Weight-Loss injections may alter contraception effectiveness
NCT ID NCT07013643
First seen Jun 27, 2026 · Last updated Sep 18, 2026 · Updated 6 times
Summary
This early-stage study in 50 healthy women with overweight or obesity examines whether two experimental weight-loss injections, AZD6234 and AZD9550, change how the body processes a common birth control pill. Participants will receive the drugs alone and together, and researchers will measure hormone levels in the blood. The goal is to ensure women using these future treatments can still rely on oral contraception.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- AZD6234 and AZD9550 (injectable drugs for weight loss)
- What this could lead to
- If successful, this study will show whether these weight-loss drugs change how birth control pills work, helping women choose effective contraception.
- What could go wrong
- This is an early Phase 1 trial with only 50 healthy participants, so results may not apply to everyone. The study focuses on drug interactions, not on treating a disease.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 1
The first testing in people. Mainly checks safety and dose, usually in a small group.
- Participants
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About 50 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jun 2025
- Expected to finish
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Jul 2027
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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35 to 75 years
- Sex
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Female participants only
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * All participants must have a negative pregnancy test at the Screening Visit and on admission to the Clinical Unit. * Females of childbearing potential must not be lactating and if heterosexually active, must agree to use an approved method of highly effective contraception. o Hormonal contraceptives and estrogen-containing hormonal methods of birth control are not permitted due to potential effect and influence on the results using a CoC assessment. * Females of non-childbearing potential must be confirmed at the Screening Visit. * Have a Body Mass Index (BMI) between 25 and 40 kg/m2, both inclusive and weigh at least 60 kg for Cohorts 1, 2, and 3 and a BMI of \> 30 kg/m2 for Cohort 4. Exclusion Criteria: * History of any clinically important disease or disorder (gastroparesis, deep vein thrombosis, venous thromboembolism, previous surgery of the upper gastrointestinal tract, cardiovascular disease, neuromuscular or neurogenic disease, severe vitamin D deficiency (cohort 1, cohort 2 and cohort 4), type I or type II diabetes mellitus, glycated hemoglobin (HbA1c) ≥ 6.5% at screening, history of neoplastic disease (cohort 2, cohort 3 and cohort 4), basal calcitonin level \>50 ng/L (50 pg/L) at screening (cohort 2, cohort 3 and cohort 4), history of acute or chronic pancreatitis or pancreatic amylase or lipase \>2×ULN at screening (cohort 2, cohort 3 and cohort 4), prior history of cholecystectomy or untreated cholelithiasis and personal or family history of medullary thyroid cancer (MTC) or multiple endocrine neoplasia type 2 (MEN2) (cohort 2, cohort 3 and cohort 4). * History or presence of gastrointestinal, hepatic, or renal disease or any other condition known to interfere with absorption, distribution, metabolism, or excretion of drugs. * Any clinically important illness, medical/surgical procedure, or trauma. * Any laboratory values with deviations or clinically important abnormalities in clinical chemistry, hematology, or urinalysis. * Any positive result on screening for serum Hepatitis B surface antigen (HBsAg), Hepatitis B core antibody (HBcAb) or Human immunodeficiency virus (HIV). * Abnormal vital signs. * Any clinically important abnormalities in rhythm, conduction, or morphology of the resting 12 lead electrocardiogram (ECG), at screening. * Current smokers or those who have smoked or used nicotine products. * Known or suspected history of alcohol or drug abuse or excessive intake of alcohol. * History of severe allergy/hypersensitivity or ongoing clinically important allergy/hypersensitivity. * Statin treatment within 4 weeks prior to the start of study treatment. * Current use of estrogen-containing products.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
2 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Research Site
RECRUITINGGlendale, California, 91206, United States
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Research Site
RECRUITINGBrooklyn, Maryland, 21225, United States
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