<prompt> Dysphoria caused by opiates is mediated by which receptor?mukappadeltasigma  <response>: Ans. b. kappa Ref: KDT 7e p478-80, 6e p462Dysphoria caused by opiates is mediated by kappa receptor.Actions ascribed to Opioid Receptorsm mu k kappad delta Physical dependence morphine type Miosis Constipation m2 Analgesia supraspinalm 1 spinal m2 Respiratory depression m2 Euphoria Sedation PM CARES Dysphoria, pscychomimetic Miosis lower ceiling Analgesia Spinal k1 , supraspinal k3 Respiratory depression lower ceiling Diuresis Sedation Physical dependence nalorphine type Reduced Gl motility DMARDS Analgesia Spinal affective component of supraspinal Respiratory depression Affective behavior Reinforcing actions Reduced Gl motility 