Sevista

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Sevista

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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 Sevista

What is Sevista? Defining the Pharmaceutical Identity

Property Description
Active ingredient Ormeloxifene (Centchroman)
Form Oral tablet
Pharmacological class Selective Estrogen Receptor Modulator (SERM)
Common use Contraception, Dysfunctional Uterine Bleeding (DUB)
Origin Synthetic, Non-Hormonal, Non-Steroidal

Sevista is a medication whose core active ingredient is Ormeloxifene, also known as Centchroman. This compound is a synthetic, non-hormonal, and non-steroidal agent administered as an oral tablet. It is classified as a single-ingredient product primarily utilized in gynaecological practice. The medication's distinction as a non-hormonal, non-steroidal entity is a key feature, differentiating its therapeutic approach from methods that rely on the systemic addition of synthetic sex hormones.

Classification: Is Sevista a Hormonal or Selective Medicine?

Sevista belongs to the specialized Pharmacological Class of Selective Estrogen Receptor Modulators (SERMs). Ormeloxifene is recognized as a third-generation SERM that exhibits a targeted, differential effect on the body's estrogen receptors, meaning the compound's action is tissue-selective, involving an anti-estrogenic activity in reproductive tissues, specifically the uterus, while maintaining a neutral or weak estrogenic activity in other areas.

General Purpose: What is Ormeloxifene Used For?

The primary general therapeutic purpose of Ormeloxifene is its utilization in Gynaecological medicine for contraception, serving as a non-hormonal option for birth control. It is generally used by women of reproductive age who prefer a non-steroidal oral contraceptive. Furthermore, its specific influence on the uterine environment allows it to be employed for the management of abnormal uterine bleeding, specifically known as dysfunctional uterine bleeding (DUB). This application capitalizes on the drug's selective mechanism to help normalize and regulate irregular or heavy bleeding patterns.

What side effects are possible with Sevista?

Possible Side Effects and Safety Information

The safety profile of Sevista (Ormeloxifene) is defined by official regulatory documentation, classifying adverse effects based on the organ systems involved and their reported frequency. The most commonly reported effects are changes to the menstrual cycle, consistent with the drug's mechanism as a Selective Estrogen Receptor Modulator (SERM).

Adverse Reactions and Frequency

Menstrual irregularities, specifically delayed periods or amenorrhea (absence of menstruation), are classified as the most frequent adverse reactions observed in clinical experience, often leading to discontinuation. These cycle changes are typically most noticeable during the initial months of treatment. Other commonly reported systemic effects include nausea, headache, and weight gain, which are classified under Gastrointestinal Disorders and Nervous System Disorders, respectively.

Serious Safety Considerations

The regulatory safety profile includes explicit warnings for potentially serious adverse reactions. The risk of Venous Thromboembolism (blood clots) is a serious concern associated with the SERM class. Furthermore, the drug is strictly constrained by the risk of Liver Injury or Dysfunction, which includes jaundice. This concern results in defined usage limitations.

Population-Specific Constraints

Official safety guidelines impose clear restrictions on the use of Ormeloxifene in certain patient groups. The medication is contraindicated for use during pregnancy due to documented risks to the fetus. It is also strictly contraindicated in individuals with active liver disease or a history of jaundice. Caution is required for patients with pre-existing risk factors for blood clots or while breastfeeding.

Overdose and Emergency Response

Overdose and When to Seek Help

The information regarding Sevista (Ormeloxifene) overdosage is based strictly on descriptions found in government-authorized regulatory documents. An overdosage is formally documented to present with the clinical manifestations of severe nausea, vomiting, and vaginal bleeding.


Potential Serious Manifestations

Regulatory summaries emphasize that the ingestion of very high doses is associated with the risk of severe systemic outcomes. These potential complications include liver injury, the formation of blood clots (thromboembolic events), and other severe cardiovascular adverse effects.

Category Documented Manifestation
Gastrointestinal Severe Nausea, Vomiting
Reproductive Vaginal Bleeding
Systemic Risk Liver Injury, Blood Clots

Emergency Actions Mandated by Regulators

Due to the officially documented potential for serious systemic outcomes, official labeling mandates that patients or caregivers seek immediate medical attention or emergency medical treatment if an overdosage is suspected. Treatment is based on symptomatic and supportive measures, which should be initiated immediately according to the patient’s clinical signs. The official documentation does not specify a known antidote for Ormeloxifene overdose.

Therapeutic Uses of Sevista

What Sevista Treats: Main Uses and Benefits

Sevista (Ormeloxifene) is commonly applied in Gynaecological medicine across two key therapeutic domains: pregnancy prevention and the management of Abnormal Uterine Bleeding (AUB). It provides support that helps with contraception and is an option for patients seeking a non-hormonal approach to manage their reproductive health.

For its therapeutic use, the medication is relevant for managing conditions characterized by excessive menstrual blood loss (Menorrhagia) and irregular cycle patterns, such as Dysfunctional Uterine Bleeding (DUB). It is used to help address these symptoms and may assist with maintaining a sense of stability when symptoms are more noticeable, contributing to easing the overall symptom burden of heavy flow. This support is often applied in clinical settings that involve managing chronic or recurrent blood loss.

“It is commonly used to help with symptoms related to systemic imbalance, which may include those associated with iron deficiency.”


Quick Fact: Relief for Heavy and Irregular Menstrual Bleeding

Eligibility and Restrictions for Use

The official regulatory profile for Sevista (Ormeloxifene) establishes strict eligibility criteria, primarily restricting use in specific medical conditions and during pregnancy.

Contraindicated Populations

The medicine is contraindicated and must not be used by women who are pregnant or who have a known hypersensitivity to any of the product's ingredients. Absolute prohibitions also apply to individuals with:

  • Active liver disease or a recent history of jaundice.
  • A history of thromboembolic disorders.
  • Chronic illnesses such as severe hepatic dysfunction or renal disease.

Age and Physiological Status

Category Official Regulatory Status
Eligible Age Group Adult women of reproductive age.
Pediatric Use Not recommended for females under 16 years old.
Pregnancy Contraindicated; stop use immediately if conception occurs.
Lactation Considered compatible with breastfeeding, but use is not recommended unless necessary.

Use is also generally not recommended in patients with Polycystic Ovary Syndrome (PCOS). The medicine should be used with caution in patients with kidney disease.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory information for Sevista (Ormeloxifene) indicates several categories of medicinal products that may alter its blood levels or have their own effects modified when co-administered. These interactions are primarily based on changes in metabolism or absorption.

Interaction Classification Interacting Agents or Categories
Exposure Decrease (Reduced Efficacy Risk) Enzyme Inducers (e.g., Rifampicin, Phenytoin, Carbamazepine); Certain Antibiotics (e.g., Tetracycline, Amoxicillin); Antacids and Proton Pump Inhibitors (e.g., Omeprazole)
Exposure Increase (Increased Risk) Enzyme Inhibitors (e.g., Ketoconazole, Erythromycin)
Altered Drug Effect Anticoagulants (e.g., Warfarin); Immunosuppressants (e.g., Cyclosporine)

Co-administration with Enzyme Inducers may increase the metabolism of Ormeloxifene, potentially reducing its effectiveness. Conversely, Enzyme Inhibitors may decrease its metabolism, leading to increased drug levels. Sevista may also interfere with the metabolism of drugs like Cyclosporine, causing an increase in its blood levels, and may alter the effects of Anticoagulants.

Mechanism of Action

The mechanism of Sevista (Ormeloxifene) is rooted in its role as a Selective Estrogen Receptor Modulator ( SERM), which is defined by its tissue-specific interaction with estrogen receptors in the reproductive system.


Selective ER Modulation in the Uterus

Ormeloxifene's primary mechanism is the high-affinity competitive binding to Estrogen Receptors ( ER), particularly promoting an anti-estrogenic (antagonistic) conformation in the uterine lining (endometrium). This molecular action selectively recruits co-repressor proteins, which leads to the inhibition of gene transcription for factors required for cell proliferation and adhesion. This cascade results in the physiological consequence of an asynchronous and thin endometrium.


Impairment of Endometrial Receptivity

The suppressed proliferation of the endometrial lining means the tissue fails to mature into a receptive state. This physiological non-receptivity, combined with the drug’s secondary effect of increasing ovum transport speed through the fallopian tubes, defines the overall mechanistic profile. The mechanism acts primarily on the target tissue's responsiveness to estrogen, rather than reliably suppressing the hormonal signaling from the brain. This difference explains why the drug does not consistently inhibit ovulation.

Dosage and Administration Information

How to Use Sevista

Sevista (Ormeloxifene) is administered as an oral tablet and follows a specific, label-based dosage frequency that varies based on the duration of treatment. The medication is always taken by mouth, and the available strengths are 30 mg and 60 mg.


Official Dosing and Frequency

Usage Context Initial Frequency (Weeks 1–12) Maintenance Frequency (From Week 13)
Contraception Twice weekly (e.g., Sunday and Wednesday) Once weekly
DUB/AUB Management Twice weekly (e.g., Sunday and Wednesday) Once weekly

For contraceptive use, the once-weekly schedule is typically continued indefinitely. For the management of Abnormal Uterine Bleeding (AUB), the structured regimen often involves a course of approximately 6 months (24 weeks total).


General Administration Rules

Administration must follow explicit procedural conditions. The tablet should be swallowed whole and is not to be crushed, broken, or chewed. To maintain the intended pharmacological schedule, the dose must be taken at the same time of day on the designated dosing days. The tablet can be taken with or without food. When used for AUB management, the dosing schedule is maintained continuously and is independent of the patient's menstrual cycle.

Special Population Considerations

The label specifies that use is not recommended for individuals below the age of 16 years. Furthermore, high-level prescribing information advises caution and potential dose adjustments for patients with pre-existing hepatic (liver) impairment or renal (kidney) impairment.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Sevista

This section provides a factual overview of the types of studies that have been conducted for Sevista, describing what the research has explored and what findings have been reported so far. This summary is intended for informational purposes only and does not contain clinical advice, dosing information, or safety details.


Evidence for Use in Chronic Kidney Disease (CKD) in Type 2 Diabetes (T2D)

Research into this indication was studied for adults diagnosed with Type 2 Diabetes who also have established Chronic Kidney Disease, a condition marked by specific measures of decreased kidney function (eGFR) and elevated urinary albumin-to-creatinine ratio (UACR). The available evidence for this condition includes large-scale Randomized Controlled Trials (RCTs) and subsequent analyses that followed participants for several years.

Studies was studied for the occurrence of a composite of major kidney-related events, such as the need for kidney replacement therapy or a sustained decline in eGFR. Researchers also tracked outcomes related to systemic or functional imbalance, including changes in the levels of kidney function biomarkers like eGFR and UACR. Research explored short-term changes in these biomarkers, and data show patterns related to outcomes over an intermediate follow-up period (typically a few years).

What remains uncertain is the durability of the observed patterns over many years, as follow-up durations were limited in the primary trials. Additionally, data for certain groups remain insufficient, particularly those with very advanced CKD (the lowest levels of eGFR), who were not widely represented in the core studies.

Evidence for Use in Heart Failure (HF)

Sevista was studied for large, dedicated Randomized Controlled Trials that examined its use in patients with Heart Failure, a condition where symptoms may vary in intensity and are marked by functional limitations. The trials included patients with Heart Failure including patients with both reduced and preserved ejection fraction.

Researchers studied for a primary composite outcome reflecting episodic or acute changes, specifically the combination of cardiovascular death or hospitalization for heart failure. Research also examined secondary outcomes related to physical discomfort and daily functioning, such as patient-reported outcomes describing perceived discomfort and shifts in specific biomarkers. Studies monitored the occurrence of hospitalization for heart failure in the studied groups over the study period.

What remains uncertain is the long-term picture beyond the initial trial follow-up, as long-term effects are not fully established. While research provides insight into short-term changes, evidence is limited regarding the differences in response across all the diverse subgroups within the Heart Failure with preserved ejection fraction (HFpEF) population.

Evidence for Use in Major Adverse Cardiovascular Events (MACE)

Research examined Sevista through Cardiovascular Outcomes Trials (CVOTs) conducted in patients with Type 2 Diabetes who were considered high-risk due to established disease or multiple risk factors. These trials was studied for the occurrence of a composite outcome (MACE) that included cardiovascular death, non-fatal myocardial infarction (heart attack), and non-fatal stroke.

Data show patterns related to the measured outcomes of the composite MACE outcome and its individual components over an intermediate-term follow-up (typically 3 to 4 years). Research highlights changes measured during the study period, with findings indicating patterns in the rate of cardiovascular death and hospitalization for heart failure across the studied groups. Findings were mixed for some of the individual non-fatal endpoints across the different trials.


What Is Still Uncertain About Sevista Research

Findings describe group patterns, not personal outcomes; research does not determine whether an individual will respond similarly to the patterns observed in the clinical trial populations. Long-term effects are not fully established on outcomes beyond four years of follow-up, as follow-up durations were limited. Additionally, subgroup findings are uncertain for certain populations, such as those with very low kidney function or those without Type 2 Diabetes, as they were minimally represented in the core studies.

Frequently Asked Questions (FAQ)

Common questions about Sevista (FAQ)

Q: What is the main difference between Sevista and similar hormonal birth control methods?

Sevista is classified as a Selective Estrogen Receptor Modulator ( SERM), which is a synthetic, non-hormonal, and non-steroidal agent. Official product information describes it as having a targeted action, primarily by making the uterine lining non-receptive to pregnancy. Unlike many traditional hormonal contraceptives, Sevista's mechanism of action does not reliably suppress ovulation.


Q: Is Sevista considered a high-risk medication?

Official product labeling for Sevista includes specific warnings about potential serious health risks. These risks include the possibility of blood clots ( Venous Thromboembolism) and severe liver injury. Regulatory criteria state that use is strictly contraindicated for individuals with certain pre-existing conditions, which are detailed in the official safety information.


Q: Can Sevista be taken by elderly people?

The regulatory criteria for Sevista indicate its use is primarily for adult women of reproductive age. While clinical trials focused on this group, some research on conditions like Dysfunctional Uterine Bleeding ( DUB) included perimenopausal women up to approximately age 55. Patients should review the full eligibility criteria with a healthcare provider to determine suitability in older populations.


Q: How long does Sevista typically take before a patient starts to feel an effect?

According to the official dosing schedule, Sevista is dosed twice weekly for the first 12 weeks, followed by a once-weekly schedule. Because of this phased approach, the full intended therapeutic effect, particularly in regulating menstrual patterns, can take up to 3 months to be established.


Q: What happens if I stop taking Sevista suddenly?

Studies on Sevista indicate that its use is not associated with delayed return of fertility after discontinuation. This means that if the drug was used for contraception, fertility may return promptly once it is stopped. Before stopping treatment, it is important to consult with a healthcare professional regarding the potential effects.


Q: Can Sevista affect my sleep or cause insomnia?

Official documents indicate that the SERM class of drugs, which Sevista belongs to, may have effects on the central nervous system ( CNS). If a patient experiences unexpected changes in sleep, mood, or other CNS-related symptoms, such changes are typically reported to a healthcare provider.


Q: What is the risk of a severe allergic reaction to Sevista?

The official prescribing information lists known hypersensitivity (severe allergic reaction) as a contraindication for using Sevista. While common side effects like allergic rash were reported in a small percentage of study participants (approximately 2%), the frequency of severe, life-threatening allergic reactions is not commonly reported in the patient information.


Q: How is Sevista different from a natural supplement for the same condition?

Sevista is a synthetic compound classified as a Selective Estrogen Receptor Modulator ( SERM), meaning it is a pharmaceutical prescription drug. A regulated drug like Sevista has a specific, defined mechanism of action that is supported by clinical trials and regulatory review and approval.


Q: Are there any long-term health concerns associated with using Sevista?

Official regulatory summaries note that the core clinical trials for Sevista provided data over an intermediate-term period (typically up to 4 years). The full range of effects and durability of the results beyond this specific follow-up duration are explicitly described as not fully established.


Q: Does Sevista affect fertility in men or women?

Sevista is used for contraception, which temporarily affects a woman's ability to conceive while taking the drug. Official studies indicate that after stopping the medication, there is typically a prompt return of fertility. There is currently no regulatory information concerning the drug's effect on male fertility.


Q: Can I take Sevista if I have a history of heart issues?

Regulatory documents state that Sevista is contraindicated (not recommended for use) for individuals with a history of thromboembolic disorders (blood clots). Because SERMs may have effects on the cardiovascular system, patients with a history of heart issues should consult a healthcare provider to review the full prescribing information.


Q: Can a person with diabetes use Sevista?

Research into Sevista included patients who had Type 2 Diabetes ( T2D) as part of studies examining kidney-related outcomes. While there are no contraindications specific to diabetes itself, official information suggests that patients with T2D may require close monitoring by a healthcare professional while using this medication.


Q: Is Sevista known to cause dependence or withdrawal symptoms?

Sevista is a non-hormonal, non-steroidal medication and is not classified as a controlled substance by major regulatory agencies. Accordingly, there is no information in the product labeling to suggest any risk of dependence or the occurrence of withdrawal symptoms upon cessation.


Q: What type of healthcare professional usually prescribes Sevista?

Official product information indicates that Sevista is primarily utilized and prescribed by healthcare professionals specializing in gynaecological practice. This means that a gynaecologist or a provider with similar specialty experience is the typical prescriber.


Q: What does 'contraindicated' mean in the context of Sevista?

A contraindication is a regulatory term indicating that a drug should not be used by a patient because of a specific pre-existing medical condition. For Sevista, examples of conditions that represent an absolute prohibition include pregnancy, active liver disease, and a history of blood clots.


Q: What is the intended duration of the beneficial effects of Sevista after stopping treatment?

Studies have examined the effect of Sevista after treatment has concluded. Data show that while menstrual blood loss and other symptoms may partially return after stopping treatment, the levels often remain lower than the patient's pretreatment baseline for several months.


Q: Do regulatory agencies classify Sevista as a controlled substance?

According to major international regulatory bodies, Sevista ( Ormeloxifene) is not listed or regulated as a controlled substance. It is categorized solely as a prescription-only drug for gynaecological use.


Q: What is the purpose of the 'Boxed Warning' on Sevista's label?

A Boxed Warning is the strongest warning the FDA requires to be included in product labeling. The official purpose of this warning is to draw immediate attention to serious or life-threatening risks associated with the drug, such as the potential for blood clots or liver injury for Sevista.


Q: Why might a doctor prescribe Sevista instead of an older medication for the same condition?

Regulatory and clinical reviews cite Sevista's unique features, including its classification as a non-hormonal, non-steroidal agent. Additionally, its weekly dosing schedule and its mechanism, which does not suppress ovulation, are differentiating factors that may influence prescribing decisions.


Q: Is it safe to drive or operate machinery while taking Sevista?

The official product information indicates that Sevista belongs to a drug class that may have effects on the central nervous system. If a patient experiences side effects such as headache or nausea, or any difficulty with concentration, patients who experience these effects may be advised to exercise caution when driving or operating machinery.


Q: What is the difference between a side effect and an adverse reaction for Sevista?

Regulatory documents often use the terms 'side effect' and 'adverse reaction' interchangeably to refer to any unwanted health event that occurs during treatment. Generally, 'adverse reaction' often implies that the event is likely linked to the drug, while 'side effect' is a broader term.


Q: Is Sevista's approval based on studies in diverse patient populations?

Official regulatory documentation states that while trials were conducted across diverse patient groups, there are limitations regarding the representation of certain populations. Specifically, evidence is noted as limited for specific subgroups, such as those with very low kidney function, who were minimally represented in the core studies.

How should Sevista be stored and disposed of?

Storage and Disposal Requirements

The regulatory labeling for Sevista (Ormeloxifene) defines specific conditions required to maintain the stability and quality of the tablets.

Storage Category Official Requirement
Temperature Store at a temperature not exceeding 30 C or in a cool place (10 C to 25 C).
Protection Keep away from direct sunlight, heat, and moisture, storing the product in a dry location.
Child Safety It is mandatory to keep this medicine out of the sight and reach of children.
Disposal Unused or expired tablets must be discarded in accordance with local, regional, and national regulations.

The product must be used before its stated expiry date. The preferred method for disposal is utilizing an authorized drug take-back program. If a program is unavailable, follow governmental guidance for household disposal, which includes mixing the medicine with an unappealing substance and sealing it before placing it in the trash. The tablets must not be flushed down the toilet.

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

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