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Buccal morphine--a new route for analgesia?
Lancet (London, England)
|January 12, 1985
Summary
Buccal morphine provided comparable pain relief to intramuscular morphine after surgery. Buccal administration resulted in greater bioavailability and fewer adverse effects, offering a potentially improved route for pain management.
Area of Science:
- Pharmacology
- Pain Management
- Clinical Trials
Background:
- Postoperative pain is a significant concern following orthopedic surgery.
- Morphine is a common analgesic, but its administration route can impact efficacy and side effects.
Purpose of the Study:
- To compare the analgesic efficacy and safety of buccal versus intramuscular morphine administration.
- To evaluate the pharmacokinetic profile, including bioavailability, of both administration routes.
Main Methods:
- A prospective, double-blind, double-dummy study was conducted.
- Forty patients with postoperative pain were randomized into two groups.
- Each patient received both buccal and intramuscular preparations, with only one containing morphine sulfate (13.3 mg).
Main Results:
- Both buccal and intramuscular morphine demonstrated similar postoperative analgesia.
- Peak plasma morphine concentrations were lower but declined slower with buccal administration.
- Buccal morphine exhibited 40-50% greater bioavailability compared to intramuscular administration.
- Adverse effects were generally less pronounced with buccal morphine.
Conclusions:
- Buccal morphine offers comparable analgesia to intramuscular administration.
- The buccal route enhances morphine bioavailability and potentially reduces side effects.
- Buccal morphine presents a viable alternative for postoperative pain management.