A method for substantially reducing the range in daily dosages required to control pain in approximately. 90% of patients is disclosed whereby an oral
solid controlled release dosage formulation having from about 10 to about 40 mg of
oxycodone or a salt thereof is administered to a patient. The formulation provides a mean maximum
plasma concentration of
oxycodone from about 6 to about 60 ng / ml from a mean,of about 2 to about 4.5 hours after administration, and a mean minimum
plasma concentration from about 3 to about 30 ng / ml from about 10 to about 14 hours after repeated “q12h” (i.e., every 12 hour): administration through steady-state conditions. Another embodiment is directed to a method for substantially reducing the range in daily dosages required to control pain in substantially all patients by administering an oral
solid controlled release dosage formulation comprising up to about 160 mg of
oxycodone or a salt thereof, such that a mean maximum
plasma concentration of oxycodone up to about 240 ng / ml from a mean of up to about 2 to about 4.5 hours after administration, and a mean minimum
plasma concentration up to about 120 ng / ml from about 10 to about 14 hours after repeated “q12h” (i.e., every 12 hour) administration through steady-state conditions are achieved.
Controlled release oxycodone formulations for achieving the above are also disclosed.