Study Comparing Bioavailability of 3 New Formulations of Premarin/MPA With Premarin/MPA (PREMPRO) Reference Formulation

An Open-Label, Single-Dose, Randomized, 4-Period, Crossover, Bioavailability Study Among 3 New Formulations of Premarin 0.625 mg/Medroxyprogesterone Acetate (Mpa) 2.5 mg Compared With a Reference Formulation of Premarin/Mpa (Prempro) 0.625 mg/2.5 mg in Healthy Postmenopausal Women

Status

Completed

Phases

Phase 1

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT00401219

Enrollment

Unknown

Registered

2006-11-20

Start date

2006-11-30

Completion date

2007-02-28

Last updated

2007-12-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Estrogen Replacement Therapy

Brief summary

This study will compare the bioavailabity of three new investigational combination formulations of Premarin and medroxyprogesterone acetate (MPA) with a currently marketed formulation of Premarin and MPA, Prempro™. Prempro™ is indicated for use after menopause in women with a uterus to reduce moderate to severe hot flashes; to treat moderate to severe dryness, itching, and burning, in and around the vagina; and to help reduce your chances of getting osteoporosis (thin weak bones). The purpose of this study is to determine if these new formulations of Premarin/MPA provide the same levels of estrogen and MPA in the blood as Prempro in healthy postmenopausal women.

Interventions

DRUGconjugated estrogens/progestin (MPA)

Study design

Allocation

RANDOMIZED

Intervention model

CROSSOVER

Primary purpose

TREATMENT

Masking

NONE

Eligibility

Sex/Gender

FEMALE

Age

35 Years to 70 Years

Healthy volunteers

Yes

Inclusion criteria

* Healthy, postmenopausal women ages 35 to 70 years, inclusive. * Naturally postmenopausal women must not have had a menstrual period for at least six months, but less than 12 months, as confirmed by a blood test; or for at least 12 months with no blood hormone test confirmation. Naturally postmenopausal women must not have had a menstrual period since the age of 54. Surgically menopausal women must have undergone bilateral oophorectomy (removal of both ovaries) at least 6 months prior to the start of the study, and the surgical report may be requested to confirm the surgery date and that the surgery was not due to a cancerous condition. * Nonsmoker or smoker of fewer than 10 cigarettes per day as determined by history. Must be able to abstain from smoking during the inpatient stay.

Design outcomes

Primary

Measure	Time frame
Pharmacokinetic blood samples for unconjugated and total (unconjugated plus conjugated) estrogens and MPA will be obtained. The following pharmacokinetic parameters will be determined: Cmax, Tmax, t½, AUC0-T, AUC0-¥.	—

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026