Opioid analgesics side effects / Adverse Reactions of Opioids:
Common side effects and adverse reactions:
- nausea
- vomiting
- drowsiness
- dry mouth
- miosis (contraction of the pupil)
- orthostatic hypotension (blood pressure lowers upon sudden standing)
- urinary retention
- constipation and/or fecal impaction
Less common side effects and adverse reactions:
- confusion
- hallucinations
- delirium
- hives
- itch
- hypothermia
- bradycardia (slow heart rate)
- tachycardia (rapid heart rate)
- raised intracranial pressure
- ureteric or biliary spasm
- muscle rigidity
- flushing
Most severe side effects and adverse reactions:
- respiratory depression
- fatal overdose
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