<prompt> Characteristic features of opioid withdrawal is:Rhinorrhea and lacrimationSeizuresDelirium tremorsTransient visual, tactile or auditory hallucinations  <response>: Ref: KDT 6e p447 Withdrawal symptoms are opposite of the acute effect of drug. For opioids, these include lacrimation, rhinorrhea, lacrimation, yawning, piloerection, diarrhea, nausea, coughing, mydriasis, sweating and twitching of muscles. 