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Completed

NCT Number: NCT01386593

Pharmacokinetic Study to Characterize Phenotyping Metrics of the "Basel" Cocktail After CYP Induction or Inhibition

The purpose of this study is to assess how the pharmacokinetic profiles of each drug of a cocktail of six approved drugs (so-called "Basel cocktail") change when the cytochrome P450 system is inhibited or induced.

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Key information

Age range

18 year–35 year

Sex eligibility

Male

Study type

Interventional

Phase

Phase 1

Primary location

Phase I Research Unit, University Hospital

Basel, Switzerland

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Male aged between 18 and 35 years (inclusive) at screening.
  • No clinically significant findings on the physical examination at screening.
  • Body mass index (BMI) between 18 and 28 kg/m2 (inclusive) and body weight at least 50 kg at screening.
  • Systolic blood pressure (SBP) 100-145 mmHg, diastolic blood pressure (DBP) 50-90 mmHg and heart rate (HR) 45-90 bpm (inclusive).
  • 12-lead electrocardiogram (ECG) without clinically relevant abnormalities at screening.
  • Hematology and clinical chemistry results not deviating from the normal range to a clinically relevant extent at screening.
  • Ability to communicate well with the investigator and to understand and comply with the requirements of the study.

Exclusion criteria

  • Known hypersensitivity to any excipients of the drug formulations.
  • Treatment with another investigational drug within 30 days prior to screening.
  • History or clinical evidence of alcoholism or drug abuse within the 3-year period prior to screening.
  • Positive results from urine drug screen at screening.
  • Excessive caffeine consumption, defined as >800 mg per day at screening*.
  • African or Hispanic ethnicity.
  • History or clinical evidence of any disease and/or existence of any surgical or medical condition, which might interfere with the absorption, distribution, metabolism or excretion of the study drugs, or which might increase the risk for toxicity.
  • Smoking within the last 3 months prior to screening.
  • Previous treatment with any prescribed or OTC medications (including herbal medicines such as St John's Wort) within 2 weeks prior to the intended start of study.
  • Loss of 250 ml or more of blood within 3 months prior to screening.
  • Any circumstances or conditions, which, in the opinion of the investigator, may affect full participation in the study or compliance with the protocol.
  • Legal incapacity or limited legal capacity at screening.

Treatment and study plan

Basel cocktail+(Fluconazole, Ciprofloxacin, Paroxetine)

Drug

"Basel" Cocktail

Drug

Basel cocktail + Rifampicin

Drug

Primary outcomes

  1. Area under the plasma concentration versus time curve from timepoint 0 to 24 h (AUC24h) of the "Basel Cocktail" after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

Secondary outcomes

  1. Area under the plasma concentration versus time curve from timepoint 0 to infinity (AUC0-inf) of the "Basel Cocktail" after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

  2. Peak Plasma Concentration (Cmax) of the "Basel Cocktail" after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

  3. Peak Time (Tmax) of the "Basel Cocktail" in plasma after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

  4. Plasma Halflife (t1/2) in the elimination phase of the "Basel Cocktail" after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

  5. Area under the concentration in oral fluid versus time curve from timepoint 0 to 24 h (AUC24h) of the "Basel Cocktail" after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

  6. Area under the concentration in oral fluid versus time curve from timepoint 0 to infinity (AUC0-inf) of the "Basel Cocktail" after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

  7. Peak Concentration (Cmax) of the "Basel Cocktail" in oral fluid after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

  8. Peak Time (Tmax) of the "Basel Cocktail" in oral fluid after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

  9. Halflife (t1/2) in the elimination phase of the "Basel Cocktail" in oral fluid after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

  10. Area under the concentration in dried blood spots versus time curve from timepoint 0 to 24 h (AUC24h) of the "Basel Cocktail" after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

  11. Area under the concentration in dried blood spots versus time curve from timepoint 0 to infinity (AUC0-inf) of the "Basel Cocktail" after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

  12. Peak Concentration (Cmax) of the "Basel Cocktail" in dried blood spots after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

  13. Peak Time (Tmax) of the "Basel Cocktail" in dried blood spots after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

  14. Halflife (t1/2) in the elimination phase of the "Basel Cocktail" in dried blood spots after inhibition with ciprofloxacin, fluconazole and paroxetine and after induction with rifampicin.

Sponsors and collaborators

Lead sponsor

University Hospital, Basel, Switzerland

Other

Registry information

Official study title

Single-center, Randomized, Open-label, Two-way Crossover Study to Characterize Phenotyping Metrics of the "Basel" Cocktail After CYP Induction or Inhibition in Healthy Male Subjects

Important dates

Study start
2011
Primary completion
2012
Study completion
2012
First posted
Jul 1, 2011
Registry last updated
Apr 17, 2015

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.