ▁by ▁int ra ven ous ▁injection . ▁ ▁Table ts ▁contain ▁either ▁ 3 0   m g ▁or ▁ 5 0   m g ▁of ▁but ab ar b ital ▁sod ium , ▁or ▁ 3 0   m g / 5 m L ▁with ▁ 7 % ▁alco hol / vol ▁in ▁solution . ▁ ▁For ▁pre oper ative ▁sed ation , ▁adult s ▁are ▁admin ister ed ▁ 5 0 – 1 0 0   m g ▁ 6 0 - 9 0 min ▁prior ▁to ▁surg ery , ▁with ▁varying ▁dos es ▁for ▁ped iat ric ▁and ▁ger iat ric ▁patients . ▁ ▁C lin ical ▁Effect s ▁& ▁El im ination ▁▁ ▁Effect s ▁from ▁or al ▁dos es ▁often ▁are ▁felt ▁within ▁an ▁hour ▁of ▁administration , ▁last ing ▁somewhere ▁from ▁six ▁to ▁eight ▁hours ▁in ▁effect . ▁ ▁A ▁non - select ive ▁de press ant ▁of ▁the ▁C NS , ▁But ab ar b ital ▁sod ium ▁is ▁used ▁as ▁a ▁sed ative ▁hyp not ic , ▁depending ▁on ▁do se , ▁to ▁indu ce ▁d rows iness ▁or ▁sleep , ▁or ▁reduce ▁anx iety ▁and ▁t ension . ▁But ab ar b ital ▁sod ium ▁can ▁be ▁used ▁as ▁a ▁pre - s urg ical ▁an est h etic ▁aid ▁or ▁in ▁the ▁short - term ▁treatment ▁of ▁sleep ▁and ▁anx iety ▁dis orders . ▁ ▁For ▁short ▁term