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Effexor

Phase 4FDA approved

Depression | Small molecule | Psychiatry |Pfizer, Inc.|Trials Updated: Jan 28, 2021

Effexor development status

FDA approval on record May 2, 2001
Approval holderWyeth Pharms Inc
ApplicationNDA020151
Highest phase Phase 4 (NCT00474708)
Phase scored for PFEPhase 3
Registered trials 12 across 9 sponsors since Jul 2005

Effexor target and mechanism

ModalitySmall molecule

Also known as Effexor XR, venlafaxine

Success Probability

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Market & Valuation

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Trial Design

Double-BlindUNCONTROLLED
Total Trials10
Total Enrollment3,177

FDA Designations

No designations recorded

Effexor clinical trials

Effexor · 10 trials · 6 indications

Phase 3 10
NCT01485887Venlafaxine ER Long-Term Extension Study for Major Depressive Disorder (MDD)Major Depressive Disorder
COMPLETED50 Analytics
NCT01441440Venlafaxine ER Phase 3 Study for Major Depressive Disorder (MDD)Major Depressive Disorder
COMPLETED538 Analytics
NCT00151450Comparison of Pregabalin Versus Venlafaxine XR and Placebo in the Treatment of Generalized Anxiety DisorderAnxiety
COMPLETED390 Analytics
NCT00195598Study Comparing Venlafaxine vs. Paroxetine in Panic DisorderPanic Disorders
COMPLETED70 Analytics
NCT00225524Study Evaluating Long-Term Safety of Effexor XR in Patients With Major Depression.Depression
COMPLETED150 Analytics
NCT00225511Study Evaluating Effexor XR for Major Depression.Depression
COMPLETED590 Analytics
NCT00225485Study Evaluating Effexor XR in Elderly Patients With Major Depression.Depression
COMPLETED100 Analytics
NCT00044772Study Evaluating Venlafaxine ER in Patients With Panic DisorderPanic Disorder
COMPLETED653 Analytics
NCT00038896Study Evaluating Venlafaxine ER in Adults With Panic DisorderPanic Disorder
COMPLETED343 Analytics
NCT00238719Study Evaluating Venlafaxine ER in Children and Adolescents With Social Anxiety DisorderSocial Anxiety Disorder
COMPLETED293 Analytics
PHASE3COMPLETED
Venlafaxine ER Long-Term Extension Study for Major Depressive Disorder (MDD)
Major Depressive DisorderUnlock trial analytics
PHASE3COMPLETED
Venlafaxine ER Phase 3 Study for Major Depressive Disorder (MDD)
Major Depressive DisorderUnlock trial analytics
PHASE3COMPLETED
Comparison of Pregabalin Versus Venlafaxine XR and Placebo in the Treatment of Generalized Anxiety Disorder
AnxietyUnlock trial analytics
PHASE3COMPLETED
Study Comparing Venlafaxine vs. Paroxetine in Panic Disorder
Panic DisordersUnlock trial analytics
PHASE3COMPLETED
Study Evaluating Long-Term Safety of Effexor XR in Patients With Major Depression.
DepressionUnlock trial analytics
PHASE3COMPLETED
Study Evaluating Effexor XR for Major Depression.
DepressionUnlock trial analytics
PHASE3COMPLETED
Study Evaluating Effexor XR in Elderly Patients With Major Depression.
DepressionUnlock trial analytics
PHASE3COMPLETED
Study Evaluating Venlafaxine ER in Patients With Panic Disorder
Panic DisorderUnlock trial analytics
PHASE3COMPLETED
Study Evaluating Venlafaxine ER in Adults With Panic Disorder
Panic DisorderUnlock trial analytics
PHASE3COMPLETED
Study Evaluating Venlafaxine ER in Children and Adolescents With Social Anxiety Disorder
Social Anxiety DisorderUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)
Baseline (Week 8 of the preceding double-blind study B2411263 [NCT01441440]) up to 10 months

Any untoward medical occurrence in a participant who received study drug was considered an adverse event (AE), without regard to possibility of causal relationship. Treatment-emergent adverse events: those which occurred or worsened after baseline. An AE resulting in any of the following outcomes, was considered to be a serious adverse event: death; lifethreatening; initial or prolonged inpatient hospitalization; persistent or significant disability/incapacity; congenital anomaly/birth defect.

Number of Participants With Clinical Significant Vital Changes
Baseline (Week 8 of the preceding double-blind study B2411263 [NCT01441440]) up to 10 months

Clinical significant changes were pre-defined for systolic blood pressure (SBP), diastolic blood pressure (DBP) , and pulse rate (PR). An average value of 3 measurements in each visit meeting the following criteria for 3 consecutive visits was determined as clinical siginificant changes: DBP \>= 90 mmHg with change from the baseline \>= 10 mmHg; SBP \>= 140 mmHg with change from the baseline \>= 20 mmHg; PR \>= 100 bpm with change from the baseline \>= 15 bpm.

Number of Participants With Clinical Significant Laboratory Tests Changes
Baseline (Week 8 of the preceding double-blind study B2411263 [NCT01441440]) up to 10 months

Clinical significant changes were pre-defined for each laboratory test based on the criteria: Red Blood Cell Count \<0.8 x lower limit normal (LLN); Lymphocytes (%) \<0.8 x LLN; Eosinophils (%) \>1.2 x upper limit normal (ULN); Total Bilirubin \>1.5 x ULN; Alanine Aminotransferase (ALT) \>3.0 x ULN; Gamma glutamyl transferase (GGT) \>3.0 x ULN; Uric Acid \>1.2 x ULN; Cholesterol \>1.3 x ULN; Low density lipoprotein (LDL) cholesterol \>1.2 x ULN; Triglycerides \>1.3 x ULN; Glucose \>1.5 x ULN; Urine Glucose \[qualitative (Qual)\] \>=1; Urine Protein (Qual) \>=1; Urine Blood/Hemoglobin (Hgb) (Qual) \>=1.

Number of Participants With Clinical Significant Electrocardiogram (ECG) Changes
Baseline (Week 8 of the preceding double-blind study B2411263 [NCT01441440]) up to 10 months

Clinically significant ECG findings included: corrected QT (QTc), QT interval corrected using the Bazett's formula (QTcB), and QT interval corrected using the Fridericia formula (QTcF)\> 450 millisecond (ms), \>480 ms, and \>500 ms respsctively, change from baseline in QTc, QTcB, and QTcF \>= 30 ms, and \>= 60 ms, respectively.

Number of Participants With no at Baseline and Yes at Any Post Baseline for Columbia Suicide-Severity Rating Scale (C-SSRS) According to the Columbia Classification Algorithm of Suicide Assessment (C-CASA) Categories
Baseline (Week 8 of the preceding double-blind study B2411263 [NCT01441440]) up to 10 months

C-SSRS is a participant rated questionnaire to assess suicidal ideation, suicidal behavior, actual attempts (yes or no responses), and intensity of ideation (rated 1=low severity to 5=high severity). Yes/No responses are mapped to Columbia Classification Algorithm of Suicide Assessment (C-CASA) categories: Completed suicide, suicide attempt, preparatory acts toward imminent suicidal behavior, suicidal ideation, and self-injurious behavior, or no suicidal intent. A participant could have a yes or no response in more than one category.

Change From Baseline in 17-item Hamilton Raing Scale for Depression (HAM-D17) Total Score at Week 8 or Early Termination
Baseline, Week 8 or Early termination

HAM-D17 is a standardized, clinician-administered rating scale that assesses 17 items characteristically associated with major depression (symptoms such as depressed mood, work and activities, sleep, suicide, psychomotor agitation/retardation, appetite, sexual interest, anxiety, and somatic symptoms). The items of the HAM-D17 are rated on a scale of 0 to 2 or 0 to 4, and the total score ranges from 0 to 52. Higher scores indicate more severe symptoms. Change from baseline: mean score at Week 8 or early termination minus mean score at baseline.

Evaluation of the efficacy of pregabalin and Venlafaxine XR in the treatment of generalized anxiety disorder.
To evaluate the improvement of social function following therapy with Venlafaxine extended release (XR)in the Treatment of Panic Disorder in comparison to Paroxetine.
Incidence of adverse events
Response rate of HAM-D17 (Hamilton Rating Scale for Depression) at the final-on-therapy.
Response rate of HAM-D17 (Hamilton Rating Scale for Depression) at the final-on-therapy
Final on therapy Social Anxiety Scale-Adolescents and Children (SAS-AC) total score.

Secondary Endpoints

Change From Baseline in 17-item Hamilton Rating Scale for Depression (HAM-D17) at Each Post Baseline Time Point
Baseline (Week 8 of the preceding double-blind study B2411263 [NCT01441440]), Weeks 1, 2, 3, 4, 6, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44
Change From Baseline in Clinical Global Impression - Severity (CGI-S) at Each Post Baseline Time Point
Baseline (Week 8 of the preceding double-blind study B2411263 [NCT01441440]), Weeks 1, 2, 3, 4, 6, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44
Mean Clinical Global Impression - Improvement (CGI-I) Score at Each Post Baseline Time Point
Weeks 1, 2, 3, 4, 6, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Venlafaxine EREXPERIMENTAL -
venlafaxine ER 75 mg/day (fixed dose)EXPERIMENTAL -
venlafaxine ER 75 mg/day to 225 mg/day (flexible dose)EXPERIMENTAL -
PlaceboPLACEBO_COMPARATOR -

Interventions

NameTypeDescription
Venlafaxine ERDRUGTreatment phase: 10 months (75-225 mg/day), oral administration Tapering phase: 1-3 weeks (stepwise dose reduction: 150-37.5 mg/day), oral administration
venlafaxine ER 75 mg/day (fixed dose)DRUGTreatment phase: 8 weeks (37.5 mg/day for 1st week and 75 mg/day for 7 weeks), oral administration Tapering phase: 2 weeks (37.5 mg/day for the 1st week and placebo for the 2nd week), oral administration
venlafaxine ER 75 mg/day to 225 mg/day (flexible dose)DRUGTreatment phase: 8 weeks (37.5 mg/day for the 1st week, 75 mg/day for the 2nd weeks, 75-150 mg for the 3rd week, 75-225 mg/day for the rest of 5 weeks), oral administration Tapering phase: 2 weeks (75/37.5 mg/day for the 1st week and 37.5 mg/day/placebo for the 2nd week), oral administration
PlaceboDRUGTreatment phase: 8 weeks (placebo), oral administration Tapering phase: 2 weeks (placebo), oral administration
PregabalinDRUG -
Venlafaxine XRDRUG -
VENLAFAXINEDRUG -
ParoxetineDRUG -
Effexor XRDRUG -
MilnacipranDRUG -
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Eligibility Criteria

Age Range20 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites25

Inclusion Criteria: * Outpatients who have completed 8 weeks double-blind study (B2411263), without major protocol violations or tolerability concerns in the opinion of the investigator. Exclusion Criteria: * Clinically important abnormalities on baseline (Week 8 of the double-blind study) physic...

Countries:JapanBelgiumCanadaFranceIrelandItalyNetherlandsSpainSwedenBrazil
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Frequently asked questions about Effexor

What is Effexor used for?

Effexor is used for the treatment of depression, including major depressive disorder. It is a small molecule psychiatry therapy developed by Pfizer, Inc. Clinical development has focused on major depression, with studies conducted in adult and elderly patient populations.

Who makes Effexor?

Effexor is developed and manufactured by Pfizer, Inc., which trades on the New York Stock Exchange under the ticker PFE. Pfizer is the company behind the Effexor and Effexor XR brands.

Is Effexor the same as Effexor XR?

Yes, Effexor XR is an alternative name for Effexor. The extended-release formulation is referred to as Effexor XR, and the two names refer to the same Pfizer antidepressant product. People searching for either name are looking at the same drug.

What phase is Effexor in?

Effexor has been studied in Phase 3 clinical development for depression. Three Phase 3 trials have been completed, and none are currently active. The program enrolled a total of 840 patients across those completed studies.

What clinical trials is Effexor in?

Effexor has been evaluated in three completed Phase 3 trials: NCT00225511, which studied Effexor XR for major depression in 590 patients; NCT00225524, a long-term safety study in 150 patients; and NCT00225485, which studied Effexor XR in elderly patients with major depression in 100 patients. All three were conducted in Japan.

Who was eligible for the Effexor depression trials?

The Effexor Phase 3 depression trials enrolled adults aged 20 years and older, with one study restricted to elderly patients aged 65 years and older. All three trials were conducted in Japan, enrolled both sexes, and did not include healthy volunteers.