CompletedNot Applicable

Drug Interaction With Envarsus XR and Grapefruit Juice

United States11 participantsStarted 2019-10-25

Plain-language summary

Transplant patients must take lifelong immunosuppression in order to prevent rejection of their organ. Tacrolimus is the most widely used immnosuppressive agent. Part of the routine education given to patients regarding tacrolimus is that they must avoid many drugs and substances that can interact with tacrolimus so that they don't experience side effects or lack of effect. Patients are told they must avoid readily available substances such as grapefruit juice and St. John's wort. A new once daily formulation of tacrolimus, Envarsus XR, may bypass the place in the gut in which many of these drug interactions occur. We will give kidney transplant patients Envarsus with and without grapefruit juice and measure the effect on blood levels throughout the day. Results from this study will also give us information about the likelihood of other drugs interacting with Envarsus XR.

Who can participate

Age range

18 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Primary Kidney Transplant Age \> 18 years At least 3 months post-transplantation Taking a stable dose of tacrolimus extended release with a target trough of 8-10 ng/mL BMI between 18-32 Exclusion Criteria: * Multi-organ transplant Concomitant use of mTOR inhibitor Concomitant use of belatacept Concomitant use of medication affecting CYP3A or P-gp History of rejection Hypersensitivity to midazolam Hypersensitivity to Envarsus Active diarrhea or constipation BMI \< 18 or \> 32

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

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Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Tacrolimus AUC before and after Grapefruit Juice

Timeframe: 2-4 weeks

Trial details

NCT IDNCT03916380

SponsorShirley M. Tsunoda

Sponsor typeOTHER

Study typeOBSERVATIONAL

Primary completion2022-12-31

View on ClinicalTrials.gov More Kidney Transplant; Complications trials