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Compounded Bioidentical Hormones

Your body produces more than sixty different hormones and, without them, you couldn’t live. Hormones are chemical messengers that circulate in your bloodstream and orchestrate the continuous activity in the cells and organs in your body.

From the regulation of your heartbeat and breathing, to the control of your blood pressure and metabolism, hormones are involved. They also help fight stress, soothe pain, calm anxiety, and stimulate your immune system.

Sex hormones such as estrogens, progesterone, and testos­terone play important roles in controlling sex drive, regulating the menstrual cycle, and allowing for pregnancy and birth. Sex hormones are also potent “neurosteroids” that help maintain the central and nervous system tissue.

Proper hormone balance is critical to your health, and hormones are the most delicately balanced system in your body. Given the number of hormones that make up this system, and the continual communication between hormones that is necessary to maintain a healthy balance, the literature on hormones is vast. Unfortunately, much of the information available today is inconsistent, and at times misleading, especially with respect to hormone therapy.

Different types of hormone therapy involving various forms of hormones are now prescribed to offset hormonal imbalances, yet the differences between such therapies are not always clear. The goal of this newsletter is to provide a solid understanding of bioidentical (or biologically identical) hormones, along with their uses and benefits.

What Does “Bioidentical” Mean?

Although many bioidentical hormones are created in a lab, they have the exact same molecular structure as the hormones produced by the human body. In other words, they are chemically indistinguishable from one another. Because their chemical structures are identical, bioidentical hormones generate the same physiologic responses in the body as do the hormones already produced by the body. When making choices about hormone therapies, choosing bioidentical hormones makes good sense because they simply replace and replenish the balance your own hormones naturally provide. One well-known example of a bioidentical hormone therapy is the use of injectable human insulin in the treatment of diabetes.

With bioidentical hormone therapies, each individual’s hormone deficiencies or excesses must be evaluated. In determining the optimal hormone therapy for an individual, a practitioner must take into consideration the interactions among the different hormones, as well as other potential effects of each hormone throughout the body. For example, bioidentical progesterone protects the uterus and, at the same time, has positive effects on mood, memory, and sleep.

Bioidentical vs. Synthetic Hormones: The Rest of the Story

We are bombarded with information from television, radio, newspapers, magazines, brochures, and the Internet daily. For many people, these have become their primary sources of information about hormone therapies. However, while it may be helpful, the information disseminated may be only part of the story, or sometimes even biased, based on its sources.

Many studies and media statements discuss hormones in general terms, without making a distinction between bioidentical and non-bioidentical forms of hormones. For example, a clinical study involving medroxyprogesterone (a progestin)—a non-bioidentical form of progesterone — may inaccurately refer to the hormone as “progesterone.” Yet medroxyprogesterone and progesterone differ in their molecular structure, their derivation, and—most importantly—their effects on your body. Therefore, the results from such a study reflect only those of the particular progestin used, and not any other types of progestin, or progesterone itself, which might, in fact, produce different results.

Landmark Studies

The very studies created to test the safety and benefits of hormone therapies are often responsible for creating mis­information. In some cases, study designs have been faulty, and therefore the results misleading and potentially alarming for women taking hormones. The Women’s Health Initiative (WHI) is the landmark example of a highly publicized study that suffered from flawed design, as well as inadequate screenings of study participants.

The WHI study was developed to study the long-term effects of non-bioidentical estrogens and progestin hormone therapy in postmenopausal women and specifically assess the risk of heart disease, hip and other fractures, and breast cancer. One hormone product used in this study was Premarin, which some consider “natural estrogens” because it comes from pregnant horse urine. However, Premarin’s effects on the human body are different than the effects of bioidentical estrogens. Another hormone product used in the WHI study, Prempro, contains Premarin and medroxyprogesterone (a progestin).

Of the approximately 16,000 female participants in this trial, none were screened prior to the study to determine whether or not their own hormone levels were adequate. The Prempro portion of the study was stopped early due to an increased risk of breast cancer, heart disease, stroke, and blood clots. Soon after, the Premarin portion of the study was also stopped. These results, and the media attention they received, left women and their practitioners alarmed and unsure about what to do. They also raised many questions regarding whether women should continue with their therapy, try alternate therapies, or completely stop their therapy.

Furthermore, the publicity implied that these results applied equally to “all” hormones when, in fact, bioidentical hormones were not included in this study. In addition, some professional medical groups with financial ties to the pharmaceutical industry have promulgated the misinformation that all bioidentical and synthetic hor­mones behave in the same fashion, disregarding basic principles of physiology.

Another landmark study, the Postmenopausal Estrogen/Progestin Interventions (PEPI) Trial assessed heart disease risk factors in postmenopausal women using hormone therapies. In women, it is believed that high levels of HDL (good cholesterol) protect against coronary heart disease. This study tested three different hormonal regimens:

  1. Premarin and bioidentical progesterone, which produced the most favorable increases in HDL levels
  2. Premarin alone, which also produced favorable increases in HDL levels but significantly increased the occurrence of severe hyperplasia in women who still have a uterus
  3. Premarin and medroxyprogesterone (a progestin), which also led to increased HDL levels although the increases were less significant than those obtained with Premarin alone or Premarin and progesterone

Fortunately, research is starting to include compounded bioidentical hormone preparations. In fact, a November 2011 article in BMC Women’s Health reports on a seven-year-long cohort study of 296 women using various bio­identical estrogen, progesterone, and DHEA treatment strategies. The results confirmed marked improvements in emotional stability, irritability and anxiety, and some improvement in night sweats and hot flashes within 3 to 6 months.

Terminology Used

Common terms used when referring to bioidentical hormones include:

  • Natural
  • Bio-identical
  • Biologically identical
  • Human identical
  • Plant-based hormones

Many different acronyms are now being used for hormone therapies, including HRT, BHT, BHRT, and NHRT to name a few. HRT is the general acronym for Hormone Replacement Therapy, while BHT stands for Bioidentical Hormone Therapy. BHRT is the same as BHT with the word “replacement” added. NHRT, which stands for Natural Hormone Replacement Therapy, can be a confusing term because “natural” is also often used when describing herbal remedies, as well as BHT.

Bioidentical hormones can be either supplied by a pharmaceutical manufacturer or compounded in medication by a pharmacist. Bioidentical manufactured hormones have the advantage of being FDA approved; however, they are mass-produced and are only available in limited dosing strengths and formulations. On the other hand, compounded bioidentical hormones can be prepared for individualized dosages or strengths, and in a number of different formulations.

Why Compound?

Compounding allows healthcare practitioners to prescribe medication specific to their patient’s individual needs. One of the primary benefits of working with a compounding pharmacy is that a patient is not limited to the commercially available dosages, strengths, and forms; instead, compounded prescriptions can be changed to different formulations that may be more efficient or easier to administer. For example, if a patient has difficulty swallowing pills, the compounding pharmacist can formulate the medication or hormone(s) as a cream or gel. Or, for sensitive patients who require preservative-free or allergen-free prescriptions, a compounding pharmacist can meet these needs by preparing prescriptions accordingly.

The Many Uses of Compounded Prescriptions

Compounded prescriptions are essential to the well-being of many individuals; thus, they are used in many facets of healthcare. For example, compounded medication is commonly prescribed in the fields of pediatrics, geriatrics, internal medicine, obstetrics/gynecology, and endocrinology. The veterinary profession is also greatly aided by compounding, as many more species and sizes of animals can be treated individually (see for more information). In all of these specialties, practitioners can address specific needs whether they are dosage forms, dosage strengths, flavors, routes of administration, or combinations of medications.

Practitioners have more options in treating their patients when prescribing compounded medications, especially when it comes to the individual needs of premature infants, babies, children, and the elderly. Infants born prematurely and weighing only a few pounds rely on the compounded prescriptions and smaller dosages of many lifesaving and life-sustaining drugs. For geriatric patients, who often are unable to swallow pills and may need different dosage forms in order to take their medications, compounding is critical. A significant percentage of the needs of home healthcare patients are met by compounded medications as well, such as total parenteral nutrition, which is necessary for the post-operative healing of colon disorders.

End-of-life therapy in hospice or through palliative care also often involves compounding different dosage forms to allow patients to spend the rest of their lives free of pain and discomfort. Compounded prescriptions may be vital for patients who can’t swallow medications or don’t have the muscle mass required to endure daily multiple injections. Many cancer-fighting medications and lifesaving intravenous drugs used in hospitals are compounded. Finally, hormone therapies can be prescribed to suit a patient’s individual hormone needs, thanks to compounding.

Dr. David Brownstein, an advocate of compounded prescriptions, points out in a special report in Integrative Medicine that patients need individualized doses of hormones. “Pharmaceutical companies want us to believe that everybody needs the same dose of all medications,” he writes. “In truth, everyone has a unique biochemical thumbprint; we don’t all need the same dose of pharmaceuticals, vitamins, or even the same amounts of nutrients in foods.”

For optimal hormone treatment, a practitioner can fine-tune or modify the dose or prescription of a compounded BHT as an individual’s hormonal needs change or match an individual’s preferences and absorption abilities.

Another advantage of compounded BHT is that multiple hormones can be combined in a single dosage form to ensure better patient compliance.

A Bit of History

Until the 20th century, pharmacy was all compounding and involved the use of water and alcohol for the extraction of substances from plants, animals, and minerals. Going back to the time of Hippocrates (4th century BC), the preparation of pills, ointments, oils, and inhalations was commonplace. Over the next two thousand years, pharmacists continued to apply the art and science of pharmacy to the preparation of medication, using the highest standards possible at the time.

During the 1980s and 1990s, the number of compounded prescriptions began increasing due to a resurgence of recognition of individual patient needs—something that mass-produced drugs are unable to accomplish because many are available only in limited dosage forms and strengths. Today, the demand for prescription compounding makes it a rapidly growing component of pharmacy practice. In a 2005 survey of independent pharmacists in four Midwestern states, 94% of the respondents indicated that they perform compounding services.

Compounding pharmacists formulate combinations that may include approved FDA and/or pharmaceutical-grade ingredients, as determined by a medical practitioner, into specific dosage forms such as capsules, creams, gels, lozenges, tablets, suppositories, and other forms.

In the pharmacy industry, compounding pharmacists are regulated by their state boards of pharmacy. Standards are set by the U.S. Pharmacopeia and National Association of Boards of Pharmacy for quality assurance. The FDA also has jurisdiction over ensuring the quality of the ingredients involved in compounding.

The Triad

With compounded hormone prescriptions, it is imperative that the communication lines remain open and free-flowing among the three key players shown here: the patient, the licensed practitioner, and the licensed pharmacist. All three individuals play a critical role in obtaining and maintaining the patient’s optimal hormone balance.

The Patient

To achieve hormone balance, the patient needs to pay careful attention to symptoms and communicate this information to the practitioner. Using this information, the practitioner can direct the pharmacist in developing an effective hormone therapy. It is important that patients have good communication with their practitioner and pharmacist with regard to their hormone therapy, and feel comfortable asking questions and requesting information.

The Practitioner

The practitioner examines, evaluates, tests, diagnoses, and prescribes treatment. Once the appropriate hormone therapy is prescribed, the practitioner monitors the effects of hormone therapy. Compounded bio­identical hormones can be adjusted in their dosing as well as their formulation, under the guidance of the practitioner, to achieve the goal of optimal hormone balance for each of their patients.

The Pharmacist

The pharmacist provides quality assurance for each and every prescription compounded. The compounding pharmacist is available to the practitioner and the patient to provide information and resources about hormone strengths/dosages, formulations, and effects.


Compounded bioidentical hormone therapy has significantly improved the lives of many people who suffer from symptoms related to a hormone imbalance. However, all hormone therapies —whether bioidentical or not—have risks associated with them, although these risks may be different depending on the kind of hormone therapy.

You and your practitioner should discuss the advantages and disadvantages of various hormone therapies, and weigh the risks of therapy against the risks of the potential health issues and discomfort associated with leaving your hormone imbalance untreated. Awareness, education, and communication are key to optimal hormone balance.

A Note from the President and Pharmacists at Women’s International Pharmacy

Compounding pharmacists are valuable resources to both practitioners and their patients. Prior to obtaining a compounded bioidentical hormone prescription, be confident that your prescription comes from a highly qualified pharmacy that specializes in compounding. Work with pharmacists who can offer you reliable information about hormone therapies, answer your questions, and provide accurately compounded prescriptions.

The pharmacists at Women’s International Pharmacy understand the uniqueness of each person and go the extra mile, taking the time and effort to meet the specific needs of practitioners and their patients.

Connections is a publication of Women’s International Pharmacy, which is dedicated to the education and management of PMS, menopause, infertility, postpartum depression, and other hormone-related conditions and therapies.

This publication is distributed with the understanding that it does not constitute medical advice for individual problems. Although this material is intended to be accurate, proper medical advice should be sought from a competent healthcare professional.

Publisher: Constance Kindschi Hegerfeld, Executive VP – Women’s International Pharmacy
Co-Editors: Julie Johnson and Carol Petersen, RPh, CNP – Women’s International Pharmacy
Writer: Kathleen McCormick – McCormick Communications

Copyright © Women’s International Pharmacy. This newsletter may be printed and photocopied for educational purposes, provided that your copy (or copies) include full copyright and contact information.

For more information, please visit or call 800.279.5708.

Women’s International Pharmacy | Madison, WI 53718 | Youngtown, AZ 85363

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