Reduced pelvic pain in women with endometriosis: efficacy of long-term dienogest treatment

Felice Petraglia, Daniela Hornung, Christian Seitz, Thomas Faustmann, Christoph Gerlinger, Stefano Luisi, Lucia Lazzeri, Thomas Strowitzki, Felice Petraglia, Daniela Hornung, Christian Seitz, Thomas Faustmann, Christoph Gerlinger, Stefano Luisi, Lucia Lazzeri, Thomas Strowitzki

Abstract

Purpose: To investigate the efficacy and safety of dienogest as a long-term treatment in endometriosis, with follow-up after treatment discontinuation. The study included women with endometriosis, who had previously completed a 12-week, placebo-controlled study of dienogest, who participated in an open-label extension study for up to 53 weeks. Thereafter, a patient subgroup was evaluated in a 24-week follow-up after treatment discontinuation.

Methods: A multicenter study performed in Germany, Italy and Ukraine. Women with endometriosis were enrolled at completion of the placebo-controlled study (n = 168). All women received dienogest (2 mg once daily, orally) and changes in pelvic pain (on a visual analog scale), bleeding pattern, adverse events and laboratory parameters were evaluated during and after treatment.

Results: The completion rate among women who entered the open-label extension study was 90.5% (n = 152). A significant decrease in pelvic pain was shown during continued dienogest treatment (P < 0.001). The mean frequency and intensity of bleeding progressively decreased. Adverse events, rated generally mild or moderate, led to withdrawal in four patients (2.4%). No clinically relevant changes in laboratory parameters were observed. During treatment-free follow-up (n = 34), the reduction in pelvic pain persisted, while bleeding frequency and intensity returned to normal patterns.

Conclusions: Long-term dienogest showed a favorable efficacy and safety profile, with progressive decreases in pain and bleeding irregularities during continued treatment; the decrease of pelvic pain persisted for at least 24 weeks after treatment cessation.

Figures

Fig. 1
Fig. 1
Patient disposition during the extension study and the treatment-free follow-up period
Fig. 2
Fig. 2
Mean (±SEM) VAS scores for EAPP during the extension study (FAS) in the total, prior-dienogest and prior-placebo groups. Mean VAS score was statistically significantly reduced by 43.2 (±21.7) mm over the total treatment period of 65 weeks (i.e., placebo-controlled plus extension study; P < 0.001). EAPP endometriosis-associated pain, FAS full analysis set, SEM standard error of the mean, VAS visual analog scale
Fig. 3
Fig. 3
Frequencies of maximal intensity of bleeding in 90-day reference periods 1 and 4 during dienogest treatment in the extension study (FAS) FAS full analysis set

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Source: PubMed

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