Signs and symptoms include dysphoria, insomnia, pupillary dilation, piloerection, yawning, muscle aches, lacrimation, rhinorrhea, nausea, fever, sweating, vomiting and diarrhoea
[ndarc.med.unsw.edu.au]
[…] opiate dependant can experience physical withdrawal symptoms when trying to stop; these can include symptoms such as: agitation anxiety muscle aches runny nose sweating yawning
[gov.je]
Slowed reflexes Pupil dilation Nausea Vomiting Diarrhea Sores, wounds, bruising, or puncture marks from needle use Weight loss Poor coordination or motor skills Excessive yawning
[twelveoaksrecovery.com]