CONCLUSIONS	When given as venous retention pretreatments 1 min before propofol , paracetamol 1 mg kg ( -1 ) and lidocaine 0.5 mg kg ( -1 ) were equally effective in attenuating pain during intravenous ( i.v. ) injection of propofol whereas pretreatment with paracetamol 2 mg kg ( -1 ) was shown to be the most effective treatment .\