The goal of this clinical trial is to assess the safety and pharmacokinetics of YASO GEL in healthy adult participants. This is a first-in-human study designed to understand how the gel is absorbed and distributed in plasma and vaginal fluid, and to evaluate the methods used to measure drug levels in humans. The main questions the study aims to answer are: What is the preliminary safety and tolerability of YASO GEL at a subtherapeutic 0.7% dose? How is YASO GEL absorbed and distributed, and does sexual activity affect its pharmacokinetics? Participants will: Receive an application of YASO GEL. Provide blood and vaginal fluid samples for pharmacokinetic analysis. Participate in a sub-study evaluating the impact of sexual activity on safety and drug exposure. Additional information on product acceptability, adherence, and exploratory laboratory analyses will be collected to inform the design of future studies.
Age range
18 Years – 55 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
Incidence of treatment-emergent adverse events
Timeframe: Incidence of treatment-emergent adverse events, measured from first dose through Day 3 post-dose (Lead-in), 21 days post-dose (Phase 1, Stage 1), 28 days post first dose (Phase 1, stage 2) and 24 hours post dose (coital sub-study).
Plasma and vaginal fluid concentrations of investigational contraceptive
Timeframe: Time from first dose to last PK sample collection per study section: lead-in up to Day 3; Phase 1 Stage 1 up to Day 21; Phase 1 Stage 2 up to Day 28; sub-study up to 24 hours post dose; samples collected at multiple predefined timepoints.