<prompt> Which drug has more analgesic effects than morphine?HeroinApomorphineCodeinePethidine  <response>: Codeine is less potent than morphine as an analgesic60mg codeine10 mg morphine. 100 mg pethidine 10 mg morphine.Heroin is conveed to morphine in the body and has higher lipid solubility than morphine. Ref KD Tripathi 8th ed. 