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Drug-Drug Interaction Between Colchicine and Verapamil ER

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ClinicalTrials.gov Identifier: NCT00983242
Recruitment Status : Completed
First Posted : September 24, 2009
Results First Posted : September 24, 2009
Last Update Posted : October 15, 2009
Sponsor:
Information provided by:
Mutual Pharmaceutical Company, Inc.

Brief Summary:
Colchicine is a substrate for both cytochrome P450 3A4 (CYP3A4) and P-glycoprotein (P-gp). Verapamil hydrochloride is a potent inhibitor of cytochrome P450 (CYP) 3A4 and P-gp. This study will evaluate the effect of multiple doses of extended-release verapamil hydrochloride (verapamil HCl ER) on the pharmacokinetic profile of a single 0.6 mg dose of colchicine. A secondary objective is to evaluate the safety and tolerability of this regimen in healthy volunteers. All study subjects will be monitored for adverse events throughout the study period.

Condition or disease Intervention/treatment Phase
Pharmacokinetics Drug: Colchicine Drug: Verapamil HCl ER Phase 1

Detailed Description:
Colchicine is a substrate for both cytochrome P450 3A4 (CYP3A4) and P-glycoprotein (P-gp). Verapamil hydrochloride is a potent inhibitor of cytochrome P450 (CYP) 3A4 and P-gp. This study will evaluate the effect of multiple doses of extended-release verapamil hydrochloride (verapamil HCl ER) on the pharmacokinetic profile of a single 0.6 mg dose of colchicine. On study Day 1 after a fast of at least 10 hours, twenty-four healthy, non-smoking, non-obese, non-pregnant adult volunteers between the ages of 18 and 45 will be given one dose of colchicine (1 x 0.6 mg tablet). Fasting will continue for 4 hours after the dose. Blood samples will be drawn from all participants before dosing and for 24 hours post-dose on a confined basis at times sufficient to adequately define the pharmacokinetics of colchicine. Blood sampling will then continue on a non-confined basis on Days 2-5. After a 14 day washout period, on Day 15 subjects will return to the clinic for dosing of verapamil HCl ER (1 x 240 mg tablet) and a post-dose confinement period of 12 hours. Subjects will return on Days 16-19 for a morning dose of verapamil HCl ER (1 x 240 mg tablet). Verapamil HCl ER doses administered on Days 15-18 will not necessarily be in a fasted state. On the morning of Day 19 after a fast of at least 10 hours, all study participants will receive co-administered single doses of colchicine (1 x 0.6 mg) and verapamil HCl ER (1 x 240 mg). Fasting will continue for 4 hours following these doses and subjects will be confined to the clinic for dosing and for 24 hours after the dose. Blood samples will be drawn at times sufficient to adequately define the pharmacokinetics of colchicine in the presence of verapamil HCL at steady state. Blood sampling will continue on a non-confined basis on Days 20-23. A further goal of this study is to evaluate the safety and tolerability of this regimen in healthy volunteers. Subjects will be monitored throughout participation in the study for adverse reactions to the study drug and/or procedures. Vital signs (blood pressure and pulse) will be measured pre-dose and 1, 2, and 3 hours post-dose on Day 1, pre-dose and 12 hours post-dose on Day 15, and pre-dose and 1, 2 ,3 and 12 hours post-dose on Day 19 to coincide with peak plasma concentrations of both colchicine and verapamil HCl ER. All adverse events whether elicited by query, spontaneously reported, or observed by clinic staff will be evaluated by the Investigator and reported in the subject's case report form.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 24 participants
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: A One-Directional, Open Label Drug Interaction Study to Investigate the Effects of Multiple Dose Verapamil HCl ER on Single Dose Pharmacokinetics of Colchicine in Healthy Volunteers
Study Start Date : September 2008
Actual Primary Completion Date : October 2008
Actual Study Completion Date : October 2008

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Drug Reactions

Arm Intervention/treatment
Active Comparator: Colchicine alone
baseline colchicine pharmacokinetics
Drug: Colchicine
A single dose of 0.6 mg colchicine administered alone at 8am on Day 1 after an overnight fast of at least 10 hours.

Experimental: Colchicine with Verapamil HCl ER
colchicine pharmacokinetics in presence of steady-state verapamil
Drug: Verapamil HCl ER
One 240 mg verapamil HCl ER tablet taken at 8am on Days 15-18 without regard to meals and along with colchicine at 8am on Day 19 after an overnight fast of at least 10 hours.

Drug: Colchicine
A single dose of 0.6 mg colchicine administered along with verapamil HCL ER at 8 am on Day 19 after an overnight fast of at least 10 hours.




Primary Outcome Measures :
  1. Maximum Plasma Concentration (Cmax) [ Time Frame: On Days 1 and 19 - serial pharmacokinetic blood samples were collected pre-dose and at 0.5, 1.0, 1.5, 2, 3, 4, 5, 6, 8, 12, 24, 36, 48, 72, and 96 hours post-dose. ]
    The maximum or peak concentration that colchicine reaches in the plasma.

  2. Area Under the Concentration Versus Time Curve From Time 0 to Time t [AUC(0-t)] [ Time Frame: On Days 1 and 19 - serial pharmacokinetic blood samples were collected pre-dose and at 0.5, 1.0, 1.5, 2, 3, 4, 5, 6, 8, 12, 24, 36, 48, 72, and 96 hours post-dose. ]
    The area under the plasma concentration versus time curve beginning from the first dose (time 0) to the last measurable colchicine concentration (time t), as calculated by the linear trapezoidal method.

  3. Area Under the Concentration Versus Time Curve From Time 0 Extrapolated to Infinity [AUC(0-∞)] [ Time Frame: On Days 1 and 19 - serial pharmacokinetic blood samples were collected pre-dose and at 0.5, 1.0, 1.5, 2, 3, 4, 5, 6, 8, 12, 24, 36, 48, 72, and 96 hours post-dose. ]
    The area under the plasma concentration versus time curve from time 0 to infinity. AUC(0-∞) was calculated as the sum of AUC(0-t) plus the ratio of the last measurable colchicine plasma concentration to the elimination rate constant.



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Ages Eligible for Study:   18 Years to 45 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Healthy adults 18-45 years of age, non-smoking and non-pregnant (post-menopausal, surgically sterile or using effective contraceptive measures) with a body mass index (BMI) greater than or equal to 18 and less than or equal to 32, inclusive.

Exclusion Criteria:

  • Recent participation (within 28 days) in other research studies
  • Recent significant blood donation or plasma donation
  • Pregnant or lactating
  • Test positive at screening for human immunodeficiency virus (HIV), hepatitis B surface antigen (HbsAg), or hepatitis C virus (HCV)
  • Recent (2-year) history or evidence of alcoholism or drug abuse
  • History or presence of significant cardiovascular, pulmonary, hepatic, gallbladder or biliary tract, renal, hematologic, gastrointestinal, endocrine, immunologic, dermatologic, neurologic, or psychiatric disease
  • Subjects who have used any drugs or substances known to inhibit or induce cytochrome (CYP) P450 enzymes and/or P-glycoprotein (P-gp) within 28 days prior to the first dose and throughout the study
  • Drug allergies to colchicine or verapamil

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00983242


Locations
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United States, Minnesota
PRACS Institute, Ltd. - Cetero Research
East Grand Forks, Minnesota, United States, 56721
Sponsors and Collaborators
Mutual Pharmaceutical Company, Inc.
Investigators
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Principal Investigator: Anthony R Godfrey, PharmD PRACS - Cetero
Additional Information:
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
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Responsible Party: Vice President, Branded Products and Medical Affairs, Mutual Pharmaceutical Company, Inc.
ClinicalTrials.gov Identifier: NCT00983242    
Other Study ID Numbers: MPC-004-08-1014
First Posted: September 24, 2009    Key Record Dates
Results First Posted: September 24, 2009
Last Update Posted: October 15, 2009
Last Verified: October 2009
Additional relevant MeSH terms:
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Colchicine
Verapamil
Gout Suppressants
Antirheumatic Agents
Tubulin Modulators
Antimitotic Agents
Mitosis Modulators
Molecular Mechanisms of Pharmacological Action
Antineoplastic Agents
Anti-Arrhythmia Agents
Calcium Channel Blockers
Membrane Transport Modulators
Calcium-Regulating Hormones and Agents
Physiological Effects of Drugs
Vasodilator Agents