• Peter Schmid-Grendelmeier, Rolf Pokorny, Urs E Gasser, and Ute Richarz.
• University Hospital of Zurich, Zurich, Switzerland.
• Curr Med Res Opin. 2006 Mar 1;22(3):501-9.

ObjectiveEstablishing local tolerability of transdermal opioid systems is important as more systems become available for use in a range of indications. We compared the skin irritation potential of a single application of transdermal fentanyl (Durogesic D-trans; DDTDF) and transdermal buprenorphine (Transtec; TDB) patches in healthy volunteers.Methods46 healthy males and females (mean age [range]: 59.6 [50-69] years) with healthy skin received a single dose of both the DDTDF 25 mug/h patch and the TDB 35 mug/h patch in a randomised order under naltrexone cover. The incidence and severity of erythema was assessed at various timepoints after patch removal.ResultsThere was a non-significant trend towards a higher incidence of erythema 60 min after patch removal with TDB compared with DDTDF. The severity of erythema at 60 min and the incidence of erythema at 72 h after patch removal were significantly higher with TDB than with DDTDF (p = 0.01 and 22% versus 4.9%, p = 0.04, respectively). In general, the results from the chromametric assessment of treated skin were in agreement. The incidence of topical adverse events (AEs) was lower with DDTDF than with TDB (one versus six events) and subjects preferred the DDTDF patch and felt it was less noticeable on the skin. The DDTDF patch was considered less painful to remove, and, consistent with that, the TDB patch was judged to have better adhesion. Twenty-one subjects reported systemic AEs with DDTDF plus naltrexone and 22 with TDB plus naltrexone, most of which were considered treatment-related, 34 and 60 AEs, respectively.ConclusionsLocal tolerability of transdermal opioid systems should be considered when making a therapeutic choice. Even after a single application in healthy volunteers, differences in local tolerability, assessed both clinically and by chromametry, and patch comfort were shown between DDTDF and TDB, in favour of DDTDF.

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