A Pharmacokinetic Evaluation of Bioidentical Compounded Estrogen Cream and Natural Progesterone

• Status: Completed
• Trial end date: 2010-04-01
• Target enrollment: 0
• Participant gender: Female

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.

• Phase: Phase 1
• Accepts Healthy Volunteers?: Accepts Healthy Volunteers

Details

• Lead Sponsor: Mayo Clinic
• Treatments: Estradiol; Estradiol 17 beta-cypionate; Estradiol 3-benzoate; Estradiol valerate; Estrogens; Hormones; Polyestradiol phosphate; Progesterone

Criteria

Inclusion Criteria:

1. Women 40-60 years old;

2. Postmenopausal status, as documented by absence of periods for ≥ 1 year or amenorrhea for ≥ 6 months along with FSH ≥ 40 IU/L;

3. Surgical menopause;

4. History of a normal mammogram within the last 11 months;

5. Normal screening labs (within 20% of upper limit of lab normal);

6. Able to understand and sign informed consent; and

7. Able and willing to be in a monitored CRU setting and provide blood samples as requested.

Exclusion Criteria:

1. 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;

2. Medical conditions increasing the risk of complications from hormone replacement such as uncontrolled hypertension (>160/100 mmHg), smoking, diabetes and lupus;

3. Current use of estrogen, progesterone or testosterone;Depending on the drug, it could be 7 days to 6 months.

4. Current use of isoflavone containing products;

5. Current use of protein binding medications like rifampin, warfarin, antiepileptic drugs (effect on estrogen bioavailability);

6. 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

7. Women with alcohol or substance abuse or dementia (compliance issues).

8. Women who are more than ten years from their last menstrual period (unfavorable risk :

benefit ratio)

9. Women with peanut allergy (Prometrium has peanut oil)

10. 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.