The Influence of Phenotype, Grapefruit Juice and Orange Juice on the Pharmacokinetics of Sunitinib in Cancer Patients

All patients receive once daily 50 mg sunitinib for 6 weeks in the registered schedule of 4 weeks on two weeks off treatment.

All patients receive three times midazolam 7,5 mg on PK day 1,2, and 3 e.g. between day 14-21 of treatment, on day 28 of treatment and on day 42 of treatment.

The orange juice will be administered 3 times per day for 1 period of 3 days in the 4th week of treatment with sunitinib, just before PK day 2 on day 28 of treatment

The grapefruit juice will be administered 3 times per day for 1 period of 3 days in the 4th week of treatment with sunitinib, just before PK day 2 on day 28 of treatment