Drug-Interaction Assessment of GSK3772701 in Healthy Male and Female Participants Aged 18 to 55 Years

Recruiting now · Phase 1

Conditions studied: Malaria, Falciparum

In brief

This study aims to evaluate whether GSK3772701 alters the pharmacokinetics (PK) of midazolam (MDZ), a standard probe substrate for the CYP3A4 enzyme. The findings are planned to be used to determine whether GSK3772701 acts as an inducer and/or inhibitor of CYP3A4 and will help guide recommendations for safe co-administration with CYP3A4 substrates.

Key facts

Study ID

NCT07670377

Run by

GlaxoSmithKline

People needed

20

Starts

2026-06-26

Expected to finish

2026-08-24

Last updated by the study team

2026-07-21

Who can join

Age: 18 and older, up to 55. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Aged 18 to 55 years (inclusive), at the time of signing the informed consent form (ICF).
• Weight of at least 50 kg with a body-mass index <=18.0 and <=30.0 kg/m².
• Written informed consent obtained from the participant prior to performance of any study specific procedure, and which includes agreement to compliance, with the requirements and restrictions listed in the ICF and in this protocol.
• Participants, who, in the opinion of the investigator, can and will comply with the requirements of the protocol (e.g., completion of study assessments, return for follow-up visits).
• Participants who are healthy as established by medical evaluation including medical history, physical examination, cardiac monitoring, and clinical laboratory assessment before entering into the study.
• Contraception:
• Male participants are eligible to participate.
• A female participant is eligible to participate if they are not pregnant or breastfeeding, and one of the following conditions applies:
• Is a participant of non-childbearing potential (PONCBP). OR
• Is a POCBP and using a contraceptive method that is highly effective, with a failure rate of <1%, for 30 days prior to and during the study intervention period and for at least 7 days after the last dose of GSK3772701 and at least 2 days after the last dose of MDZ.
• A POCBP must have a negative highly sensitive pregnancy test (urine or serum as required by local regulations) at Screening and within 24 hours before the first dose of study intervention.
• A blood sample for simultaneous follicle-stimulating hormone (FSH) may be collected, and estradiol levels may be included at investigator's discretion to confirm non-reproductive potential when menopausal status is uncertain according to the local laboratory reference range.

You may not qualify if…

• History or presence/significant history of or current cardiovascular, respiratory, hepatic, renal, urological, gastrointestinal, immunological, dermatological, endocrine, hematologic, neurological, or psychiatric disorders capable of significantly altering the absorption, metabolism, or elimination of drugs; constituting a risk when taking the study intervention or interfering with the interpretation of data.
• Any condition where the administration of MDZ could be contraindicated, including but not limited to, hypersensitivity (MDZ, any of its excipients, or to any benzodiazepines), sleep apnea, glaucoma (narrow-angle glaucoma, acute or open angle glaucoma, untreated), myasthenia gravis, respiratory insufficiency, impaired pulmonary function, or severe hepatic impairment.
• History of any malignancy within the past 5 years. Exceptions are squamous and basal cell carcinomas of the skin and carcinoma in situ of the cervix, or malignancy which is considered cured with minimal risk of recurrence. Participants under evaluation for possible malignancy are not eligible.
• History of any reaction or hypersensitivity likely to be exacerbated by any component (formulation, capsule, or excipients) of the study intervention(s) (including hypromellose [hydroxypropyl methylcellulose] for GSK3772701) or allergies to cherries (as per MDZ USPI).
• Acute or chronic clinically significant pulmonary, endocrinological, cardiovascular, muscular, neurological, hepatic, or renal functional abnormality, as determined by physical examination or laboratory screening tests.
• Participants should have baseline clinical laboratory values (renal, hepatic, and hematological) within normal limits or clinically acceptable to the investigator. A participant with a clinical abnormality or laboratory parameter(s) which is/are not specifically listed in the inclusion or exclusion criteria, or outside the normal reference range for the population being studied, may be included only if the investigator considers that the finding is unlikely to introduce additional risk factors for the participant and will not interfere with the study procedures or endpoints.
• Participants with supine blood pressure (BP) >=140 mm Hg (systolic) or >=90 mm Hg (diastolic).
• Estimated glomerular filtration rate (eGFR) of <80 mL/min/1.73 m2 calculated using the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) Creatinine Equation (2021).
• The participant must agree to and adhere to the concomitant therapy (including non-drug therapies) restrictions from the Screening Visit through to the end of the study.
• Any other clinical condition that, in the opinion of the investigator, might pose an additional risk to the participant due to participation in the study or would make adhering to study procedures for the duration of the study difficult.
• Sensitivity to heparin or heparin-induced thrombocytopenia.
• Past or intended use of over-the-counter or prescription medication (including herbal medications, vitamins and supplements) within 7 days (or 14 days if the drug is a potential enzyme inducer), or 5 times the half-life (whichever is longer) prior to dosing.
• Treatment with biologic agents (such as monoclonal antibodies including marketed drugs) or investigational drugs or non-registered product (drug, vaccine, or medical device) within 3 months or 5 times the half-life (whichever is longer) prior to dosing.
• Exposure to more than 4 new chemical entities within 12 months prior to the first dosing day.
• Current or prior enrolment in this or any other clinical study involving an investigational study intervention, or any other type of medical research, within the last 30 days or 5 half-lives, whichever is longer, prior to signing of the ICF.
• Participants who screen fail for the current study are not eligible for re-screening or enrollment.
• Positive drug/alcohol screen, including tetrahydrocannabinol at Screening or Admission.
• Cotinine levels indicative of smoking or history or regular use of tobacco- or nicotine containing products within 6 months prior to Screening.
• Positive human immunodeficiency virus (HIV) antibody test.
• Regular alcohol consumption within 6 months prior to the clinical study defined as: An average weekly alcohol intake of 14 units for males or 7 units for females. One unit is equivalent to 8 g of alcohol: a half-pint. (approximately 240 mL) of beer, 1 glass (125 mL) of wine or 1 measure (25 mL) of spirits.
• Regular use of combustible tobacco products, and non-combustible nicotine delivery systems, inclusive of cigarettes, cigars, pipes, and materials used to "vape".
• Participants who have lost or donated over 500 mL of blood within 90 days prior to enrollment or intend to donate blood or blood products during the study.
• Participants who have donated plasma within 7 days prior to enrollment.
• Any study personnel or their immediate dependents, family, or household members.
• Regular use of known drugs of abuse, including tetrahydrocannabinol.

Where it is running

• GSK Investigational Site — Miami, Florida, United States (enrolling)

Full record on ClinicalTrials.gov

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