PharmacokineticsPhase 4NCT01189500

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

A Phase 4 study testing Tamoxifen and Tamoxifen and Desvenlafaxine Succinate Sustained Release in people with Pharmacokinetics, run by Pfizer at 2 sites in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record

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Trial summary

Who is it for?: Ages 45 years and older, women onlyHealthy volunteers can take part
Conditions the study is for: Pharmacokinetics
What is being tested?: Tamoxifen and Tamoxifen and Desvenlafaxine Succinate Sustained Release
Could I receive a placebo?: No, everyone receives an active treatment
How many people: 30 participants
Where: 2 sitesUnited States
Study dates: Aug 2010to Oct 2010
Phase: Phase 4
Are there results?: Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

Ages 45 years and older
Women only
Healthy volunteers accepted
Adult, Older adult

Who may be able to join

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

Who cannot join

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

Show all 15Show fewer

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

Trial locations and contacts

2 sites in 1 country.

United States2 sites

Pfizer Investigational Site
Miami, Florida, 33126
Pfizer Investigational Site
Miami, Florida, 33134

Other trials in United States

About this study

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

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.

Conditions: Pharmacokinetics
Being tested: Tamoxifen, Tamoxifen and Desvenlafaxine Succinate Sustained Release
Keywords: Pharmacokinetic, safety and tolerability, genetic testing, CYP 2D6

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

TamoxifenDrug
Period 1-Tamoxifen 40mg on study day 1.
Tamoxifen and Desvenlafaxine Succinate Sustained ReleaseDrug
Period 2-Desvenlafaxine SR 100mg on days 1-28 with coadministration of Tamoxifen 40mg on day 7.

Study groups in NCT01189500
Study group	Role	What they receive
Tamoxifen and Desvenlafaxine SR	Experimental	Not described Receives: Drug: Tamoxifen; Drug: Tamoxifen and Desvenlafaxine Succinate Sustained Release

What is being measured

The primary outcome is the main question the study is designed to answer.

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 - ∞). It is obtained from AUC (0 - t) plus AUC (t - ∞); measured as nanograms multiplied by hours divided by milliliters (ng*hr/mL).
Measured: 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.
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 - ∞). It is obtained from AUC (0 - t) plus AUC (t - ∞).
Measured: 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.

Secondary outcomes (26)

Tamoxifen Maximum Observed Concentration (Cmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Cmax measured as nanograms per milliliters (ng/mL).
Measured: 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.
Tamoxifen Time for Cmax (Tmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Time for maximum observed plasma concentration.
Measured: 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.
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.
Measured: 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.
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).
Measured: 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.
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.
Measured: 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.
Endoxifen (Metabolite) Maximum Observed Concentration (Cmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Measured: 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.
Endoxifen (Metabolite) Time for Cmax (Tmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Time for maximum observed plasma concentration.
Measured: 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.
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.
Measured: 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.
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).
Measured: 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.
Endoxifen (Metabolite) Apparent Volume of Distribution (Vz/F) Following Tamoxifen Alone and When Coadministered With DVS SR
Measured: 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.
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 - ∞). It is obtained from AUC (0 - t) plus AUC (t - ∞).
Measured: 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.
N-desmethyl-tamoxifen (Metabolite) Maximum Observed Concentration (Cmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Measured: 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.
N-desmethyl-tamoxifen (Metabolite) Time for Cmax (Tmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Time for maximum observed plasma concentration.
Measured: 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.
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.
Measured: 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.
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).
Measured: 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.
N-desmethyl-tamoxifen (Metabolite) Apparent Volume of Distribution (Vz/F) Following Tamoxifen Alone and When Coadministered With DVS SR
Measured: 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.
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 - ∞). It is obtained from AUC (0 - t) plus AUC (t - ∞).
Measured: 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.
4-hydroxy-tamoxifen (Metabolite) Maximum Observed Concentration (Cmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Measured: 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.
4-hydroxy-tamoxifen (Metabolite) Time for Cmax (Tmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Time for maximum observed plasma concentration.
Measured: 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.
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.
Measured: 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.
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).
Measured: 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.
4-hydroxy-tamoxifen (Metabolite) Apparent Volume of Distribution (Vz/F) Following Tamoxifen Alone and When Coadministered With DVS SR
Measured: 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.
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.
Measured: 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
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.
Measured: 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
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.
Measured: 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
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.
Measured: 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

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

Aug 2010Oct 2010

First posted26 Aug 2010 (estimated)
Study startAug 2010
Primary completionOct 2010
Study completionOct 2010

Resources

Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
Publications (1)Papers the sponsor has linked to this study.
Other trials for PharmacokineticsStudies of the same condition, open and under way.
More trials run by PfizerThe sponsor's other registered studies.
What the trial phases meanHow a treatment moves from first tests in people to approval.

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design

Study type: Interventional
Phase: Phase 4
Primary purpose: Basic science
Allocation: Non-randomised
Intervention model: Single group
Masking: None (open label)
Enrolment: 30 participants (actual)

IDs, dates and publications

ClinicalTrials.gov ID: NCT01189500
Sponsor's protocol ID: B2061027
Other IDs: 3151A1-1206
Status last verified: Nov 2011
First submitted: 25 Aug 2010
Last updated: 7 Nov 2011
Results posted: Yes, on ClinicalTrials.gov
Data monitoring committee: No

Publications

Nichols AI, Lubaczewski S, Liang Y, Matschke K, Braley G, Ramey T. Open-label, 2-period sequential drug interaction study to evaluate the effect of a 100-mg dose of desvenlafaxine on the pharmacokinetics of tamoxifen when coadministered in healthy postmenopausal female subjects. Int J Clin Pharmacol Ther. 2014 Oct;52(10):830-41. doi: 10.5414/CP201958.
PubMed 25138680

Want to know more?

The sponsor has not listed a contact. The official record may have more details.

Talk to your doctor first and take this page with you. Only the study team can confirm whether you can join.

Questions to ask the study team

What is the study trying to find out?
What would I need to do, and how often would I visit?
Could I receive a placebo instead of the treatment?
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Study at a glance

From the registry record, last updated by the sponsor on 7 Nov 2011. Recruitment status is as the sponsor reported it: confirm with the study team.

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
ClinicalTrials.gov ID: NCT01189500
Acronym / sponsor ID: B2061027
Conditions: Pharmacokinetics
Keywords: Pharmacokinetic, safety and tolerability, genetic testing, CYP 2D6
Phase: Phase 4
Study type: Interventional
Recruitment status: Completed
Enrolment: 30 participants (actual)
Lead sponsor: PfizerIndustry (pharma, biotech, devices)
Study start: Aug 2010
Primary completion: Oct 2010 (actual)
Study completion: Oct 2010 (actual)
First posted: 26 Aug 2010 (estimated)
Results: Posted 17 Oct 2011

Clinical summary

The research question as the sponsor registered it. This describes what the study plans to test, not what it found.

Study design

Primary purpose: Basic science
Allocation: Non-randomised
Intervention model: Single group
Masking: None (open label)
Number of arms: 1

Arm	Type	Receives
Tamoxifen and Desvenlafaxine SR	Experimental	Drug: Tamoxifen, Drug: Tamoxifen and Desvenlafaxine Succinate Sustained Release

Who may qualify

Ages: 45 years and older
Sex: Female only
Healthy volunteers: Accepted
Age groups: Adult, Older adult

Key inclusion criteria (5 listed)

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

Key exclusion criteria (15 listed)

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

Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.

Interventions

Intervention	Type	Arms
TamoxifenPeriod 1-Tamoxifen 40mg on study day 1.	Drug	Tamoxifen and Desvenlafaxine SR
Tamoxifen and Desvenlafaxine Succinate Sustained ReleasePeriod 2-Desvenlafaxine SR 100mg on days 1-28 with coadministration of Tamoxifen 40mg on day 7.	Drug	Tamoxifen and Desvenlafaxine SR

Primary outcome

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
Time frame: 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.
Area under the plasma concentration versus time curve (AUC) from time zero (pre-dose) to extrapolated infinite time (0 - ∞). It is obtained from AUC (0 - t) plus AUC (t - ∞); measured as nanograms multiplied by hours divided by milliliters (ng*hr/mL).
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
Time frame: 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.
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 - ∞). It is obtained from AUC (0 - t) plus AUC (t - ∞).

26 secondary outcomes

Tamoxifen Maximum Observed Concentration (Cmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
Tamoxifen Time for Cmax (Tmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
Tamoxifen Terminal Half-life (t 1/2) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
Tamoxifen Apparent Clearance (CL/F) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
Tamoxifen Apparent Volume of Distribution (Vz/F) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
Endoxifen (Metabolite) Maximum Observed Concentration (Cmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
Endoxifen (Metabolite) Time for Cmax (Tmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
Endoxifen (Metabolite) Terminal Half-life (t 1/2) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
Endoxifen (Metabolite) Apparent Clearance (CL/F) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
Endoxifen (Metabolite) Apparent Volume of Distribution (Vz/F) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
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
Time frame: 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.
N-desmethyl-tamoxifen (Metabolite) Maximum Observed Concentration (Cmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
N-desmethyl-tamoxifen (Metabolite) Time for Cmax (Tmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
N-desmethyl-tamoxifen (Metabolite) Terminal Half-life (t 1/2) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
N-desmethyl-tamoxifen (Metabolite) Apparent Clearance (CL/F) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
N-desmethyl-tamoxifen (Metabolite) Apparent Volume of Distribution (Vz/F) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
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
Time frame: 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.
4-hydroxy-tamoxifen (Metabolite) Maximum Observed Concentration (Cmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
4-hydroxy-tamoxifen (Metabolite) Time for Cmax (Tmax) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
4-hydroxy-tamoxifen (Metabolite) Terminal Half-life (t 1/2) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
4-hydroxy-tamoxifen (Metabolite) Apparent Clearance (CL/F) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
4-hydroxy-tamoxifen (Metabolite) Apparent Volume of Distribution (Vz/F) Following Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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.
Plasma Tamoxifen Concentration Versus Time Summary: Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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
Plasma Endoxifen (Metabolite) Concentration Versus Time Summary: Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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
Plasma N-desmethyl-tamoxifen (Metabolite) Concentration Versus Time Summary: Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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
Plasma 4-hydroxy-tamoxifen (Metabolite) Concentration Versus Time Summary: Tamoxifen Alone and When Coadministered With DVS SR
Time frame: 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

Results and safety

Results posted to the registry on 17 Oct 2011, as reported by the sponsor. Figures are copied from the record, not re-analysed. Full results on ClinicalTrials.gov.

Participant flow

Group	Started	Completed
Tamoxifen 40 mg, Tamoxifen 40 mg + DVS SR 100 mg	30	29

Primary outcome: 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

Time frame: 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.. Geometric mean (Standard Deviation). Unit: ng*hr/mL

Measure	Tamoxifen 40 mg (Period 1) n = 26	Tamoxifen 40 mg + DVS SR 100 mg (Period 2) n = 26
Value	5751 (1540.1)	5888 (1905.5)

Tamoxifen 40 mg (Period 1) vs Tamoxifen 40 mg + DVS SR 100 mg (Period 2): ratio of adjusted means: 100.69 (90% CI 96.70 to 104.85)

Population analysed: Pharmacokinetic (PK) parameter analysis population: all participants randomized and treated who had at least 1 of the PK parameters of primary interest in at least 1 treatment period. N=number of participants contributing to the mean.

Primary outcome: 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

Measure	Tamoxifen 40 mg (Period 1) n = 4	Tamoxifen 40 mg + DVS SR 100 mg (Period 2) n = 4
Value	677.7 (200.42)	505.6 (220.87)

Population analysed: PK parameter analysis population. N=number of participants contributing to the mean.

26 secondary outcomes are reported in the full results.

Adverse events

Time frame: Baseline up to Day 36 (follow-up telephone visit). Other adverse events reported at 0% frequency or more

Group	Serious adverse events	Other adverse events	Deaths
Tamoxifen 40 mg (Period 1)	1 of 30 (3.3%)	11 of 30 (36.7%)	Not reported
DVS SR 100 mg (Period 2)	0 of 29 (0%)	17 of 29 (58.6%)	Not reported
Tamoxifen 40 mg + DVS SR 100 mg (Period 2)	0 of 29 (0%)	24 of 29 (82.8%)	Not reported

Loading the posted results from ClinicalTrials.gov…

Research links

Official record on ClinicalTrials.govLast updated by the sponsor 7 Nov 2011.
Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
Derived from this study: PubMed 25138680Nichols AI, Lubaczewski S, Liang Y, Matschke K, Braley G, Ramey T. Open-label, 2-period sequential drug interaction study to evaluate the effect of a 100-mg dose of desvenlafaxine on the pharmacokinetics of tamoxifen when coadministered in healthy postmenopausal female subjects. Int J Clin Pharmacol Ther. 2014 Oct;52(10):830-41. doi: 10.5414/CP201958.

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Referral and contact

AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.

Pfizer CT.gov Call Center study director

Pfizer

2 sites in 1 country: see every site and its status.

Questions about this trial

What is this clinical trial studying?

A Phase 4 study testing Tamoxifen and Tamoxifen and Desvenlafaxine Succinate Sustained Release in people with Pharmacokinetics, run by Pfizer at 2 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 5 inclusion and 15 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 7 Nov 2011. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 2 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 17 Oct 2011). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

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 (time frame: 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.). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT01189500, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 7 Nov 2011.