- Anxiety suppression
- Cognitive euphoria
- Compulsive redosing
- Constipation
- Cough suppression
- Difficulty urinating
- Itchiness
- Nausea
- Pain relief
- Physical euphoria
- Pupil constriction
- Respiratory depression
- Sedation
- Stomach cramps
opioid habit-forming depressant
A medium-strength opioid analgesic and analogue of morphine. Considered less potent than morphine but more potent than codeine, and has been used in Germany for this reason. Said to have a 'ceiling' effect where no more euphoria occurs with increased dosage. Under investigation as a maintainance drug in opioid dependence therapy.