Oxyfast (oxycodone) and Roxanol (morphine) are both opioid analgesics.
Opioid analgesics all have similar properties - they decrease the perception of pain, they cause sedation, they cause constipation, they cause cough suppression and they cause respiratory depression. It is the respiratory depression that causes problems in patients suffering from conditions such as asthma, COPD, sleep apnea, or other breathing disorders.
You should let your doctor know if you suffer from shortness of breath.
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