Drug Absorption Clinical Trial
Official title:
Dissolution and Pharmacokinetic of Ginsenosides Released From Cyclodextrin Based Chewable Tablets: a Comparative, Randomized, Crossover, Open-label Study in Healthy Human Subjects.
This study will evaluate the relative bioavailability of ginsenosides Rg5, Rk1, and Ck of Red ginseng HRG80 preparations containing gamma-cyclodextrin (GCD) in the blood plasma of healthy subjects after oral administration of two different formulations of HRG80: A. Capsules containing red ginseng preparation HRG80 (reference product) B. Chewable tablets containing red ginseng preparation HRG80 and GCD (modified product). Dissolution testing measures the rate and extend water solubility of ginsenosides from the reference (A) and the modified (B) products. The difference of in vitro dissolution profiles between the reference (A) and modified (B) products will be assessed.
A growing body of evidence suggests that gamma-cyclodextrin (GCD) can increase the clinical efficacy of water-insoluble biologically active compounds, which have low bioavailability. GCD is the most bio adaptable and applicable to increase the absorption of many drugs, including ginsenosides of Panax ginseng, by forming inclusion complexes or the form of GCD/drug conjugates. Ginsenosides have absolute bioavailability in the range from 0.2% to 48%, depending on the chemical structure and water solubility. Hypothesis: gamma-cyclodextrin increases absorption and bioavailability of active constituents - Ginsenosides Rg5, Rk1, and Compound K (CK). The study aims to provide experimental evidence supporting or rejecting this hypothesis. Sixteen healthy volunteers will be randomly assigned to receive two formulations, A and B, in two consecutive phases (Phase 1 and Phase) of an open-label study with a crossover design. All patients will provide blood samples in each phase in each phase in 0.5, 0.75, 1, 2, 4, 6, 12, 24, and 48 hours (9 points) after drug administration, following will be a washout period for two weeks. Subjects will be fasting for 10.00 hours before administering the investigational product. They will remain in the clinic post-dose until at least 24.00 hours each period, provided they are not suffering from any adverse event. The concentration of ginsenosides Rg5, Rk1, and Ck in all blood samples will be determined using a validated analytical method (HPLC-MS) with the internal standard - digoxin. Appropriate mathematical methods and Kinetic 4.4.1 software will be used to generate basic pharmacokinetic parameters. ;
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