HRT: A Pharmacokinetic Evaluation of Bioidentical Compounded Estrogen Cream and Natural Progesterone

Sponsor

Mayo Clinic (Other)

Overall Status

Completed

CT.gov ID

NCT00864214

Collaborator

(none)

Enrollment

Location

Arms

Duration (Months)

1.8

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

Bioidentical compounded hormone therapy (BCHT) is considered a 'safer' option to the conventional hormones (HT) by its proponents. However, there is limited research data to support their claims. Our group at the Women's Health Clinic, in collaboration with the Departments of Endocrinology, Complementary Medicine and Laboratory Medicine, is interested in developing a line of research to test the safety and efficacy of BCHT. In the present study, we aim to find the dose of BCHT that is bioequivalent to conventional HT, in a randomized, blinded, four-arm, phase I clinical trial. We will estimate the levels of estrone (E1), estradiol (E2) and estriol (E3) at baseline and at steady state with two-weeks of administration of three commonly used doses of bioidentical compounded estrogen cream (Biest) and a standard dose conventional estrogen patch (Vivelle-Dot). E1, E2, and E3 values will be summarized using point estimates and 95% confidence intervals. Two-sample t-test will be used to compare each Biest group to the Vivelle-Dot group. Healthy postmenopausal women, with no contraindications for hormone use, who are able to fully understand and participate in the trial, will be enrolled. We will utilize the resources of Mayo CRU to conduct this study.

Condition or Disease	Intervention/Treatment	Phase
Menopause	Drug: bioidentical hormone (Biest) Drug: bioidentical hormone (Biest) Drug: bioidentical hormone (Biest) Drug: bioidentical hormone (Vivelle-Dot)	Phase 1

Detailed Description

This study is designed as a Phase I, blinded, randomized, four-arm clinical trial. Participants will be randomized to one of the four interventions: Biest transdermal cream 2.0 mg/0.5 g daily, Biest 2.5 mg/0.5 g daily, Biest 3.0 mg/0.5 g daily or Vivelle-Dot patch 0.05 mg/24 hours changed biweekly. Serum levels of E1, E2, E3 and progesterone will be obtained at baseline before starting the intervention and then multiple times on days 1 15 and 16 of study, as outlined in the table below (Table 3.1). The peak and steady state concentrations of E1, E2 and E3, along with time to reach the peak levels, and area under the curve will be calculated. Baseline and steady state levels of progesterone will also be compared between the compounded and micronized progesterone groups. If there are abnormalities in estrogen levels or symptoms suggesting such, a vaginal ultrasound would be done to exclude possible ovarian activity as a source.

Study Design

Study Type:

Interventional

Actual Enrollment :

40 participants

Allocation:

Randomized

Intervention Model:

Parallel Assignment

Masking:

Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)

Primary Purpose:

Treatment

Official Title:

A Pharmacokinetic Evaluation of Bioidentical Compounded Estrogen Cream and Natural Progesterone

Study Start Date :

Jun 1, 2008

Actual Primary Completion Date :

Dec 1, 2009

Actual Study Completion Date :

Apr 1, 2010

Arms and Interventions

Arm	Intervention/Treatment
Experimental: 1 Estrogen is the Biest 2.0 mg bioidentical cream; the placebo is the transdermal patch; the progesterone is compounded progesterone-100 mg	Drug: bioidentical hormone (Biest) Estrogen is the Biest 2.0 mg bioidentical cream; the placebo is the transdermal patch; the progesterone is compounded progesterone-100 mg
Experimental: 2 Estrogen is the Biest 2.5 mg bioidentical cream; the placebo is the transdermal patch; the progesterone is compounded progesterone-100 mg	Drug: bioidentical hormone (Biest) Estrogen is the Biest 2.5 mg bioidentical cream; the placebo is the transdermal patch; the progesterone is compounded progesterone-100 mg
Experimental: 3 Estrogen is the Biest 3.0 mg bioidentical cream; the placebo is the transdermal patch; the progesterone is compounded progesterone-100 mg	Drug: bioidentical hormone (Biest) Estrogen is the Biest 3.0 mg bioidentical cream; the placebo is the transdermal patch; the progesterone is compounded progesterone-100 mg
Experimental: 4 Estrogen is the Vivelle-Dot patch 0.05 mg; the placebo is the transdermal cream; the progesterone is micronized progesterone-100 mg	Drug: bioidentical hormone (Vivelle-Dot) Estrogen is the Vivelle-Dot patch 0.05 mg; the placebo is the transdermal cream; the progesterone is micronized progesterone-100 mg

Outcome Measures

Primary Outcome Measures

To measure estrone, estradiol and estriol levels at baseline and after achieving a steady state with 15-days of administration of three commonly used doses of bioidentical compounded estrogen cream and a standard dose conventional estrogen patch. [Day 1 and Day 15]
To measure the progesterone levels at baseline and after achieving a steady state with 15-days of administration of 100 mg/day of two different oral progesterone formulations. [Day 1 and Day 15]

Secondary Outcome Measures

To assess the feasibility of conducting a clinical trial randomizing patients to daily estradiol-estriol transdermal cream or biweekly estradiol patch for 15 days in 40 healthy postmenopausal women. [Day 1 and Day 15]
To assess the tolerability of use of daily estradiol-estriol transdermal cream and biweekly estradiol patch for 15 days in 40 healthy postmenopausal women in a randomized clinical trial. [Day 1 and Day 15]
To test if genetic variation in SULT1A1 copy number and single nucleotide polymorphisms (SNPs) influences estrogen pharmacokinetics in 40 healthy postmenopausal women receiving exogenous estrogen therapy. [Day 1]

Eligibility Criteria

Criteria

Ages Eligible for Study:

40 Years to 60 Years

Sexes Eligible for Study:

Female

Accepts Healthy Volunteers:

Yes

Inclusion Criteria:

Women 40-60 years old;
Postmenopausal status, as documented by absence of periods for ≥ 1 year or amenorrhea for ≥ 6 months along with FSH ≥ 40 IU/L;
Surgical menopause;
History of a normal mammogram within the last 11 months;
Normal screening labs (within 20% of upper limit of lab normal);
Able to understand and sign informed consent; and
Able and willing to be in a monitored CRU setting and provide blood samples as requested.

Exclusion Criteria:

Contraindications to the use of hormones because of personal history of coronary artery disease, stroke, breast cancer, DVT/PE, active liver or gall bladder disease, hormone dependent migraine headaches, endometrial, ovarian or other hormone dependent cancers;
Medical conditions increasing the risk of complications from hormone replacement such as uncontrolled hypertension (>160/100 mmHg), smoking, diabetes and lupus;
Current use of estrogen, progesterone or testosterone;Depending on the drug, it could be 7 days to 6 months.
Current use of isoflavone containing products;
Current use of protein binding medications like rifampin, warfarin, antiepileptic drugs (effect on estrogen bioavailability);
Family history of premenopausal breast cancer in a first degree relative, two or more premenopausal breast cancers in second degree relatives, male breast cancer, ovarian cancer in two or more relatives and; and
Women with alcohol or substance abuse or dementia (compliance issues).
Women who are more than ten years from their last menstrual period (unfavorable risk : benefit ratio)
Women with peanut allergy (Prometrium has peanut oil)
Women who are found to have premenopausal estrogen levels, as confirmed by a baseline Estradiol level of >35 pg/ml and vaginal ultrasound suggesting ovarian activity.