Adult & childn >12 yr 10 mg once daily. Childn 6-12 yr 5 mg bd. Mild renal impairment (CrCl 60 to <90 mL/min) 10 mg once daily, moderate renal impairment (CrCl 30 to <60 mL/min) 5 mg once daily, severe renal impairment & not requiring dialysis (CrCl 15 to <30 mL/min) 5 mg once every 2 days.
Concomitant use w/ alcohol or other CNS depressants. May affect ability to drive & use machines. Renal impairment. Not recommended during pregnancy & lactation. Ped patients <2 yr.