<prompt> Features of opoid withdrawl are all exceptDiarrhoeaLacrimationMiosisRhinorrhoea  <response>: C i.e. Miosis - Morphine codeine are natural opium alkaloids. Diacetyl morphine heroin, oxymorphone, hydromorphone, oxycodone, hydrocodone and pholcodeine are semisynthetic opiates. Pethidine meperidine, methadone, dextropropoxyphene, tramadol, fentanyl, alfentanil, sufentanil, remifentanil, levorphanol, dextromoramide, dipipanone are synthetic opioids. Heroin is the most commonly abused addicted opioid. Diagnostic criteria for opioid intoxication include development of clinically significant maladaptive behaviour or psychological change eg initial euphoria fb apathy, dysphoria, psychomotor agitation or retardatin, impaired judgementsocial or occupational functioning and pupillary constriction or pupillary dilation dt anoxia from severe overdose along with 1 of the following signs all developing during, or shol after opioid use: 1 Drowsiness or coma; 2 Slurred speech; 3 Impairment of attention or memory. - Miosis pin point pupil and constipation is caused by opioid use, so on withdrawal of opioid opposite i.e. mydriasis diarrhea occursQ. - YawningQ, dysphoric mood insomniaQ with water loss from different orifices i.e. lacrymation, sweating, diarrhoea, vomiting, rhinorrheaQ, and autonomic symptoms led BP, PR, RR temperature and piloerectionQ are characteristic symptoms of opioid withdrawl. 