Study to Compare Capsule and Liquid Formulations of Enzalutamide After Single Dose Administration Under Fasting Conditions in Prostate Cancer

Stopped early · Phase 1

Conditions studied: Prostate Cancer

In brief

Background: Enzalutamide is given to treat metastatic prostate cancer. But it takes 4 pills to deliver the effective dose. This can be difficult for people already taking multiple drugs. And swallowing may be difficult for some people. Researchers want to test out a new way of giving enzalutamide by mouth. They want to see if giving a person the liquid taken from inside the standard 4 gelatin capsules is handled by the body in the same way as giving them the capsules whole. Objectives: To compare how capsule and liquid forms of enzalutamide are handled by people with prostate cancer. Eligibility: Men at least 18 years old with prostate cancer Design: Participants will be screened with a heart test (electrocardiogram), medical history, and physical exam. A tissue sample or lab reports will be reviewed. During the study, participants will repeat screening tests and have urine tests. Participants will be randomly assigned to get the study drug in one of two orders: either the as capsules then the liquid form (Arm A) or as the liquid form then the capsule form (Arm B). Participants will be counseled about birth control. The study will have 2 periods with a minimum 42 day break in between. On Day 1 of Period 1 and Day 1 of Period 2, participants will be admitted to the hospital. They will get one dose of the study drug. They cannot eat or drink anything except water for at least 10 hours before and for 4 hours after the study drug. Their blood will be sampled over 24 hours. Lunch and dinner will be served. Participants will answer questions after taking the liquid form. Participants will have blood drawn on Day 3, Day 8, and Day 42.

Key facts

Study ID

NCT03478904

Run by

National Cancer Institute (NCI)

People needed

1

Starts

2020-03-10

Expected to finish

2020-11-30

Last updated by the study team

2021-05-10

Who can join

Age: 18 and older. Sex: male. Healthy volunteers: not accepted.

You may not qualify if…

• Patients who are receiving any other investigational agents (in the past 28 days) or herbal medications (within 7 days).
• Patients must not be on enzalutamide within five half-lives before the first planned dose of the study drug or anticipating to start enzalutamide within the next 3 months of the first planned dose of study drug
• History of allergic reactions attributed to compounds of similar chemical or biologic composition to enzalutamide or other agents used in study.
• Clinically significant cardiac disease, e.g. New York Heart Association (NYHA) classes III-IV; uncontrolled angina, uncontrolled arrhythmia or uncontrolled hypertension, myocardial infarction in the previous 6 months as confirmed by an electrocardiogram (ECG).
• Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements
• Patients who are taking medications that may alter the metabolism of enzalutamide. This includes the following: strong or moderate cytochrome P450 family 2 subfamily C member 8 (CYP2C8) inhibitors or inducers; strong cytochrome P450 family 3 subfamily A member 4 (CYP3A4) inhibitors or inducers; or Cytochrome P450 2C9 (CYP2C9), 2C19 or 3A4 substrates with a narrow therapeutic index.
• History of seizure, including any febrile seizure, loss of consciousness, or transient ischemic attach, or any condition that may pre-dispose to seizure (e.g. prior stroke, brain arteriovenous malformation, head trauma with loss of consciousness requiring hospitalization).

Where it is running

• National Institutes of Health Clinical Center — Bethesda, Maryland, United States

Full record on ClinicalTrials.gov

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