Characteristic features of opioid withdrawal is:
Ref: KDT 6/e 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.
Rhinorrhea and lacrimation
Seizures
Delirium tremors
Transient visual, tactile or auditory hallucinations
Central Nervous system