Eviana

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Medically reviewed

Marina Burgos

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Eviana

Property Description
Active ingredients Estradiol, Norethisterone
Form Film-coated tablets (oral)
Pharmacological class Hormone Replacement Therapy (HRT) agent
General purpose Replacement of deficient endogenous hormones
Origin Synthetic steroid hormones

Eviana is a prescription-only medicine (POM) formulated as film-coated tablets for oral administration, and it belongs to the Hormone Replacement Therapy (HRT) agent class. As a combination of synthetic steroid hormones, its general purpose is the replacement of deficient endogenous hormones in postmenopausal women, addressing hormonal changes following the cessation of ovarian function. Eviana is specifically categorized as an Estrogen-Progestogen combination drug, utilizing a continuous combined regimen.

What Type of Medicine is Eviana? (Identity and Classification)

Eviana is a combined hormonal therapy used to provide systemic replacement of key sex hormones, classified as an HRT agent within the broader pharmacological group of sex hormones and modulators of the genital system. The product is indicated for hormone replacement therapy. This confirms that the primary function of the medicine is to substitute for hormones that are naturally declining in the body.

This medicine utilizes a continuous combined regimen, an administration pattern where both hormones are taken consistently every day without interruption, which distinguishes its classification from sequential or cyclical HRT regimens. This combined nature is particularly important for postmenopausal women who retain an intact uterus, as it manages the need for both estrogen and progestogen replacement.

Composition: Estradiol and Norethisterone

The active ingredients in Eviana are Estradiol and Norethisterone, both synthesized for therapeutic use. Estradiol supplies the necessary Estrogenic activity (an estrogen), while Norethisterone contributes the Progestogenic activity (a progestin). Estradiol and Norethisterone are recognized as a continuous combined oral dosage form for hormone therapy. This shows the medicine is a balanced hormonal treatment provided in a daily tablet form.

The drug is supplied as fixed-dose, monophasic film-coated tablets for oral administration. The inclusion of Norethisterone alongside Estradiol ensures essential endometrial protection. This combination product balances the two synthetic steroid hormones to mitigate the effects of hormone deficiency states by aiming for a sustained hormonal profile.

Regulatory References

  1. NIH MedlinePlus on Estradiol and Progestin
  2. DailyMed Estradiol and Norethindrone Acetate

What side effects are possible with Eviana?

Possible Side Effects and Safety Information

The safety profile of the estradiol and norethisterone combination is defined by officially documented adverse reactions and systemic risks, categorized by frequency and the body system affected. These regulatory classifications reflect how government authorities communicate the medicine's safety characteristics.

Adverse Reactions by System and Frequency

Very Common reactions (those affecting up to 1 in 10 people) are typically related to the reproductive system, primarily vaginal hemorrhage or spotting. This effect is explicitly documented as being more likely during the first six months of treatment and often decreases thereafter.

Common adverse reactions listed in regulatory documents (affecting up to 1 in 10 people) involve general systemic or organ-specific disturbances, including headache, nausea, abdominal pain, breast pain or tenderness, and weight increase.

System-Organ Class Examples of Listed Effects
Reproductive System Endometrial thickening, fungal genital infection
Nervous System Headache, insomnia
Skin and Subcutaneous Alopecia, Chloasma (skin pigmentation)

Serious Safety Risks and Constraints

The medicine's use is associated with well-documented, potentially serious adverse reactions of the vascular system, including Venous Thromboembolism (VTE), stroke, and myocardial infarction (heart attack). The increased risk of VTE is officially stated to be more likely in the first year of HRT use.

Usage also carries an increased, officially recognized risk of certain neoplasms, including breast cancer. Furthermore, specific safety constraints exist: the medicine is contraindicated for individuals with a history of blood clots, severe hepatic impairment (liver disease), or undiagnosed abnormal genital bleeding.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory information for Eviana (estradiol and norethisterone) provides clear guidelines for the management of suspected overdose, focusing exclusively on documented manifestations and mandated emergency actions.

Documented Overdose Scope

Domain Official Regulatory Statement
Documented overdose presentations Overdosage is primarily associated with nausea, vomiting, breast discomfort (or enlargement), fluid retention, and vaginal bleeding (or withdrawal bleeding).
Dose-related or exposure-related factors Ingestion of large doses by young children has been reported to not reveal acute serious ill effects.
Emergency-response statements Seek immediate medical attention for a suspected overdose. Contact a regional poison control centre or equivalent emergency services.

Overdose Classifications (High-Level)

Classification Official Regulatory Statement
Antidote information No specific antidote is available.
Management Measures Treatment should be symptomatic and supportive in nature. The patient must be monitored for signs of adverse reactions.

Official Overdose Statements

  • Overdosage may present with nausea, vomiting, breast discomfort, fluid retention, and vaginal bleeding.
  • No specific antidote is available for Eviana overdose.
  • Treatment should be symptomatic and supportive.
  • Seek immediate medical attention for a suspected overdose.

Connection to the overall overdose profile: Regulatory documents define the overdose profile primarily through a set of limited, non-life-threatening clinical manifestations and the absence of a specific countermeasure. This constraint mandates that management is focused entirely on symptomatic and supportive treatment while requiring that the patient seek immediate medical attention for clinical assessment and monitoring.

Therapeutic Uses of Eviana

What Eviana Treats: Main Uses and Benefits

Eviana is a combined hormone replacement therapy primarily used in postmenopausal women to address symptoms related to systemic imbalance following the cessation of ovarian function. It may provide therapeutic support across three key symptomatic domains, often used when symptoms significantly interfere with daily stability. The medication is commonly indicated for specific conditions associated with menopause.


The medicine is generally used to address groups of symptoms that may become intense or disruptive, falling into therapeutic categories such as support for moderate to severe vasomotor symptoms, support for urogenital tissue discomfort, and long-term support in addressing postmenopausal osteoporosis risk. It is often used during phases when symptoms become more noticeable, offering supportive relief for menopausal women.

“The treatment may support the patient during difficult episodes by helping to ease distress, which contributes to easing the overall symptom load.”

Supportive Therapeutic Domains

Symptom Domain Key Benefit
Vasomotor Symptoms May help maintain a sense of stability and can support functional comfort against hot flushes and night sweats.
Urogenital Discomfort May contribute to improved day-to-day comfort by addressing symptoms like vaginal dryness and burning.
Osteoporosis Risk May assist with maintaining skeletal integrity in situations where long-term bone loss may affect functional stability.

Quick Fact: Support for Vasomotor Symptoms Eviana is applied in addressing the heightened physiological activity of hot flushes and night sweats, which may assist with maintaining functional stability during symptomatic periods.

Regulatory References

  1. NIH DailyMed official prescribing information

Eligibility and Restrictions for Use

Who Can and Cannot Use Eviana?

Eviana is a prescription Hormone Replacement Therapy (HRT) specifically authorized for use in postmenopausal women, defined in official labeling as women more than one year after their final menstrual period. The combination of estrogen and progestogen makes it suitable for postmenopausal women who have an intact uterus.


Contraindications (Who Must Not Use Eviana)

Official regulatory documents classify several conditions as absolute contraindications. Eviana must not be used if a woman has or is suspected to have known, past, or suspected breast cancer or any other estrogen-dependent malignant tumour. It is also prohibited for patients with a history of Venous Thromboembolism (VTE), Arterial Thromboembolic Disease (such as stroke or myocardial infarction), or thrombophilic disorders.

Absolute non-eligibility also applies to women with acute liver disease, undiagnosed abnormal genital bleeding, untreated endometrial hyperplasia, or a known hypersensitivity to the ingredients.


Age and Physiological Status Rules

Status Eligibility Statement
Pregnancy Contraindicated (requires immediate discontinuation).
Pediatric (<18) Not established for use in children and adolescents.
Geriatric (>65) Clinical experience is limited; starting HRT after this age is associated with an increased risk of probable dementia.

Conditional Use

Use of Eviana requires close medical supervision if conditions such as uncontrolled high blood pressure (hypertension), diabetes mellitus, uterine fibroids (leiomyoma), or endometriosis are present, as these may require specific monitoring.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documentation for Eviana (Estradiol/Norethisterone) is structured around two main types of clinically significant interactions: those altering the hormone levels (pharmacokinetic) and those causing additive effects (pharmacodynamic).

Pharmacokinetic (Exposure-Altering) Interactions

The most commonly documented interaction involves the CYP3A4 enzyme system in the liver. Co-administration with strong and moderate CYP3A4 inducers is documented to cause a clinically significant reduction in the plasma concentration (AUC and C max) of both active hormones. This includes medicines such as Rifampicin, certain Anticonvulsants (e.g., Carbamazepine, Phenytoin), and the herbal product St. John’s Wort. Conversely, co-administration with strong CYP3A4 inhibitors (e.g., Ketoconazole) is officially documented to increase the systemic exposure to the hormones.

Pharmacodynamic and Restriction Interactions

Classification Interacting Substance/Class Official Documented Outcome
Contraindicated Combination Hepatitis C Combination Therapies (Ombitasvir/Paritaprevir/Ritonavir pm Dasabuvir) Formally prohibited due to documented risk of significant liver enzyme elevation
Clinically Significant Antidiabetic Agents (e.g., Insulin, Metformin) May officially impact glucose tolerance and insulin sensitivity, requiring potential adjustment of the antidiabetic regimen

No mandatory timing or separation rules are explicitly stated in official labeling for co-administration with interacting drugs.

Mechanism of Action

Eviana's mechanism is based on hormone substitution, utilizing two synthetic steroid hormones that act as agonists to modulate specific nuclear receptors and genomic pathways. The action of Estradiol involves full agonism at Estrogen Receptors (ERalpha and ERbeta) within the brain's hypothalamus. This receptor activation modulates activity in the vasomotor center, initiating a cascade that restores a stable, narrow range for the core body temperature set point. This action contributes to the modulation of physiological responses to temperature fluctuations.

Concurrently, Norethisterone functions as a full agonist at Progesterone Receptors (PR) localized primarily in the uterine lining. The continuous presence of PR continuously counteracts the proliferative signals initiated by Estradiol, driving the tissue toward secretory differentiation and atrophy. This physiological shift is essential for counter-modulating Estradiol's proliferative signal on the endometrium.

Furthermore, Estradiol's peripheral agonism regulates bone cell activity by slowing the activity of bone-resorbing cells (osteoclasts), modulating bone cell activity to decrease the rate of bone resorption. This agonistic action is also involved in processes that promote cell viability and affect tissue structure in the urogenital tract.

Dosage and Administration Information

How Eviana is Used: Official Administration Guidelines

Eviana is a combined hormone replacement therapy (HRT) product used via a continuous combined regimen, which means both active ingredients are taken every day without interruption. The medicine is provided as a film-coated tablet for oral administration.

Standard Dosing and Schedule

The standard prescribed dose is one tablet once daily. This fixed-dose combination contains Estradiol 0.5 mg and Norethisterone acetate 0.1 mg. In line with clinical practice, treatment is initiated and continued using the lowest effective dose for the shortest possible duration consistent with therapeutic needs. The tablet should be taken at the same time every day to ensure consistent hormonal delivery.

Initiation and Adjustment Protocol

Administration Scenario Procedural Guideline
Starting Treatment (New Users) Treatment may be initiated on any convenient day.
Switching from Sequential HRT Begin taking Eviana immediately after the completion of the withdrawal bleeding phase of the previous regimen.
Assessing Dose Efficacy The initial dose regimen must be followed for a minimum of three months before a healthcare provider should assess its effectiveness and consider any dose adjustment, such as switching to a higher strength combination.

Handling of Missed Doses

If a dose is forgotten, the tablet should be taken as soon as possible, provided it is within 12 hours of the usual scheduled time. If more than 12 hours have elapsed, the missed tablet must be discarded, and the patient should resume taking the next tablet at the regular scheduled time. Failure to adhere to the strict 12-hour window may increase the likelihood of breakthrough bleeding or spotting.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Eviana

Evidence for use in Moderate to Severe Vasomotor Symptoms

Research has explored the effects of the continuous combined hormone combination in short-term Randomized Controlled Trials (RCTs) and multi-center clinical trials. These studies primarily focused on postmenopausal women experiencing frequent and noticeable outcomes related to systemic or functional imbalance, such as hot flushes and night sweats. Findings describe patterns observed in the studies where the hormonal combination was observed in populations compared to those receiving a placebo. The evidence base includes multiple Randomized Controlled Trials (RCTs) that examined these core vasomotor symptom endpoints. However, primary research focusing on symptoms was often designed for short-term observation, limiting information for long-term sustained effects.

Evidence for the Endometrial Protection Component

The research exploring the combined use of the hormones is supported by evidence from RCTs and longitudinal studies. These studies were used in research exploring how specific physiological changes evolve over time in postmenopausal women who retain an intact uterus and receive estrogen. Research examined the incidence of specific changes in the lining of the uterus, known as endometrial hyperplasia. The study protocols involved the monitoring of these changes, often through histological analysis. The continuous addition of norethisterone was observed in some studies to be associated with expected tissue patterns.

Study Focus: Bleeding Patterns and Amenorrhea

Within the trials for continuous combined regimens, studies monitored the occurrence of unscheduled bleeding or spotting. Studies reported how symptoms evolved in the observed populations, with the documentation of an increasing rate of amenorrhea (no bleeding or spotting) as the treatment period continued over six to twelve months. Individual responses may vary, and there is limited information on the exact individual prediction for when stability will be achieved.

Evidence for Support in Addressing Postmenopausal Osteoporosis Risk

Research has explored the effects of systemic estrogen replacement on the maintenance of skeletal integrity. Studies monitored changes in Bone Mineral Density (BMD) at the spine and hip. The evidence for bone outcomes is contextualized by the broader scientific landscape regarding estrogen and bone health. However, large-scale assessments often involved different or older HRT formulations; therefore, long-term data specific to this exact combination and dose are limited.

Key Studies & References Estradiol and Norethindrone Acetate Tablets: DailyMed

Frequently Asked Questions (FAQ)

Common questions about Eviana (FAQ)

Q: Is Eviana a type of birth control pill or is it something different?

Eviana is classified as a Hormone Replacement Therapy (HRT) agent used in postmenopausal women. According to official regulatory labels, it is specifically indicated for the replacement of deficient hormones and is not indicated or studied for the purpose of preventing pregnancy.


Q: How quickly does Eviana typically start to work for its main approved purpose?

Clinical guidance suggests the initial dose regimen should be followed for a minimum of three months before a healthcare provider assesses its effectiveness. This timeframe is for the healthcare provider to assess its effectiveness for the authorized use, such as modulating vasomotor symptoms.


Q: Is spotting or irregular bleeding common when first starting Eviana?

Spotting or vaginal hemorrhage is officially listed as a Very Common adverse reaction, meaning it may affect up to 1 in 10 people in clinical studies. Official documents note that this effect is more likely during the first six months of treatment, and studies document a reduction in incidence thereafter.


Q: Does Eviana cause changes to body weight, according to clinical reports?

Weight increase is officially listed in regulatory documents as a Common adverse reaction, which is reported by up to 1 in 10 people. The potential for changes to body weight is acknowledged, with 'weight increase' being the specific common adverse reaction listed.


Q: Are there any serious risks associated with taking Eviana that I should be aware of?

Official documents identify potentially serious adverse reactions primarily of the vascular system. These risks include an increased likelihood of Venous Thromboembolism (VTE) (blood clots), stroke, and myocardial infarction (heart attack). The increased risk of VTE is officially stated to be more likely in the first year of HRT use.


Q: Is there an age limit for who can or cannot start taking Eviana?

Eviana is authorized for use only in postmenopausal women (defined as women more than one year after their final menstrual period). Use is not established for children and adolescents. Clinical experience is limited in women over 65 years. Official safety information notes an increased risk of probable dementia when Hormone Replacement Therapy is initiated after this age.


Q: What are the common signs of an allergic reaction to Eviana or its ingredients?

Hypersensitivity to the ingredients is a formal contraindication for using Eviana. While specific signs are not universally listed in the product's safety section, serious allergic reactions generally involve sudden swelling, such as of the face, tongue, or throat, and difficulty breathing. Any signs of a possible allergic reaction are generally considered a reason to seek prompt medical guidance.


Q: Is there official information available regarding Eviana and hair loss or acne?

Alopecia (hair loss) is listed in regulatory documents as a Common adverse reaction, affecting up to 1 in 10 people. Acne is typically not listed in the official adverse reactions table for this specific combination product.


Q: Can taking Eviana affect the results of other medical tests, like a mammogram?

Official information indicates that the estrogen component in HRT can potentially alter the results of certain laboratory tests, including some measures of thyroid function and coagulation parameters. This is a common pattern observed with systemic hormonal treatments.


Q: What is the difference between Eviana and a progestin-only pill?

Eviana is classified as an Estrogen-Progestogen combination drug used for Hormone Replacement Therapy. A progestin-only pill, by contrast, is a hormonal contraceptive that contains only the progestin component and is used for birth control.


Q: Can Eviana help with bone health or prevent osteoporosis?

Official regulatory documents indicate that Eviana is authorized for the prevention of osteoporosis in postmenopausal women. This indication is for women considered at high risk of fractures and for whom non-estrogen treatment options are considered unsuitable.


Q: Is the risk of cancer (breast, ovarian, endometrial) different for those taking Eviana?

Official documents state that combined HRT is associated with an increased, officially recognized risk of certain types of cancer, including breast cancer. The progestogen component is included in the combined therapy to address the estrogen-associated risk of endometrial changes.


Q: Are there certain vision changes or headaches that are considered serious warning signs while on Eviana?

The serious risk of a stroke is explicitly acknowledged in regulatory warnings. Symptoms such as sudden, severe headaches or visual disturbances are considered warning signs generally associated with serious vascular events and should be evaluated promptly.


Q: Are there other diseases or conditions that can worsen while taking Eviana?

Official regulatory documents list conditions such as uncontrolled high blood pressure, diabetes mellitus, uterine fibroids, and endometriosis as requiring close medical supervision and specific monitoring during Eviana use.


Q: Can Eviana interact with certain antifungal medications?

Official documents explicitly mention that Ketoconazole, an antifungal medication, acts as a strong CYP3A4 inhibitor. This type of interaction may officially increase the overall level of the hormones in Eviana in the body.


Q: Is it possible to take Eviana continuously without the tablet-free days?

Eviana is designed as a continuous combined HRT product. Official documents describe this administration pattern as taking the active ingredients every day without interruption or tablet-free periods.


Q: Does Eviana have a different name in other countries?

The official European Medicines Agency (EMA) product information references 'Activelle and associated names'. This indicates that the same combination product is marketed under different, associated names in various other countries.


Q: What is the role of the progestogen component in Eviana, beyond just balancing the estrogen?

The progestogen component (Norethisterone) is primarily included to provide essential endometrial protection. It works by continuously counteracting the proliferative signals that the estrogen component (Estradiol) initiates on the uterine lining.


Q: Why is it stated in some documents that Eviana is not a contraceptive?

Eviana's official indication is strictly for the replacement of deficient endogenous hormones in postmenopausal women. It is not approved or studied for birth control, meaning it does not provide reliable pregnancy prevention.


Q: Is it necessary to use a non-hormonal barrier method for contraception while on Eviana?

Since Eviana is not a contraceptive and is intended for use in postmenopausal women, it does not prevent pregnancy. If a woman is still considered to be of reproductive potential, official guidance implies that non-hormonal methods may be required for contraception.


Q: Can someone with a history of severe hepatic impairment use Eviana?

Severe hepatic impairment (liver disease) is listed in official regulatory documents as an absolute contraindication. This means the medicine must not be used in patients with this condition.


Q: What should be done if irregular bleeding or spotting continues past the first 6 months of treatment?

While breakthrough bleeding often lessens after the first six months, official warnings state that any persistent, recurrent, or new abnormal genital bleeding requires medical investigation. This investigation is necessary to evaluate the cause of the bleeding.


Q: Does Eviana interact with common antibiotics?

The antibiotic Rifampicin is explicitly listed in regulatory documents as a strong enzyme inducer that reduces hormone exposure. Other narrow-spectrum antibiotics that are not strong enzyme inducers are generally less likely to cause a clinically significant interaction, but consultation regarding all medications is standard practice.


Q: What should I know if I need to have a surgery while I am taking Eviana?

Official regulatory guidelines include information that HRT should be discontinued well in advance of scheduled surgery. This is due to the increased risk of Venous Thromboembolism (VTE) associated with both the medicine and periods of prolonged immobilization after surgery.


Q: Is there a link between taking Eviana and changes in blood pressure?

The regulatory documents acknowledge that hypertension (high blood pressure) is a condition requiring close medical supervision. The estrogen component in HRT is known to potentially cause fluid retention, which can contribute to changes in blood pressure.


Q: What is the reported experience of using Eviana in women over 65 years old?

Official labeling states that clinical experience in women over 65 years of age is limited. Furthermore, there is an officially recognized increased risk of probable dementia when starting HRT after this age.


Q: What is the relationship between Eviana and gallbladder disease?

Regulatory safety information indicates that estrogens in HRT are known to be associated with an increased risk of gallbladder disease in postmenopausal women. This risk is generally acknowledged in the safety profile for combined hormone replacement therapy products.


Q: Do studies suggest that Eviana has any effect on mood or feelings of depression?

While insomnia (difficulty sleeping) is listed as a Common adverse reaction, regulatory documents for hormonal products also typically list depression, anxiety, or specific mood disturbances in their safety profiles as potential, though less frequent, effects.

How should Eviana be stored and disposed of?

How to Store and Dispose of Eviana?

The storage and disposal instructions for Eviana (estradiol/norethisterone acetate) are based strictly on official regulatory guidance to ensure product stability and environmental safety.

Official Storage Requirements

Condition Requirement
Temperature Do not store above 25 C.
Handling Do not refrigerate.
Protection Store in the original container and outer carton to protect from light.

Disposal

Properly disposing of unused or expired medicine is mandatory to prevent environmental contamination and misuse.

Condition Requirement
Disposal Any unused medicinal product or waste material must be disposed of in accordance with local requirements.

These constraints define how the medicine must be protected, handled, and discarded, without reference to use, dosage, or therapeutic outcomes.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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