NCT05263245CompletedPhase 2
The Pharmacological Effects of Using Cabozantinib With a Light Breakfast
The Pharmacological Effects of Using Cabozantinib With a Light Breakfast: the Skippy 1 Study
Source: ClinicalTrials.gov · Last updated 3 Sept 2025
Brief summary (registry, in English)
Cabozantinib is a drug which is used to treat metastasized kidney cancer. While it works well, it has a lot of side effects and is quite expensive (€213,- every tablet, €6403,- every month). The standard recommended dose is 60 mg once a day, taken in fasted state. This means patients are not allowed to eat at least 2 hours before and one hour after taking cabozantinib. In daily practice, this is difficult for patients. It might be that by taking with breakfast the chance of side effects like nausea and diarrhea decreases. If patients take cabozantinib with breakfast, the body will have a higher uptake of the drug. Often the dose of cabozantinib has to be lowered due to side effects. All tablets cabozantinib have the same price, despite how many milligrams are in the tablets. Cabozantinib stays in the body for a long time after ingestion. It takes approximately 120 hours before half of the medicine has left the body. This means it might not be necessary to take cabozantinib every day. Therefore, it is interesting to investigate if taking cabozantinib with breakfast makes it possible to skip taking cabozantinib once in a while. In this study, the investigators want to investigate to what extent the exposure of cabozantinib increases after ingestion with a light breakfast. The results from this study will be used for the development of alternative dosing regimens with cabozantinib tablets of 60 mg taken with a light breakfast including skipping days. In this study, patients will randomized to start with taking cabozantinib in fasted state (standard regimen) and taking cabozantinib with a light breakfast (experimental regimen). Menu options will be provided. After at least 4 weeks taking cabozantinib according to the randomized regimen, patients will be submitted to the hospital for one day to measure the amount of cabozantinib in the blood at several points of time. This will be measured by venepuncture and fingerprick microsampling. When all blood samples have been collected, the patient will switch to the other regimen. After at least 4 weeks taking cabozantinib according to the second regimen, venous blood samples will be collected in exactly the same way. After all patients have completed the study, an analysis will be performed to determine the change in exposure to cabozantinib when it is taken with a light breakfast. The results will be used in order to determine the definitive experimental dosing regimens that will be investigated a subsequent study. Patients will be monitored for side effects, especially nausea and/or diarrhea. The primary goal is to investigate to what extent the exposure of cabozantinib increases by taking cabozantinib with a light breakfast compared to taking cabozantinib in fasted state. The secondary objective is to investigate the analytical feasibility of microsampling (finger prick) for cabozantinib concentration measurements and to monitor side effects.
- Status (registry)
- Completed
- Phase (registry)
- Phase 2
- Study type
- Interventional
- Enrollment
- 12 (actual)
- First submitted
- 11 Feb 2022
- Start date
- May 2023
- Primary completion date
- Mar 2025
- Lead sponsor
- dr. Tom van der Hulle
- Diseases
- Kidney cancer
- NCT number
- NCT05263245
What you commit to
- Study type: Interventional · Phase 2
- Participants enrolled: 12
- From May 2023 to the primary completion date, Mar 2025
- 2 sites in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Prior treatment
- Gastro-intestinal abnormalities influencing the absorption of cabozantinib, including active inflammatory bowel diseases, malabsorption syndrome and prior major surgery of the stomach, pancreas, liver or smaller bowel.
- Use of moderate or strong inhibitor of cytochrome P450 enzymes within 1 month of start of treatment with cabozantinib, including ketoconazole, grape fruit juice, clarithromycin, erythromycin, itraconazole and ritonavir.
- Use of moderate or strong inducer of cytochrome P450 enzymes within 1 month of start of treatment with cabozantinib, including rifampicin, phenytoin, carbamazepine, phenobarbital and herbal preparations containing St. John's Wort.
- Use of inhibitor of multidrug resistance-associated protein 2 within 1 month of start of treatment with cabozantinib, including cyclosporine, delavirdine, efavirenz, emtricitabine, benzbromarone and probenecid.
Other
- Inability to follow the recommended light breakfast;
Who the study is looking for
- Willing and able to provide informed consent;
- Aged 18 years or older;
- Histologically confirmed advanced renal cell carcinoma;
- Receiving cabozantinib as monotherapy as treatment for RCC;
- At least 4 weeks on a stable dosage of cabozantinib;
- Acceptable tolerability and the need for dose reductions or treatment interruptions has been estimated as low;
- Eastern Cooperative Oncology Group (ECOG) performance status of 0-2;
- Estimated life expectancy of ≥ 6 months;
- No response evaluation planned during the study period;
- Cabozantinib trough concentration ≤1125 ng/ml in steady state
Age in the registry: 18 years to - · Sex: All · Does not accept healthy volunteers
Sites (2)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Leids Universitair Medisch Centrum Coordinator of this site? Confirm its status | Leiden | Netherlands | Unknown status |
| Erasmus Medical Center Coordinator of this site? Confirm its status | Rotterdam | Netherlands | Unknown status |
Related publications
- The Effect of Taking Cabozantinib with a Light Breakfast: A Randomized Crossover Pharmacokinetic Study (SKIPPY 1).Clin Pharmacokinet · 2026 · PMID 41555108
This page is information, not medical advice. Discuss any trial with your doctor.