Open-Label Drug Interaction Study Evaluating Desvenlafaxine Succinate Sustained Release (DVS SR) 100mg On The Pharmacokinetics Of Tamoxifen When Coadministered To Healthy Post-Menopausal Female Subjects

Pharmacokinetics Clinical Trial

Official title:

An Open-Label, 2-Period Sequential Drug Interaction Study To Evaluate The Effect Of A 100 Mg Dose Of Desvenlafaxine SR On The Pharmacokinetics Of Tamoxifen When Co-Administered In Healthy Post-Menopausal Female Subjects

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01189500
• Other study ID #: B2061027
• Secondary ID: 3151A1-1206
• Status: Completed
• Phase: Phase 4
• First received: August 25, 2010
• Last updated: November 1, 2011
• Start date: August 2010
• Est. completion date: October 2010

Study information

• Verified date: November 2011
• Source: Pfizer
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Food and Drug Administration
• Study type: Interventional

Clinical Trial Summary

The goal of this study is to evaluate the effect of multiple doses of Desvenlafaxine SR on the pharmacokinetics of Tamoxifen and endoxifen when coadministered to healthy post-menopausal female subjects. This study will also evaluate the safety and tolerability of Desvenlafaxine SR and Tamoxifen when coadministered to healthy post-menopausal female subjects.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 30
• Est. completion date: October 2010
• Est. primary completion date: October 2010
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Female
• Age group: 45 Years and older

Eligibility

Inclusion Criteria:

• Healthy post-menopausal female subjects, at least 45 years of age, with confirmed post-menopausal status

• Hysterectomized subjects

• Body Mass Index (BMI) less than or equal to 34.0 kg/m2

• Nonsmoker or smoker of fewer than 5 cigarettes per day as determined by history

• An informed consent document signed and dated by the subject

Exclusion Criteria:

• History of significant blood, kidney, endocrine, lung, gastrointestinal, heart, liver, psychiatric, neurologic, or allergic disease

• Presence or history of deep vein thrombosis or transient ischemic attack

• History of seizure disorder

• Presence or history of glaucoma or increased intraocular pressure

• Allergy to or unable to tolerate tamoxifen, desvenlafaxine, or venlafaxine

• History of substance abuse within 1 year of study

• A positive urine drug screen

• Treatment with an investigational drug within 30 days

• Consumption of grapefruit or grapefruit related citrus fruits

• 12 lead ECG demonstrating QTc >450 msec at screening

• Pregnant or nursing females

• Use of prescription or nonprescription drugs and dietary supplements

• History of sensitivity to heparin or heparin induced thrombocytopenia

• Severe acute or chronic medical or psychiatric condition or laboratory abnormality

• Use of CYP 2D6 inhibitors and CYP 3A4 inhibitors/inducers

Study Design

Allocation: Non-Randomized, Endpoint Classification: Pharmacokinetics Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Basic Science

Related Conditions & MeSH terms

• Pharmacokinetics

Intervention

Drug:
• Tamoxifen
Period 1-Tamoxifen 40mg on study day 1.
• Tamoxifen and Desvenlafaxine Succinate Sustained Release
Period 2-Desvenlafaxine SR 100mg on days 1-28 with coadministration of Tamoxifen 40mg on day 7.

Locations

Country	Name	City	State
United States	Pfizer Investigational Site	Miami	Florida
United States	Pfizer Investigational Site	Miami	Florida

Sponsors (1)

Lead Sponsor	Collaborator
Pfizer

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Tamoxifen Area Under the Plasma Concentration-time Profile From Time 0 Extrapolated to Infinite Time (AUCinf) Following Tamoxifen Alone and When Coadministered With DVS SR	Area under the plasma concentration versus time curve (AUC) from time zero (pre-dose) to extrapolated infinite time (0 - 8). It is obtained from AUC (0 - t) plus AUC (t - 8); measured as nanograms multiplied by hours divided by milliliters (ng*hr/mL).	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Primary	Endoxifen (Metabolite) Area Under the Plasma Concentration-time Profile From Time 0 Extrapolated to Infinite Time (AUCinf) Following Endoxifen Alone and When Coadministered With DVS SR	Endoxifen is a metabolite of Tamoxifen. Area under the plasma concentration versus time curve (AUC) from time zero (pre-dose) to extrapolated infinite time (0 - 8). It is obtained from AUC (0 - t) plus AUC (t - 8).	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	Tamoxifen Maximum Observed Concentration (Cmax) Following Tamoxifen Alone and When Coadministered With DVS SR	Cmax measured as nanograms per milliliters (ng/mL).	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	Tamoxifen Time for Cmax (Tmax) Following Tamoxifen Alone and When Coadministered With DVS SR	Time for maximum observed plasma concentration.	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	Tamoxifen Terminal Half-life (t 1/2) Following Tamoxifen Alone and When Coadministered With DVS SR	Terminal half-life is the time measured for the plasma concentration to decrease by one half.	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	Tamoxifen Apparent Clearance (CL/F) Following Tamoxifen Alone and When Coadministered With DVS SR	Drug clearance is a quantitative measure of the rate at which a drug substance is removed from the blood calculated as (Dose/AUCinf); measured as milliliters per minute (mL/min).	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	Tamoxifen Apparent Volume of Distribution (Vz/F) Following Tamoxifen Alone and When Coadministered With DVS SR	Calculated as Dose / (AUCinf * kel); where kel=terminal phase rate constant.	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	Endoxifen (Metabolite) Maximum Observed Concentration (Cmax) Following Tamoxifen Alone and When Coadministered With DVS SR		Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	Endoxifen (Metabolite) Time for Cmax (Tmax) Following Tamoxifen Alone and When Coadministered With DVS SR	Time for maximum observed plasma concentration.	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	Endoxifen (Metabolite) Terminal Half-life (t 1/2) Following Tamoxifen Alone and When Coadministered With DVS SR	Terminal half-life is the time measured for the plasma concentration to decrease by one half.	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	Endoxifen (Metabolite) Apparent Clearance (CL/F) Following Tamoxifen Alone and When Coadministered With DVS SR	Drug clearance is a quantitative measure of the rate at which a drug substance is removed from the blood calculated as (Dose/AUCinf); measured as milliliters per minute (mL/min).	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	Endoxifen (Metabolite) Apparent Volume of Distribution (Vz/F) Following Tamoxifen Alone and When Coadministered With DVS SR		Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	N-desmethyl-tamoxifen (Metabolite) Area Under the Plasma Concentration-time Profile From Time 0 Extrapolated to Infinite Time (AUCinf) Following Tamoxifen Alone and When Coadministered With DVS SR	N-desmethyl-tamoxifen is a metabolite of Tamoxifen. Area under the plasma concentration versus time curve (AUC) from time zero (pre-dose) to extrapolated infinite time (0 - 8). It is obtained from AUC (0 - t) plus AUC (t - 8).	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	N-desmethyl-tamoxifen (Metabolite) Maximum Observed Concentration (Cmax) Following Tamoxifen Alone and When Coadministered With DVS SR		Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	N-desmethyl-tamoxifen (Metabolite) Time for Cmax (Tmax) Following Tamoxifen Alone and When Coadministered With DVS SR	Time for maximum observed plasma concentration.	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	N-desmethyl-tamoxifen (Metabolite) Terminal Half-life (t 1/2) Following Tamoxifen Alone and When Coadministered With DVS SR	Terminal half-life is the time measured for the plasma concentration to decrease by one half.	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	N-desmethyl-tamoxifen (Metabolite) Apparent Clearance (CL/F) Following Tamoxifen Alone and When Coadministered With DVS SR	Drug clearance is a quantitative measure of the rate at which a drug substance is removed from the blood calculated as (Dose/AUCinf); measured as milliliters per minute (mL/min).	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	N-desmethyl-tamoxifen (Metabolite) Apparent Volume of Distribution (Vz/F) Following Tamoxifen Alone and When Coadministered With DVS SR		Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	4-hydroxy-tamoxifen (Metabolite) Area Under the Plasma Concentration-time Profile From Time 0 Extrapolated to Infinite Time (AUCinf) Following Tamoxifen Alone and When Coadministered With DVS SR	4-hydroxy-tamoxifen is a metabolite of Tamoxifen. Area under the plasma concentration versus time curve (AUC) from time zero (pre-dose) to extrapolated infinite time (0 - 8). It is obtained from AUC (0 - t) plus AUC (t - 8).	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	4-hydroxy-tamoxifen (Metabolite) Maximum Observed Concentration (Cmax) Following Tamoxifen Alone and When Coadministered With DVS SR		Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	4-hydroxy-tamoxifen (Metabolite) Time for Cmax (Tmax) Following Tamoxifen Alone and When Coadministered With DVS SR	Time for maximum observed plasma concentration.	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	4-hydroxy-tamoxifen (Metabolite) Terminal Half-life (t 1/2) Following Tamoxifen Alone and When Coadministered With DVS SR	Terminal half-life is the time measured for the plasma concentration to decrease by one half.	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	4-hydroxy-tamoxifen (Metabolite) Apparent Clearance (CL/F) Following Tamoxifen Alone and When Coadministered With DVS SR	Drug clearance is a quantitative measure of the rate at which a drug substance is removed from the blood calculated as (Dose/AUCinf); measured as milliliters per minute (mL/min).	Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	4-hydroxy-tamoxifen (Metabolite) Apparent Volume of Distribution (Vz/F) Following Tamoxifen Alone and When Coadministered With DVS SR		Period 1 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing; Period 2 / Day 1 and Day 7: 0, 0.5, 1, 2, 3, 4, 6, 8, 12 and 16 hours; 0 hour on Day 8, 9, 10, 12, 14, 16, 18, 20, 23, 26 and 29.	No
Secondary	Plasma Tamoxifen Concentration Versus Time Summary: Tamoxifen Alone and When Coadministered With DVS SR	Summary statistics were to be calculated by setting concentration values below the lower limit of quantification (LLQ = 0.250 ng/mL) to zero. Summary statistics were not to be presented if number of observations above lower limit of quantification (NALQ) = 0.	Period 1 / Day 1 and Period 2 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing	No
Secondary	Plasma Endoxifen (Metabolite) Concentration Versus Time Summary: Tamoxifen Alone and When Coadministered With DVS SR	Summary statistics were to be calculated by setting concentration values below the lower limit of quantification (LLQ = 0.100 ng/mL) to zero. Summary statistics were not to be presented if number of observations above lower limit of quantification (NALQ) = 0.	Period 1 / Day 1 and Period 2 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing	No
Secondary	Plasma N-desmethyl-tamoxifen (Metabolite) Concentration Versus Time Summary: Tamoxifen Alone and When Coadministered With DVS SR	Summary statistics were to be calculated by setting concentration values below the lower limit of quantification (LLQ = 0.250 ng/mL) to zero. Summary statistics were not to be presented if number of observations above lower limit of quantification (NALQ) = 0.	Period 1 / Day 1 and Period 2 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing	No
Secondary	Plasma 4-hydroxy-tamoxifen (Metabolite) Concentration Versus Time Summary: Tamoxifen Alone and When Coadministered With DVS SR	Summary statistics were to be calculated by setting concentration values below the lower limit of quantification (LLQ = 0.100 ng/mL) to zero. Summary statistics were not to be presented if number of observations above lower limit of quantification (NALQ) = 0.	Period 1 / Day 1 and Period 2 / Day 1: 0, 0.5, 1, 2, 3, 4, 6, 8, 12,16, 24, 48, 72, 120, 168, 216, 264, 312, 384, 456, and 528 hours after dosing	No

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