Use of nasal fentanyl for cancer pain: A pharmacoepidemiological study.

BACKGROUND

Breakthrough pain affects 40%-90% of patients with cancer pain. Nasal fentanyl is one of the recommended treatments, particularly if the breakthrough pain is of rapid onset.

AIM

To investigate the prevalence of use of nasal fentanyl, to study which strong opioids have been used prior to nasal fentanyl and to examine which opioids are used concomitantly with nasal fentanyl.

DESIGN

Longitudinal cohort study based on death cohorts defined according to year of death.

SETTING/PARTICIPANTS: The study is based on data from the complete national Norwegian Prescription Database. The study population included all persons in Norway who died in the years 2010, 2011 and 2012 and who had received nasal fentanyl with reimbursement for palliative treatment.

RESULTS

Of those who died from cancer in 2010, 2011 and 2012, 611 persons (2%) received dispensed prescriptions of nasal fentanyl. Two-thirds had received other short-acting strong opioids before nasal fentanyl. One quarter did not receive a long-acting opioid concomitantly with nasal fentanyl, but 68% of these received only one dispensed prescription of nasal fentanyl. Of those who received a long-acting opioid together with nasal fentanyl, transdermal fentanyl was the most common drug (65%). One-third received another short-acting opioid concomitantly with nasal fentanyl.

CONCLUSION

The use of nasal fentanyl was surprisingly low. There is a need for clinical research addressing the use of nasal fentanyl without a long-acting opioid for background pain and the use of nasal fentanyl together with another short-acting opioid.