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Completed

NCT Number: NCT06867835

Single Dose of Vyleesi in Lactating Female Subjects to Measure the Concentration of Bremelanotide in Breast Milk

The primary objectives of this clinical trial performed with Vyleesi (Bremelanotide Injection) are:

* to evaluate if Bremelanotide (BMT) is secreted in breast milk of lactating women treated with a single dose of BMT 1.75 mg SC. * to measure the concentration and characterize the pharmacokinetics of BMT secreted in breast milk of lactating women treated with a single dose of BMT 1.75 mg SC.

This open-label, pharmacokinetic (PK) study will be performed in 10 healthy lactating female subjects between 10 days and 6 months post-partum (inclusive). The maximum duration of subject participation in the study will be approximately 29 days, consisting of 3-week Screening period, a 1 day treatment period, and up to a 7 day follow-up period.

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Key information

Conditions

Age range

18 year–55 year

Sex eligibility

Female

Study type

Interventional

Phase

Phase 4

Primary location

First Excellence Research Group LLC

Doral, Florida, 33178, United States

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

(Main Criteria):

  • Female subjects ≥18 to 55 years of age (inclusive) and premenopausal
  • Lactating, between 10 days and 6 months postpartum (inclusive).
  • Exclusively breastfeeds their infant prior to participation in the study
  • Is willing to pump and store breastmilk for feeding her infant for a minimum of 48 hours in advance of study initiation and discontinue breastfeeding their infant for the duration of their study participation (beginning from time of dosing with BMT) and a minimum of 24 hours following the Safety Follow-Up visit (i.e., a minimum of 48 hours following dosing with BMT).
  • Ensure at the time of screening that the breastfed infant can feed from a bottle during maternal participation in the study
  • The subject is not pregnant, and does not intend to become pregnant before, during, or within 1 complete menstrual cycle or 2 months after administration of study drug
  • Subjects of childbearing potential who are sexually active with a nonsterilized male partner must have stable, continuous use of an acceptable method of contraception throughout the duration of the study, and for at least 60 days after the dose of study drug

Exclusion criteria

(Main Criteria):

  • Breastfeeding is not well established in the mother-infant pair (e.g., poor latching of the infant or low milk supply).
  • Any condition that interferes with the successful collection of milk from one or both breasts including but not limited to lactation mastitis (typically presents as a tender, hot, swollen area of the breast that may or may not involve an infection), milk blister that may present as a blocked nipple pore, breast abscess, etc.
  • Has used any investigational compound and/or an experimental medical device within 28 days before Screening.
  • Has taken BMT within 24 hours of participation in the study

Treatment and study plan

Vyleesi (Bremelanotide Injection)

Drug

Single dose of BMT 1.75 mg SC on Day 1

Primary outcomes

  1. Levels of Bremelanotide (BMT) in Breast Milk Over 24h After Administration of Vyleesi

    Time frame: 24 hours

    The levels/concentrations of bremelanotide (BMT) will be measured in breast milk samples collected at different timepoints up to 24h from lactating women who receive a single dose of Vyleesi (BMT 1.75 mg SC).

  2. Area under the curve from time 0 to end of dosing interval (AUCtau) for BMT in Breast Milk

    Time frame: 24 hours

  3. Maximum observed concentration (Cmax) of BMT in breast milk

    Time frame: 24 hours

  4. Time to reach Cmax of BMT in breast milk (Tmax)

    Time frame: 24 hours

  5. Terminal half-life of BMT in breast milk (t1/2)

    Time frame: 24 hours

Secondary outcomes

  1. Levels of Bremelanotide (BMT) in Plasma Over 24h After Administration of Vyleesi

    Time frame: 24 hours

  2. Area under the curve from time 0 to end of dosing interval (AUCtau) for BMT in Plasma

    Time frame: 24 hours

  3. Maximum observed concentration (Cmax) of BMT in Plasma

    Time frame: 24 hours

  4. Time to reach Cmax of BMT in Plasma (Tmax)

    Time frame: 24 hours

  5. Milk:plasma ratio (M/P) of BMT Levels

    Time frame: 24 hours

Sponsors and collaborators

Lead sponsor

Cosette Pharmaceuticals, Inc.

Industry

Registry information

Official study title

A Phase 4, Open-Label Study of a Single Dose of Vyleesi® (Bremelanotide Injection) in Healthy, Premenopausal Lactating Female Subjects to Measure the Concentration of Bremelanotide in Breast Milk

Important dates

Study start
2025
Primary completion
2025
Study completion
2025
First posted
Mar 10, 2025
Registry last updated
Jan 13, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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