Respiratory Depression Associated with Opioids: A Narrative Review

Area of Science:

• Pharmacology
• Toxicology
• Pain Management

Background:

• Opioids are commonly prescribed for pain relief but carry significant risks.
• Respiratory depression and reduced cerebral circulation are known adverse effects of all opioids.
• Fentanyl presents a heightened risk profile for these adverse effects, especially when combined with illicit opioids like heroin.

Purpose of the Study:

• To evaluate the comparative risks of commonly prescribed opioids.
• To emphasize the importance of opioid safety in clinical practice.
• To guide clinicians in selecting safer opioid analgesics amidst an ongoing opioid epidemic.

Main Methods:

• This is an opinion piece based on existing knowledge and clinical consensus.
• It involves a review of the known pharmacological and toxicological profiles of various opioids.
• The analysis focuses on comparative risks of respiratory depression, cerebral circulation effects, and abuse potential.

Main Results:

• Fentanyl exhibits the greatest risk for respiratory depression and reduced cerebral circulation.
• Illicit opioids, such as diamorphine (heroin), exacerbate these risks when combined with fentanyl.
• While effective for analgesia, the relative safety profiles of opioids necessitate careful consideration during prescribing.

Conclusions:

• Fentanyl should not be considered a first-line potent opioid due to its significant risks.
• Buprenorphine, morphine, or hydromorphone are preferred opioid choices, followed by oxycodone.
• Clinicians must prioritize the safe and judicious selection of opioid analgesics in the context of the international opioid crisis.