Absorption and Tolerability of Fentanyl Buccal Soluble Film (FBSF) in Patients with Cancer in the Presence of Oral Mucositis

Purpose: Fentanyl buccal soluble film (FBSF) consists of a small, bilayered, water-soluble polymer film that adheres to the buccal mucosa and rapidly delivers fentanyl into the systemic circulation. The purpose of this study was to evaluate the absorption of fentanyl from FBSF in patients with cancer, with and without grade 1 oral mucositis, and to assess the tolerability of FBSF in this patient population.

Patients And Methods: In an open-label, single-dose study, two groups of opioid-naive patients (ie, not receiving opioids on a regular basis) with cancer received a 200 μg dose of FBSF. Patients in cohort I (n = 7) had grade 1 mucositis, and patients in cohort II (n = 7) were age- and gender-matched controls without mucositis. The FBSF dose was placed on the area of mucositis in cohort I and on a matching location in cohort II. Blood samples were collected up to 4 hours after administration, and safety assessments were made throughout the study.

Results: Peak plasma concentration and area under the concentration-time curve from time 0 to 4 hours post-dose values of patients in the grade 1 mucositis cohort were lower than those observed in patients without mucositis. There was no application site irritation reported in any patient, regardless of mucositis status. Mild somnolence was reported by two patients with mucositis. There were no deaths or serious adverse events reported in this study.

Conclusion: The results of this study indicate that application of FBSF to an area of grade 1 mucositis does not result in increased fentanyl exposure or irritation of the mucosa. The 200 μg dose of FBSF was well tolerated.