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Bazedoxifene/Conjugated Estrogen

Phase 3

Endometrial Hyperplasia | Small molecule | Oncology |Pfizer, Inc.|Last Updated: Dec 20, 2013

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials2
Total Enrollment4,627

FDA Designations

No designations recorded

Clinical trial landscape

Bazedoxifene/Conjugated Estrogen · 4 trials · 4 indications

Phase 3 4
NCT00234819Study Evaluating Bazedoxifene/Conjugated Estrogen Combinations in Symptoms Associated With MenopauseVasomotor Symptoms Associated With Menopause
COMPLETED325 Analytics
NCT00238732Study Evaluating Bazedoxifene/Conjugated Estrogen Combinations in Vasomotor Symptoms Associated With MenopauseVaginal Atrophy
COMPLETED650 Analytics
NCT00242710Study Evaluating Bazedoxifene/Conjugated Estrogens Combinations In Postmenopausal WomenEndometrial Hyperplasia
COMPLETED1,083 Analytics
NCT00675688Study Evaluating Safety and Efficacy of Bazedoxifene/Conjugated Estrogens Combinations in Postmenopausal WomenEndometrial Hyperplasia
COMPLETED3,544 Analytics
PHASE3COMPLETED
Study Evaluating Bazedoxifene/Conjugated Estrogen Combinations in Symptoms Associated With Menopause
Vasomotor Symptoms Associated With MenopauseUnlock trial analytics
PHASE3COMPLETED
Study Evaluating Bazedoxifene/Conjugated Estrogen Combinations in Vasomotor Symptoms Associated With Menopause
Vaginal AtrophyUnlock trial analytics
PHASE3COMPLETED
Study Evaluating Bazedoxifene/Conjugated Estrogens Combinations In Postmenopausal Women
Endometrial HyperplasiaUnlock trial analytics
PHASE3COMPLETED
Study Evaluating Safety and Efficacy of Bazedoxifene/Conjugated Estrogens Combinations in Postmenopausal Women
Endometrial HyperplasiaUnlock trial analytics

Study Endpoints

Primary Endpoints

Number and severity of moderate and severe hot flashes at week 4 and at week 12, as reported daily on subject diary cards.
Superficial cells (by cervical/vaginal cytologic smear) at screening, and weeks 4 and 12.
Parabasal cells (by cervical/vaginal cytologic smear) at screening, and weeks 4 and 12.
Percentage of Participants With Hyperplasia at Screening
Screening

Endometrial hyperplasia was assessed by endometrial biopsies. All endometrial biopsies were read centrally by 2 primary pathologists. Participants were considered to have a diagnosis of hyperplasia if both pathologists read hyperplasia (simple hyperplasia with or without atypia or complex hyperplasia with or without atypia). If the both pathologists disagreed on the presence of hyperplasia, a third pathologist was consulted, with the final diagnosis determined by the majority opinion.

Percentage of Participants With Hyperplasia at Month 12
Month 12

Endometrial hyperplasia was assessed by endometrial biopsies. All endometrial biopsies were read centrally by 2 primary pathologists. Participants were considered to have a diagnosis of hyperplasia if both pathologists read hyperplasia (simple hyperplasia with or without atypia or complex hyperplasia with or without atypia). If the both pathologists disagreed on the presence of hyperplasia, a third pathologist was consulted, with the final diagnosis determined by the majority opinion.

Bone Mineral Density (BMD) of Lumbar Spine at Screening
Screening

BMD measurements of the anteroposterior lumbar spine were acquired by dual-energy x-ray absorptiometry (DXA), twice during screening in participants who entered the osteoporosis substudy. The second scan was to be performed on the same day as the first; however, the participant was to be removed completely from the table after the first scan and repositioned for the second scan. An average of the 2 readings was reported.

Percent Change From Baseline in Bone Mineral Density (BMD) of Lumbar Spine at Month 12
Baseline, Month 12

BMD measurements of the anteroposterior lumbar spine were acquired by DXA, twice at Month 12 in participants who entered the osteoporosis substudy. The second scan was to be performed on the same day as the first; however, the participant was to be removed completely from the table after the first scan and repositioned for the second scan. An average of the 2 readings was reported.

Bone Mineral Density (BMD) of Total Hip at Screening
Screening

BMD measurements of the total hip were acquired by DXA, twice during screening in participants who entered the osteoporosis substudy. The second scan was to be performed on the same day as the first; however, the participant was to be removed completely from the table after the first scan and repositioned for the second scan. An average of the 2 readings was reported.

Percent Change From Baseline in Bone Mineral Density (BMD) of Total Hip at Month 12
Baseline, Month 12

BMD measurements of the total hip were acquired by DXA, twice at Month 12 in participants who entered the osteoporosis substudy. The second scan was to be performed on the same day as the first; however, the participant was to be removed completely from the table after the first scan and repositioned for the second scan. An average of the 2 readings was reported.

To evaluate the effects of Bazedoxifene/Conjugate Estrogens (CE) combinations on the incidence of endometrial hyperplasia in postmenopausal women.
one year

Secondary Endpoints

Breast pain throughout the 12 week study, as reported daily on subject diary cards. Sleep scales and sleep quantity at week 4 and week 12, as indicated on a subject-completed questionnaire.
Vaginal pH at screening, and weeks 4 and 12.
Most bothersome moderate or severe vulvar/vaginal atrophy sympton at screening, and weeks 4 and 12.
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
1EXPERIMENTALBZA 20mg/CE 0.625
Arm 2EXPERIMENTALBZA 20mg/CE 0.45
Arm 3ACTIVE_COMPARATORCE 0.45mg/MPA1.5mg
Arm 4PLACEBO_COMPARATORPlacebo
AEXPERIMENTAL -
BACTIVE_COMPARATOR -
CPLACEBO_COMPARATOR -

Interventions

NameTypeDescription
Bazedoxifene/Conjugated EstrogenDRUG -
CE 0.45 mg/MPA 1.5mgDRUGSubjects will take 1 capsule orally, once daily, at approximately the same time each day continuously for the duration of the study.
PlaceboOTHERSubjects will take 1 capsule orally, once daily, at approximately the same time each day continuously for the duration of the study.
Bazedoxifene/Conjugate Estrogens (CE)DRUG -
RaloxifeneDRUG -
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Eligibility Criteria

Age Range40 Years to 64 Years
SexFEMALE
Healthy VolunteersNo
Study Sites7

Inclusion Criteria: * Generally healthy, postmenopausal women, aged 40 to 64, with last natural menstrual period completed at lease 6 months ago * Intact uterus * Seeking treatment for hot flushes and experiencing 7 moderate to severe hot flushes per day or 50 per week Exclusion Criteria: * Histo...

Countries:United States
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Frequently asked questions about Bazedoxifene/Conjugated Estrogen

What is Bazedoxifene used for?

Bazedoxifene is an investigational small molecule being studied for conditions related to menopause, including postmenopausal osteoporosis, vaginal atrophy, endometrial hyperplasia, and vasomotor symptoms associated with menopause. It is being developed by Pfizer, Inc. (PFE) and is currently in Phase 3 clinical development.

Who makes Bazedoxifene?

Bazedoxifene is being developed by Pfizer, Inc., which trades under the ticker symbol PFE. The drug is an investigational small molecule in Phase 3 clinical development for multiple menopause-related conditions, including osteoporosis and vasomotor symptoms.

What phase is Bazedoxifene in?

Bazedoxifene is in Phase 3 clinical development. It is an investigational drug and has not been approved by regulatory authorities. Pfizer, Inc. (PFE) is the developer, and the drug is being studied for postmenopausal osteoporosis, vaginal atrophy, and vasomotor symptoms associated with menopause.

What clinical trials has Bazedoxifene been in?

Bazedoxifene has completed three clinical trials. One Phase 3 trial (NCT00238732) evaluated Bazedoxifene with conjugated estrogens for vasomotor symptoms and vaginal atrophy in 650 women. A Phase 2 trial (NCT00238745) studied dose-response in 375 Japanese patients with postmenopausal osteoporosis. Two Phase 1 trials (NCT00479778, NCT00706225) assessed pharmacokinetics and drug interactions in healthy postmenopausal women.

Is Bazedoxifene the same as a combination therapy?

Bazedoxifene has been studied in combination with conjugated estrogens. Clinical trials such as NCT00238732 evaluated Bazedoxifene with conjugated estrogen combinations for vasomotor symptoms and vaginal atrophy, and NCT00479778 examined the pharmacokinetic profile of Bazedoxifene in two Bazedoxifene and conjugated estrogen forms.

What is the mechanism of action of Bazedoxifene?

Bazedoxifene is a small molecule being developed for menopause-related conditions. Its specific molecular target has not been disclosed in the available clinical trial information. The drug is being studied for its effects on postmenopausal osteoporosis, vaginal atrophy, and vasomotor symptoms.