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NCT07573163PHASE2Recruiting

Tirzepatide Following Adrenalectomy in Mild Autonomous Cortisol Secretion

Alaa Sada

Start Date

7/27/2026

Completion Date

12/31/2028

Summary

Mild Autonomous Cortisol Secretion (MACS) is a condition in which an adrenal gland produces excess cortisol and is associated with high blood pressure, diabetes, and weight gain. Surgical removal of the adrenal gland (adrenalectomy) is standard treatment, but some patients continue to have metabolic health problems after surgery. This randomized study will evaluate whether treatment with tirzepatide after adrenalectomy improves metabolic outcomes in patients with MACS compared with adrenalectomy alone.

Detailed Description

This prospective, randomized study will enroll adults with MACS and elevated blood pressure who are undergoing unilateral adrenalectomy. Following surgery, participants will be randomized in a 1:1 ratio to one of two groups: adrenalectomy alone or adrenalectomy followed by tirzepatide therapy for 12 months. Tirzepatide will be prescribed and managed by the study team in accordance with current standard-of-care practices, including routine clinical monitoring and dose adjustments. The primary focus of the study is to evaluate blood pressure control at 12 months. Secondary outcomes include change in body weight, body mass index, glycemic control, medication burden, and patient-reported quality of life. This study aims to generate preliminary data on the feasibility, safety, and potential additive metabolic benefits of combining pharmacologic incretin-based therapy with surgical management of MACS.

Eligibility Criteria

Age Range: 18 years to No maximum

Inclusion Criteria: * Adults aged 18 years and older * Diagnosis of MACS, defined as morning cortisol \>1.8 mcg/dL after a 1 mg dexamethasone suppression test * Elevated blood pressure (SBP ≥120 mmHg or DBP ≥80 mmHg per the 2025 American College of Cardiology/American Heart Association \[ACC/AHA\] criteria, or current use of antihypertensive medication) * BMI ≥27 * Undergoing or having undergone adrenalectomy for the treatment of MACS Exclusion Criteria: * Bilateral adrenal lesions * Adrenal malignancy * Concurrent primary aldosteronism with MACS * Current use of GLP-1 receptor agonists * Personal or family history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia type 2 (MEN2) * Pregnancy or breastfeeding

Interventions

DRUG

Tirzepatide

OTHER

Standard medical treatment

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Conditions

Mild Autonomous Cortisol Secretion (MACS)Adrenalectomy; Status

Locations

University of Pittsburgh Medical Center

Pittsburgh, Pennsylvania 15213

United States