Olanzapine Versus Megestrol Acetate for the Treatment of Loss of Appetite Among Advanced Cancer Patients

Phase 3

Recruiting

• Conditions: Anorexia; Hematopoietic and Lymphoid Cell Neoplasm; Advanced Malignant Solid Neoplasm
• Interventions: Drug: Olanzapine; Drug: Megestrol Acetate; Other: Questionnaire Administration

• Registration Number: NCT04939090
• Lead Sponsor: Alliance for Clinical Trials in Oncology

Brief Summary

This phase III trial compares the effects of olanzapine versus megestrol acetate in treating loss of appetite in patients with cancer that has spread to other places in the body (advanced). Olanzapine may stimulate and increase appetite. This study aims to find out if olanzapine is better than the usual approach (megestrol acetate) for stimulating appetite and preventing weight loss.

Detailed Description

The primary and secondary objectives of the study:

PRIMARY OBJECTIVE:

I. To determine whether olanzapine leads to greater appetite improvement from baseline in cancer patients suffering from anorexia compared to megestrol acetate using the 0-10 numerical rating scale (NRS).

SECONDARY OBJECTIVES:

I. To determine whether olanzapine leads to a greater proportion of patients who report a 5% or greater weight gain from baseline compared to megestrol acetate.

II. To compare change in cachexia/anorexia symptoms with olanzapine compared to megestrol acetate using the Functional Assessment of Anorexia/Cachexia Treatment (FAACT)-Anorexia/Cachexia Subscale (A/CS) instrument.

OUTLINE: Patient are randomized to 1 of 2 arms.

ARM I: Patients receive olanzapine orally (PO) once daily (QD) for up to 4 weeks in the absence of consent withdrawal or unacceptable toxicity.

ARM II: Patients receive megestrol acetate PO QD for up to 4 weeks in the absence of consent withdrawal or unacceptable toxicity.

Study Timeline

• Study First Submitted: 2021-06-17
• Study First Submitted QC: 2021-06-17
• Study First Posted: 2021-06-25
• Study Start: 2022-01-03
• Status Verified: 2025-06
• Last Update Submitted: 2025-06-24
• Last Update Posted: 2025-06-26
• Primary Completion: 2026-04-01
• Study Completion: 2026-12-31

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 360

Inclusion Criteria

• Women and men of reproductive potential should agree to use an appropriate method of birth control throughout their participation in this study due to the teratogenic potential of the therapy utilized in this trial. Appropriate methods of birth control include abstinence, oral contraceptives, implantable hormonal contraceptives or double barrier method (diaphragm plus condom)
• Diagnosis of advanced cancer
• Patient-reported 2-month weight loss of at least 5 pounds (2.3 kilograms) and/or physician-estimated caloric intake of less than 20 calories/kilogram of body weight per day
• The patient must perceive loss of appetite and/or weight as a problem; and have an appetite score of 4 or worse on the "Please rate your appetite...." question that requires a patient response on a 0-10 numeric rating scale
• Not receiving ongoing tube feedings or parenteral nutrition at the time of registration
• Not currently using systemic adrenal steroids (with the exception of short-term dexamethasone within 3 days of chemotherapy for control of chemotherapy side effects)
• No use of androgens, progesterone analogs, or other appetite stimulants within the past month
• Patient should not have poorly controlled hypertension or congestive heart failure at registration
• Patient should not have an obstruction of the alimentary canal, malabsorption, or intractable vomiting (defined as vomiting more than 3 times per day over the preceding week)
• Not currently using olanzapine for another medical condition or had previously used olanzapine for chronic nausea or for any pre-existing psychotic disorder
• Patient should not have had a previous blood clot at any time in the past
• No history of poorly controlled diabetes
• No symptomatic leptomeningeal disease or known brain metastases as these patients may have difficulty taking oral medications
• No history of hypersensitivity to olanzapine or megestrol acetate
• No COVID-19 infection in the past that, in the opinion of the treating physician, had left patients with compromised taste, which has not resolved at the time of registration
• Not pregnant and not nursing, because this study involves an investigational agent whose genotoxic, mutagenic and teratogenic effects on the developing fetus and newborn are unknown. Therefore, for women of childbearing potential only, a negative urine or serum pregnancy test done =< 14 days prior to registration is required
• Age >= 18 years
• Eastern Cooperative Oncology Group (ECOG) performance status 0, 1 or 2
• Estimated life expectancy of 3 months or longer
• Serum creatinine =< 2.0 mg/dL
• Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) =< 3 x upper limit of normal (ULN)
• Fasting glucose < 140 mg/dL
• Granulocytes > 1000/hpf
• No treatment with another antipsychotic agent, such as risperidone, quetiapine, clozapine, butyrophenone within 30 days of enrollment
• In order to complete the mandatory patient-completed measures, participants must be able to speak and/or read English or Spanish. Sites seeking to enroll Spanish-speaking patients should have access to Spanish speaking staff on site or through the use of a translation service to be able to conduct the informed consent discussion in Spanish, and to conduct the weekly phone calls

Exclusion Criteria

• Psychiatric illness which would prevent the patient from giving informed consent
• Medical condition such as uncontrolled infection (including human immunodeficiency virus [HIV]), uncontrolled diabetes mellitus or cardiac disease which, in the opinion of the treating physician, would make this protocol unreasonably hazardous for the patient
• Patients who cannot swallow oral formulations of the agents
• Patients with impaired decision-making capacity (such as with a diagnosis of dementia or memory loss) are not eligible for this study
• No presence of a hormone-sensitive tumor, such as breast, endometrial, or prostate cancer (this exclusion criterion is intended to circumvent any confounding antineoplastic effects of megestrol acetate)

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Arm I (olanzapine)	Olanzapine	Patients receive olanzapine PO QD for up to 4 weeks in the absence of disease progression or unacceptable toxicity.
Arm II (megestrol acetate)	Megestrol Acetate	Patients receive megestrol acetate PO QD for up to 4 weeks in the absence of disease progression or unacceptable toxicity.
Arm I (olanzapine)	Questionnaire Administration	Patients receive olanzapine PO QD for up to 4 weeks in the absence of disease progression or unacceptable toxicity.
Arm II (megestrol acetate)	Questionnaire Administration	Patients receive megestrol acetate PO QD for up to 4 weeks in the absence of disease progression or unacceptable toxicity.

Primary Outcome Measures

Name	Time	Method
Change in appetite	Baseline up to 4 weeks	Will be compared between the two study groups (olanzapine versus megestrol acetate) using a 0-10 numerical rating scale. Will be summarized by mean (standard deviation \[SD\]) and median (range) by treatment arm. The difference in appetite change from baseline to 4 weeks of treatment between arms will be estimated along with a 95% confidence interval and will be compared using a t-test or Wilcoxon rank-sum test as appropriate.

Secondary Outcome Measures

Name	Time	Method
Change in well-being status and cachexia/anorexia symptoms	Baseline up to 4 weeks	Responses to the Functional Assessment of Anorexia/Cachexia Treatment (FAACT)-Anorexia/Cachexia Subscale (A/CS) questionnaire will be scored according to the established algorithm. The total score of the FAACT-A/CS will be summarized weekly and the change from baseline to 4 weeks will be compared between the treatment arms using the same methods described for the primary endpoint.
Proportion of patients who report a 5% or greater weight gain	Baseline up to 4 weeks	The proportion of patients with a 5% or greater weight gain from baseline will be calculated for each arm. The difference in proportion of patients with 5% or greater weight gain between the arms will be estimated along with a 95% confidence interval using a normal approximation of the binomial distribution and will be compared using a Chi-squared test.

Trial Locations

Locations (284)

Arizona Center for Cancer Care - Gilbert; 🇺🇸 Gilbert, Arizona, United States

CTCA at Western Regional Medical Center; 🇺🇸 Goodyear, Arizona, United States

Arizona Center for Cancer Care-Peoria; 🇺🇸 Peoria, Arizona, United States

Arizona Center for Cancer Care - Phoenix; 🇺🇸 Phoenix, Arizona, United States

Arizona Center for Cancer Care - Osborn; 🇺🇸 Scottsdale, Arizona, United States

Arizona Center for Cancer Care - Scottsdale; 🇺🇸 Scottsdale, Arizona, United States

Arizona Center for Cancer Care-Surprise; 🇺🇸 Surprise, Arizona, United States

NEA Baptist Memorial Hospital and Fowler Family Cancer Center - Jonesboro; 🇺🇸 Jonesboro, Arkansas, United States

Epic Care-Dublin; 🇺🇸 Dublin, California, United States

Epic Care Partners in Cancer Care; 🇺🇸 Emeryville, California, United States

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