Phase III Randomized Study of Hypericum Perforatum (St. John's Wort) Combined With Docetaxel in Patients With Unresectable Solid Tumors
OBJECTIVES:
- Determine the effect of Hypericum perforatum (St. John's Wort) on the pharmacokinetic
clearance of docetaxel in patients with unresectable solid tumors.
- Determine the effect of Hypericum perforatum on the production and plasma
concentrations of M4-C13-hydroxydocetaxel in these patients.
- Determine the effects of this drug on the pharmacodynamics of docetaxel in these
patients.
- Determine the relationship between the effects of this drug on docetaxel metabolic
clearance and CYP3A4/CYP3A5 genotype in these patients.
- Determine the relationship between the effect of this drug on docetaxel metabolic
clearance and p-glycoprotein genotype in these patients.
- Determine the relationship between the effect of this drug on docetaxel clearance and
pregnane receptor genotype in these patients.
- Assess compliance with this drug in these patients.
- Assess the steady state concentrations of hyperforin, one of the putative psychoactive
components of Hypericum perforatum, in these patients.
OUTLINE: This is a randomized, double-blind, placebo-controlled study. Patients who have not
been receiving chronic Hypericum perforatum (St. John's Wort) are assigned to group A, while
a cohort of 8 patients who have been receiving chronic Hypericum perforatum are assigned to
group B.
- Patients are randomized to 1 of 2 treatment arms.
- Arm I: Patients receive oral placebo three times daily on days 1-14 and docetaxel IV
over 1 hour on day 15.
- Arm II: Patients receive oral Hypericum perforatum three times daily on days 1-14 and
docetaxel as in arm I.
- Group B (non-randomized group): Patients receive docetaxel as in arm I and continue to
receive their chronic regimen of Hypericum perforatum except on day 15.
Treatment in both groups repeats every 21 days for 2 courses in the absence of disease
progression or unacceptable toxicity.
Patients are followed for new primaries and survival only.
PROJECTED ACCRUAL: Approximately 92 patients will be accrued for this study.
Interventional
Primary Purpose: Treatment
Lionel D. Lewis, MD
Study Chair
Norris Cotton Cancer Center
United States: Federal Government
CDR0000069449
NCT00041171
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