Comparing intact tablets , the drug liking Emax ( least squares means -LSB- @ % confidence interval -RSB- ) was significantly lower for OC/APAP @/@ mg ( @ -LSB- @ to @ -RSB- ) than for IR OC/APAP @/@ mg ( @ -LSB- @ to @ -RSB- ; difference , -@ -LSB- -@ to -@ -RSB- ; P < @ ) .