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Problems with opiates in cancer pain: parenteral opioids
1Department of Medical Oncology and Palliative Care, Westmead Hospital, NSW, Australia. glarep@hemonc.wh.su.edu.au
Summary
Oral morphine is the preferred method for managing moderate-to-severe chronic cancer pain due to its safety and effectiveness. Non-oral routes are only recommended when oral administration fails or is unavailable.
Area of Science:
- Pain Management
- Pharmacology
- Oncology
Background:
- Morphine is a key analgesic for moderate-to-severe chronic cancer pain.
- Oral administration is generally preferred for morphine due to its favorable characteristics.
Purpose of the Study:
- To review the practicalities and limitations of non-oral morphine administration routes.
- To assess the current understanding of non-oral morphine administration in cancer pain management.
Main Methods:
- Review of existing literature and clinical guidelines on morphine administration.
- Analysis of pharmacokinetic and pharmacodynamic data for various morphine routes.
Main Results:
- Oral morphine is simple, safe, convenient, inexpensive, and effective.
- Non-oral routes are indicated only if oral administration is not feasible or maximal oral doses with coanalgesics have failed.
- New non-oral routes are emerging without sufficient supporting data.
Conclusions:
- Clinicians must understand the limitations of non-oral morphine routes.
- Established practice favors oral morphine unless specific contraindications exist.
- Further research is needed to validate newer non-oral morphine administration methods.