Conditions: Contraception
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 3389
Healthy volunteers: yes

Brief summary:
This is a research study of a new experimental vaginal gel that helps in vaginal pH regulation and results in immobilization of spermatozoa by maintaining the normally low vaginal pH, even in the presence of semen. This vaginal gel is called Phexxi™ (previously known as Amphora) and was compared to a commercially available spermicide called Conceptrol®, which contains nonoxynol 9; commonly abbreviated as N-9. Conceptrol® can help prevent pregnancy. This study objective was to determine if this product prevents pregnancy when inserted into the vagina before intercourse.

Detailed description:
Clinical Trial Design

This is a multicenter, open-label, randomized, controlled, Phase III study of repeated use of Amphora™ gel compared to Conceptrol® Vaginal Gel as the method of contraception over seven cycles of use. In addition, there is an opportunity for Amphora™ gel subjects to continue with study treatment for up to 13 cycles of treatment upon completion of the first seven cycles of treatment.

A subset of subjects (Amphora™ gel and Conceptrol® Vaginal Gel) will undergo colposcopy at the Admission Visit and at the visits after Cycles 1, 3, and 7 (Treatment Exit). Subjects participating for 13 cycles will also undergo colposcopy after Cycles 10 and 13. Colposcopic photographs will be taken at all visits independent of presence of any suspicious areas. Any suspicious areas and clinical findings will be recorded on the colposcopy case report form. The colposcopy evaluator for the subset will be blinded regarding the treatment group of the subject. If at any time during the study the investigator deems colposcopy necessary, colposcopy will be performed on any subject and will not be limited to subjects in the colposcopy subset.

A subset of subjects (Amphora™ gel and Conceptrol® Vaginal Gel) will also have semi-quantitative cultures for E. coli and clinical yeast performed at the Admission Visit and after Cycles 1, 3, and 7 (Treatment Exit) Visits. Subjects participating for 13 cycles will also undergo the assessments after Cycles 10 and 13. Another subgroup will have quantitative vaginal cultures performed after Cycles 1 and 7 (Treatment Exit) Visits, and also after Cycle 13 for subjects participating in the extension.

Selected research centers will also recruit subjects into the subset of women 36-45 years of age at enrollment.

Arms:
arm 1: 100 mg (4% concentration) of nonoxynol-9 in 2.5 mL volume of gel arm 2: Citric acid USP, potassium bitartrate USP, and L-lactic acid USP

Interventions: intervention 1: Conceptrol intervention 2: Amphora
Intervention descriptions: intervention 1: • Conceptrol® Vaginal Gel, which contains 100 mg (4% concentration) of nonoxynol-9 (N-9) in 2.5 mL volume of gel. intervention 2: • Amphora™ gel, which will be delivered in 5 mL doses, is a clear, water-based, petroleum-free gel.

Protocol document: