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Tamoxifen Versus Estradiol for Unscheduled Bleeding in Etonogestrel Implant Users, a Randomized Pilot Trial

Tamoxifen Versus Estradiol in the Prevention of Unscheduled Bleeding in Etonogestrel Implant Users, a Randomized Controlled Pilot Trial

Status
Withdrawn
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04933240
Enrollment
0
Registered
2021-06-21
Start date
2022-05-31
Completion date
2024-12-31
Last updated
2022-06-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Vaginal Bleeding

Brief summary

The purpose of this research study is to evaluate the ability of medicines called tamoxifen or estradiol to prevent annoying vaginal bleeding for arm implant users.

Detailed description

This pilot study compares the use of tamoxifen to estradiol to placebo for seven days once a month up to 5 months in contraceptive implant users starting from the time of implant initiation. Participants will record bleeding and satisfaction response in a daily text diary.

Interventions

DRUGTamoxifen Citrate 10Mg Tab

nonsteroidal antiestrogen for oral administration in 10 mg tablets. Each tablet contains 15.2 mg of tamoxifen citrate which is equivalent to 10 mg of tamoxifen.

DRUGEstradiol

estradiol tablets for oral administration contains 1 mg of micronized estradiol per tablet.

DRUGPlacebo

A sugar tablet that does not contain any active medicine

Sponsors

Virginia Commonwealth University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
FEMALE
Age
15 Years to 45 Years
Healthy volunteers
Yes

Inclusion criteria

* etonogestrel implant users * at time of and/or within 21 days of initial use of etonogestrel implant placement * must agree not to take additional hormonal therapy during the study trial period

Exclusion criteria

* within 6 months following vaginal or cesarean delivery * within 6 weeks following abortion * currently breastfeeding * positive pregnancy test * contraindications to tamoxifen or estrogen * history of thromboembolism * undiagnosed abnormal uterine bleeding * active cervicitis * bleeding disorder * use of anticoagulation medications * an unwillingness or inability to keep a daily menstrual diary or to follow the study criteria

Design outcomes

Primary

MeasureTime frameDescription
Duration of bleeding free daysUp to 28 daysNumber of days of no spotting or bleeding after initiation of first treatment until day of subsequent bleeding

Secondary

MeasureTime frameDescription
Total number of bleeding free daysUp to 24 weeksTotal number of no spotting or bleeding days
Days to first re-treatmentUp to 24 weeksNumber of days between first and second use of medication
Total number of re-treatmentsUp to 24 weeksTotal number of times participant used treatment medication
Satisfaction with bleedingUp to 24 weeksAverage satisfaction with bleeding will be assess using daily text surveys. Participants will rate degree of satisfaction with bleeding with the use of symbols (emojis): 1) completely unsatisfied, 2) somewhat unsatisfied, 3) neutral, 4) somewhat satisfied, 5) completely satisfied.
Affects on daily life activitiesUp to 24 weeksThe average affect of bleeding on daily life activities will be assess using daily text surveys. Participants will rate the degree of affects of bleeding on daily life with the use of a visual analogue scale from 0 (no affects) to 100 (highest possible affects)

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026