TY - JOUR
T1 - A randomized, double-blind, vehicle-controlled crossover study to determine the anti-pruritic efficacy, safety and local dermal tolerability of a topical formulation (SRD174 cream) of the long-acting opiod antagonist nalmefene in subjects with atopic dermatitis
AU - Herzog, Jo Lynne
AU - Solomon, James A.
AU - Draelos, Zoe
AU - Fleischer, Alan
AU - Stough, Dow
AU - Wolf, David I.
AU - Abramovits, William
AU - Werschler, William
AU - Green, Emma
AU - Duffy, Maeve
AU - Rothaul, Alan
AU - Tansley, Robert
PY - 2011/8
Y1 - 2011/8
N2 - Objective: To investigate the efficacy, safety and tolerability of topical nalmefene (SRD174), a long acting opioid antagonist for the management of pruritus associated with atopic dermatitis (AD). Design: Double-blind, vehicle-controlled, randomized, cross-over trial. Setting: Eleven dermatology outpatient clinics in the U.S. Patients: Sixty-two out of 136 screened adult subjects with confirmed AD affecting ≤20% of body surface area and with moderate-to-severe pruritus. Interventions: SRD174 cream or matching vehicle cream applied as required during two 7-day periods separated by a wash-out period. Main Outcome Measure(s): The primary efficacy variable was the period mean of the sum of pruritus intensity difference (SPID) from 0 to 4 hours (SPID 0-4) where pruritus was measured on a 0-100 scale Visual Analog Scale (VAS) at seven pre-specified time-points following study drug application. A range of secondary efficacy, safety and tolerance endpoints were included. Results: The LS means for the SPID 0-4 (±SD) for SRD174 cream and Vehicle were 210.7 (20.4) and 212.1 (20.2), respectively (Difference = -1.3 (95% CI: -25.9, 23.3). None of the secondary efficacy endpoints tested demonstrated a statistically significant or clinically important difference between the test product and the vehicle. Overall, the SRD174 cream was well tolerated although there was a higher incidence of AEs when subjects took SRD174 cream (22, 36.7 percent of subjects) compared with when they were taking vehicle (14, 23.3 percent of subjects). Conclusions: SRD174 cream did not demonstrate efficacy in the treatment of pruritus associated with atopic dermatitis raising questions on the role of peripheral opioid receptors as a target for the treatment of pruritus in this population. NCT00838708.
AB - Objective: To investigate the efficacy, safety and tolerability of topical nalmefene (SRD174), a long acting opioid antagonist for the management of pruritus associated with atopic dermatitis (AD). Design: Double-blind, vehicle-controlled, randomized, cross-over trial. Setting: Eleven dermatology outpatient clinics in the U.S. Patients: Sixty-two out of 136 screened adult subjects with confirmed AD affecting ≤20% of body surface area and with moderate-to-severe pruritus. Interventions: SRD174 cream or matching vehicle cream applied as required during two 7-day periods separated by a wash-out period. Main Outcome Measure(s): The primary efficacy variable was the period mean of the sum of pruritus intensity difference (SPID) from 0 to 4 hours (SPID 0-4) where pruritus was measured on a 0-100 scale Visual Analog Scale (VAS) at seven pre-specified time-points following study drug application. A range of secondary efficacy, safety and tolerance endpoints were included. Results: The LS means for the SPID 0-4 (±SD) for SRD174 cream and Vehicle were 210.7 (20.4) and 212.1 (20.2), respectively (Difference = -1.3 (95% CI: -25.9, 23.3). None of the secondary efficacy endpoints tested demonstrated a statistically significant or clinically important difference between the test product and the vehicle. Overall, the SRD174 cream was well tolerated although there was a higher incidence of AEs when subjects took SRD174 cream (22, 36.7 percent of subjects) compared with when they were taking vehicle (14, 23.3 percent of subjects). Conclusions: SRD174 cream did not demonstrate efficacy in the treatment of pruritus associated with atopic dermatitis raising questions on the role of peripheral opioid receptors as a target for the treatment of pruritus in this population. NCT00838708.
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M3 - Article
C2 - 21818506
AN - SCOPUS:80053073997
SN - 1545-9616
VL - 10
SP - 853
EP - 860
JO - Journal of Drugs in Dermatology
JF - Journal of Drugs in Dermatology
IS - 8
ER -