LIBERTY 2: Efficacy & Safety Study of Relugolix in Women With Heavy Menstrual Bleeding Associated With Uterine Fibroids

Summary

The purpose of this study is to determine the benefit of relugolix 40 milligrams (mg) once a day co-administered with estradiol (E2) 1 mg and norethindrone acetate (NETA) 0.5 mg compared with placebo for 24 weeks on heavy menstrual bleeding associated with uterine fibroids.

Timeline

Start

2017-06-14

Primary completion

2019-07-10

Completion

2020-09-16

Outcome

Met primary endpoint

registry Relugolix Plus E2/NETA (Group A) vs Placebo (Group C); p <0.0001; Treatment Difference 56.47 (95% CI 46.45 to 66.49) NCT03103087 ↗

release “LIBERTY 1 and LIBERTY 2 each met the primary endpoint, with 73.4% and 71.2% of women in the relugolix combination therapy groups achieving the responder criteria” pfizer.com ↗

release “LIBERTY 1 and 2 met their primary endpoints (p < 0.0001)” pfizer.com ↗

Publications

• Catherino WH, Al-Hendy A, Zaim S, Bouzegaou N, Venturella R, Stewart EA, Wu R, Vannuccini S, Perry JS, Rakov VG, Munro MG. Efficacy and safety of relugolix combination therapy in women with uterine fibroids and adenomyosis: subgroup analysis of LIBERTY 1 and LIBERTY 2. Fertil Steril. 2025 Sep;124(3):523-533. doi: 10.1016/j.fertnstert.2025.04.037. Epub 2025 May 2.
• Stewart EA, Lukes AS, Venturella R, Ferreira JA, Li Y, Hunsche E, Wagman RB, Al-Hendy A. A plain language summary describing changes in pain associated with uterine fibroids among women receiving relugolix combination therapy. Pain Manag. 2024 Sep;14(9):469-476. doi: 10.1080/17581869.2024.2408114. Epub 2024 Oct 28.
• Stewart EA, Al-Hendy A, Lukes AS, Madueke-Laveaux OS, Zhu E, Proehl S, Schulmann T, Marsh EE. Relugolix combination therapy in Black/African American women with symptomatic uterine fibroids: LIBERTY Long-Term Extension study. Am J Obstet Gynecol. 2024 Feb;230(2):237.e1-237.e11. doi: 10.1016/j.ajog.2023.10.030. Epub 2023 Oct 18.
• Al-Hendy A, Lukes AS, Venturella R, Villarroel C, McKain L, Li Y, Wagman RB, Stewart EA. A plain language summary of the long-term relugolix combination therapy study for uterine fibroids. J Comp Eff Res. 2023 Aug;12(8):e230069. doi: 10.57264/cer-2023-0069. Epub 2023 Jul 21.
• Al-Hendy A, Lukes AS, Poindexter AN 3rd, Venturella R, Villarroel C, Critchley HO, Li Y, McKain L, Arjona Ferreira JC, Langenberg AG, Wagman RB, Stewart EA. A plain language summary of the safety of relugolix combination therapy and improvement in symptoms in women with uterine fibroids from the LIBERTY 1 and LIBERTY 2 studies. Pain Manag. 2023 Apr;13(4):205-211. doi: 10.2217/pmt-2022-0085. Epub 2023 May 15.
• Al-Hendy A, Lukes AS, Poindexter AN 3rd, Venturella R, Villarroel C, McKain L, Li Y, Wagman RB, Stewart EA. Long-term Relugolix Combination Therapy for Symptomatic Uterine Leiomyomas. Obstet Gynecol. 2022 Dec 1;140(6):920-930. doi: 10.1097/AOG.0000000000004988. Epub 2022 Nov 2.
• Stewart EA, Lukes AS, Venturella R, Arjona Ferreira JC, Li Y, Hunsche E, Wagman RB, Al-Hendy A. Relugolix Combination Therapy for Uterine Leiomyoma-Associated Pain in the LIBERTY Randomized Trials. Obstet Gynecol. 2022 Jun 1;139(6):1070-1081. doi: 10.1097/AOG.0000000000004787. Epub 2022 May 2.
• Hunsche E, Rakov V, Scippa K, Witherspoon B, McKain L. The Burden of Uterine Fibroids from the Perspective of US Women Participating in Open-Ended Interviews. Womens Health Rep (New Rochelle). 2022 Mar 4;3(1):286-296. doi: 10.1089/whr.2021.0086. eCollection 2022.
• Al-Hendy A, Lukes AS, Poindexter AN 3rd, Venturella R, Villarroel C, Critchley HOD, Li Y, McKain L, Arjona Ferreira JC, Langenberg AGM, Wagman RB, Stewart EA. Treatment of Uterine Fibroid Symptoms with Relugolix Combination Therapy. N Engl J Med. 2021 Feb 18;384(7):630-642. doi: 10.1056/NEJMoa2008283.

Drugs

Evaluation	Drug	Modality	Dose	Route
Subject	Estradiol/norethindrone acetate	Unknown	0.5 mg	Oral
Subject	Estradiol/norethindrone acetate	Unknown	1 mg	Oral
Subject	Relugolix	Small molecule	40 mg	Oral

Indications