Extended release composition containing tramadol

摘要

An oral tramadol pharmaceutical composition for once daily administration, containing an effective amount of tramadol or a pharmaceutically-acceptable salt thereof, providing in vivo, a time of tramadol peak plasma concentration (Tmax) greater than 10 hours and a peak tramadol plasma concentration (Cmax) which is less than three times a plasma concentration obtained 24 hours after administration (C24h) of a single dose of the composition.