Buccal morphine premedication. A double-blind comparison with intramuscular morphine.

Area of Science:

• Anesthesiology
• Pharmacology
• Pain Management

Background:

• Opioid premedication is crucial for managing patient anxiety and pain before anesthesia.
• Buccal morphine presents a potentially convenient and patient-friendly alternative to traditional parenteral opioid administration.
• Previous pilot studies suggested favorable outcomes for buccal morphine, necessitating further investigation.

Purpose of the Study:

• To compare the efficacy, safety, and patient acceptability of buccal morphine tablets versus intramuscular morphine sulfate as pre-anesthetic medication.
• To evaluate the anxiolytic and wakefulness effects of both administration routes using linear analogue scores.
• To explore pharmacokinetic differences influencing clinical outcomes and postoperative analgesia.

Main Methods:

• A double-blind, double-dummy study involving 50 patients undergoing surgery.
• Comparison of buccal morphine 10 mg tablets against intramuscular morphine sulfate 13.5 mg for premedication.
• Assessment of efficacy and safety parameters, including patient-reported outcomes and linear analogue scores for anxiolysis and wakefulness.

Main Results:

• Buccal morphine was found to be a safe and generally acceptable method for opioid premedication.
• Intramuscular morphine sulfate demonstrated superior effectiveness in reducing anxiety and promoting wakefulness compared to buccal morphine.
• Pharmacokinetic data suggest potential benefits for buccal morphine in improving perioperative and immediate postoperative analgesia.

Conclusions:

• While intramuscular morphine remains a more potent premedicant for anxiolysis and wakefulness, buccal morphine offers a viable and safe alternative.
• The route of administration significantly impacts the clinical efficacy of morphine as a premedicant.
• Further research into buccal morphine's pharmacokinetic profile may unlock enhanced postoperative pain management strategies.