Clinical trial NCT00827034: A Phase 1, Randomized, Open-Label, Two-Way Crossover Study To Evaluate The Steady-State Effect Of Dimebon (PF 01913539) On The Single-Dose Pharmacokinetics And Pharmacodynamics Of Warfarin In Healthy Subjects
Official title: A Phase 1, Randomized, Open-Label, Two-Way Crossover Study To Evaluate The Steady-State Effect Of Dimebon (PF 01913539) On The Single-Dose Pharmacokinetics And Pharmacodynamics Of Warfarin In Healthy Subjects
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE1
Conditions: Alzheimer's Disease
Huntington's Disease
Keywords: Dimebon Warfarin Drug-Drug Interaction
Lead sponsor: Pfizer
Sponsor class: INDUSTRY
Collaborators: name: Medivation, Inc.
First posted: 2009-01-22
Enrollment: 14
Sex: ALL
Minimum age (years): 18
Maximum age (years): 55
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Primary purpose: TREATMENT

Brief summary: This study will evaluate the potential drug-drug interaction of Dimebon with the FDA-recommended CYP2C9 substrate warfarin in healthy subjects. Conformance with the guidance includes general study design using a randomized, open label, single-dose warfarin, steady-state Dimebon, 2-sequence, 2-treatment, 2-period crossover design with a minimum 7-day washout period between treatments.


Eligibility criteria: Inclusion Criteria:

* Healthy male and/or female (non-childbearing potential) subjects between the ages of 18 and 55 years, inclusive (Healthy is defined as no clinically relevant abnormalities identified by a detailed medical history, full physical examination, including blood pressure and pulse rate measurement, 12 lead ECG and clinical laboratory tests).
* Prothrombin time (PT)/INR, and partial thromboplastin time (PTT).
* Plasma Protein C and Protein S activity (functional) within the normal reference range.

Exclusion Criteria:

* A known sensitivity or previous intolerance to Dimebon or warfarin.
* Evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurologic, or allergic (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at time of dosing) disease or clinical findings at Screening.
* Subjects receiving warfarin for treatment of active thromboembolic events (ie, pulmonary embolism, deep vein thrombosis), as well as subjects anticoagulated with prosthetic heart valves.

Primary outcomes:
measure: Single dose pharmacokinetics (Cmax, AUCinf) of warfarin 25 mg with and without co-administration of steady-state Dimebon 20 mg TID in healthy adult subjects.
timeFrame: 7+18 days
measure: Single dose pharmacodynamics (INRmax, AUC-INR) of warfarin 25 mg with and without co-administration of steady-state Dimebon 20 mg TID in healthy adult subjects.
timeFrame: 7+18 days
measure: Safety and tolerability ( adverse event monitoring, physical examinations, vital signs, ECG's and clinical laboratory tests) of multiple doses of Dimebon 20 mg TID with a single dose of warfarin 25 mg in healthy adult subjects.
timeFrame: 7+18 days
Secondary outcomes:
Other outcomes:
Locations:
city: New Haven
country: United States
facility: Pfizer Investigational Site
state: Connecticut
Study officials:
affiliation: Pfizer
name: Pfizer CT.gov Call Center
role: STUDY_DIRECTOR
References: