<prompt> Opioids differ from opiates in that they are:More powerful in actionMore long actingSynthetic derivativesDerived directly from opium  <response>: Opiods are synthetics while opiates are semi synthetic. Opiods include pethidine,fentanyl,methadone,dextropropoxyphene,tramadol. Semisynthetic opiates include heroin ,pholcodine,ethylmorphine . Ref: KD Tripathi 8th ed. 