Objectives: To determine the efficacy and safety of different opioids used in doses proportional to the basal opioid regimen for the management of breakthrough pain (BP).
Methods: In 66 patients consecutive patients admitted to a pain relief and palliative care unit, the efficacy and safety of different opioids used in doses proportional to the basal opioid regimen for the management of breakthrough pain (BP) were assessed. The choice of the opioid to be administered as rescue medication was based on the characteristics of patients, clinical stability, compliance, preference, and so on. For each episode, nurses were instructed to routinely collect changes in pain intensity and emerging problems when pain became severe (T0), and to re-assess the patient 15 minutes after the opioid given as a rescue medication (T15).
Results: Six hundred twenty four episodes of BP were recorded during admission. Intravenous morphine (IV-MO) and oral transmucosal fentanyl (OTFC) were most frequently administered. Of 503 events available, 427 episodes were defined as successfully treated, while 76 episodes required a further administration of opioids. Pain intensity significantly decreased at T15 in all the groups (P<0.001). In 97.2% and 90.7% of cases treated with IV-MO, BP events had a reduction in pain intensity of more than 33% and 50%, respectively. In 99.2% and 97.6% patients receiving OTFC, BP events had a reduction in pain intensity of more than 33% and 50%, respectively.
Discussion: This survey suggests that doses of opioids for BP proportional to the basal opioid regimen, are very effective and safe in clinical practice, regardless the opioid and modality used.