Belarina

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Belarina

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Belarina

Property Description
Active ingredient Chlormadinone acetate, Ethinyl Estradiol
Form Film-coated tablet
Pharmacological class Combined hormonal contraceptive
Common use Pregnancy prevention
Origin Synthetic hormone derivatives

Belarina is a prescription-only pharmaceutical preparation, formally classified as a Combined Hormonal Contraceptive (CHC), which is an established, systemic method of hormonal contraception. The drug is structurally defined as a monophasic oral formulation, where each active film-coated tablet contains a consistent, fixed dosage of the hormone components.

Identity and Pharmacological Classification of Belarina

This medication belongs to the pharmacological class of estrogen and progestogen combinations, which function by introducing synthetic hormone derivatives to regulate the female reproductive cycle. This drug contains the specific combination of chlormadinone acetate and ethinyl estradiol. This combination is used for achieving contraceptive control.

Composition: Active Ingredients and Antiandrogenic Profile

The core composition of Belarina includes two synthetic hormone derivatives: Ethinyl Estradiol (EE), serving as the estrogen component, and Chlormadinone acetate (CMA), providing the progestogen activity. The Chlormadinone acetate confers antiandrogenic properties to the preparation. This characteristic differentiates the drug's overall pharmacological profile within the landscape of combined pills. The final dosage form is an oral film-coated tablet, a common and convenient route of administration.

Primary Purpose: Pregnancy Prevention

The general purpose of Belarina is to achieve pregnancy prevention for women of childbearing potential. This drug's classification and composition are dedicated to providing hormonal contraception for use in general family planning. The combined action of the two synthetic hormones facilitates a contraceptive effect through multiple, synergistic physiological actions, serving its primary function as a means of pregnancy prevention.

Regulatory References

  1. European Public Assessment Report (EPAR)
  2. Types of Combined Oral Contraceptive Pills (NHS)
  3. NIH Basics of Clinical Trials
  4. Endocrine Hormones (NCBI)

What side effects are possible with Belarina?

Possible Side Effects and Safety Information

Official regulatory documents categorize the possible side effects of this combined hormonal contraceptive based on frequency and the body systems affected. These categories are derived from clinical trials and ongoing safety monitoring, and they define the medicine's formal risk profile. The information remains strictly non-instructional and non-advisory, focusing on documented regulatory classifications.


Frequency-Classified Adverse Reactions

Adverse reactions are classified by incidence rates reported in regulatory documentation:

  • Common Reactions (occurring in at least 1 in 100 people): Include headache, migraine, nausea, breast tenderness, and changes in mood such as depressed mood.
  • Bleeding Irregularities: Intermenstrual bleeding (spotting/breakthrough bleeding) is a commonly documented effect, often being more frequent during the initial treatment cycles.

Serious Adverse Reaction Profile

The most clinically significant risks formally associated with this class of medication involve vascular and neoplastic events. These are considered rare but serious:

  • Thromboembolic Events: An increased risk of Venous Thromboembolism (VTE), which includes Deep Vein Thrombosis (DVT) and Pulmonary Embolism (PE), and Arterial Thromboembolism (ATE), such as stroke or myocardial infarction, is officially documented. The risk of VTE is highest during the first year of use.
  • Neoplasms: The label notes an association with hormone-sensitive cancers (e.g., breast cancer) and a very rare, dose- and duration-dependent risk of Meningioma associated with the progestin component.

Safety Considerations and Restrictions

Safety labeling outlines specific constraints and populations requiring caution:

  • Hepatic Restriction: The medicine is formally contraindicated in women with severe liver disease or liver tumors, and its use is restricted when co-administered with certain Hepatitis C combination regimens due to the risk of liver enzyme elevation.
  • Population Notes: Women prone to chloasma (skin pigmentation) are advised in the label to minimize sun/UV exposure. Specific monitoring is also noted for women with diabetes or prediabetic conditions due to potential effects on carbohydrate and lipid metabolism.

Overdose and Emergency Response

Overdose and when to seek help

Category Official Regulatory Statement
Documented Overdose Manifestations Nausea, vomiting, headache, and withdrawal bleeding in females are the most commonly documented signs of acute exposure.
Severity Classification Overdose is classified as having low acute toxicity, and no serious or life-threatening outcomes are typically expected from the active ingredients alone.
Emergency Help-Seeking Seek immediate medical attention for any suspected overdose. Contact a healthcare provider or emergency services for advice and evaluation.
Management Principle Treatment for overdose is symptomatic and supportive. No specific antidote is known for this combination of hormones.
Population-Specific Note Withdrawal bleeding is a documented manifestation expected to occur, even in pre-pubertal females who have ingested the drug.

An acute overdose of Belarina is generally considered by regulatory authorities to be associated with low systemic toxicity, meaning serious adverse effects are not expected. However, any suspected ingestion exceeding the prescribed amount necessitates immediate action. The officially documented clinical manifestations primarily involve the gastrointestinal system, such as nausea and vomiting, and the female reproductive system, resulting in withdrawal bleeding. When overdose is suspected, contacting emergency services or a poison control center is the required first action. Clinical management in an overdose setting is focused on supportive care because regulatory information confirms that no specific antidote is available. Medical observation may be required to manage any persistent symptoms.

Therapeutic Uses of Belarina

Belarina is commonly used to help with symptoms related to systemic imbalance, specifically those that interfere with daily functioning across two key therapeutic domains. The medication is relevant in contexts where additional symptomatic support is appropriate, applied across domains where increased discomfort or tension may be present, including those relevant to gynecological disorders and certain distressing symptoms.

Symptomatic Management

The medication is relevant for easing symptom clusters that may become intense or disruptive, such as those associated with androgen-driven manifestations like moderate-to-pronounced acne and excessive oiliness (seborrhea). It is commonly used across conditions presenting with systemic or localized discomfort. This supportive relief may assist with maintaining functional stability and supports the patient during episodes of heightened discomfort.

Relief for Acute Menstrual Discomfort

Belarina is used for managing symptoms that create physiological strain, such as painful periods (primary dysmenorrhea). It is relevant in situations requiring short-term symptomatic assistance, especially during phases when symptoms become more noticeable. This supports the patient during difficult episodes by easing distress and helps improve day-to-day comfort during symptomatic periods.

Quick Fact: Relevant for Symptom-Driven Clinical Presentations (The medication supports general well-being during symptomatic phases by helping to ease the overall symptom load related to these issues.)

Eligibility and Restrictions for Use

Official Eligibility Profile

Belarina (Ethinylestradiol/Chlormadinone acetate) is for use in women of reproductive age who do not have specific contraindications. Use is generally not established in pre-menarcheal females or post-menopausal women.


Classification Population/Condition
Contraindicated Current or history of venous or arterial thromboembolism (e.g., DVT, stroke, MI), or known thrombophilia (clotting disorder).
Contraindicated Specific high-risk cardiovascular conditions: severe hypertension, diabetes mellitus with vascular symptoms, or migraine with focal neurological symptoms.
Contraindicated Current or history of severe hepatic disease (liver disease) or liver tumours.
Contraindicated Known or suspected sex-steroid-dependent malignancies (e.g., breast or genital cancers).
Contraindicated Pregnancy and is not recommended during breastfeeding (lactation).
Conditional Use Women with certain risk factors for thrombosis (e.g., obesity) or with certain chronic inflammatory diseases (e.g., Crohn's disease)—requires careful regulatory assessment.

Official government documents strictly prohibit use when these specific conditions or physiological statuses are present, as defined in the product's official labeling.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official interaction profile for Belarina is defined by documented pharmacokinetic and pharmacodynamic interactions with other substances, based on regulatory prescribing documentation.

Prohibited Combinations (Contraindicated)

Co-administration with certain Hepatitis C virus treatment regimens is formally contraindicated. These prohibited combinations include regimens containing ombitasvir, paritaprevir/ritonavir, with or without dasabuvir, or combinations of glecaprevir/pibrentasvir, or sofosbuvir/velpatasvir/voxilaprevir. The restriction is necessary due to the officially documented risk of significant elevations in liver enzymes (ALT levels) when taken concurrently with this combined hormonal contraceptive.

Exposure-Altering Interactions

The effectiveness of Belarina may be affected by drugs or products that interact with metabolic pathways.

  • Enzyme Inducers (e.g., CYP3A4 inducers), which include certain medicinal products and enzyme-inducing herbal products such as St. John's Wort, are documented to cause a pharmacokinetic interaction that reduces the exposure of the hormonal components. This effect may lead to a decrease in contraceptive effectiveness and increased breakthrough bleeding.
  • Conversely, Enzyme Inhibitors decrease the clearance of the hormones, resulting in an increase in plasma concentrations.

Timing Requirement

Following the completion of treatment with any of the contraindicated Hepatitis C regimens, regulatory guidelines mandate that Belarina can only be restarted after a strict two-week separation period.

Mechanism of Action

How Belarina Works (Mechanism of Action)

Belarina functions as an antagonist selective for the IL-17RA receptor subunit. This antagonism occurs through binding to the receptor, thereby blocking the interaction and downstream signaling normally initiated by the IL-17A and IL-17F cytokines.

The cessation of ligand binding leads to the attenuation of intracellular signaling cascades, including the downstream activation of the NF-kappa B transcription factor and MAPK pathways. This pathway modulation results in a decreased transcriptional drive for pro-inflammatory mediators. The intracellular consequences include a measurable reduction in the expression of matrix metalloproteinases ( MMPs), particularly MMP-3 and MMP-13, and various chemokines and cytokines at the cellular level. This collective molecular consequence represents a modulation of the immune-inflammatory response system.

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Dosage and Administration Information

How to Use Belarina

The standard method of use for Belarina involves the oral use of one film-coated tablet daily. Each tablet must be taken at approximately the same time each day, and the tablets must be swallowed whole, with or without fluid. This routine establishes a 28-day cycle, typically consisting of 21 active (hormone-containing) tablets followed by 7 inactive or hormone-free days, depending on the pack format.

Starting the Tablet Cycle

Tablet-taking must begin on Day 1 of the menstrual cycle (the first day of menstrual bleeding). If starting between Day 2 and Day 5, an additional non-hormonal barrier method must be used during the first seven days of active tablet-taking.

Rules for a Missed Tablet

If an active tablet is missed by less than 24 hours, it should be taken immediately, and subsequent tablets should be taken at the usual time; no additional precautions are necessary. If an active tablet is missed by more than 24 hours, the effectiveness may be reduced, and the procedural steps depend on the week of the cycle:

Cycle Week Required Action (if >24 hours late)
Week 1 (Days 1–7) Take last missed tablet immediately. Use additional non-hormonal precautions for the next 7 days of uninterrupted active tablet-taking.
Week 2 (Days 8–14) Take last missed tablet immediately. No additional precautions are needed, provided tablets were taken correctly for the 7 days prior.
Week 3 (Days 15–21) Take last missed tablet immediately and discard the hormone-free interval/placebo tablets to immediately start a new pack, OR discontinue the current pack and begin the hormone-free interval (including missed days) before starting a new pack.

If severe vomiting or diarrhea occurs within three to four hours after taking an active tablet, it must be treated as a missed tablet, and a new replacement active tablet should be taken as soon as possible.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Belarina

Evidence for Contraceptive Efficacy and Cycle Control

Research for Belarina has primarily examined the setting of pregnancy prevention. This evidence is largely drawn from extensive, real-world post-marketing surveillance studies, which observe many women using the medication over intermediate- to long-term periods. These studies were used to monitor the rate of contraceptive failure, a metric often described using the Pearl Index, alongside monitoring how the medication affects the consistency of the menstrual cycle.

Studies monitored measurements related to cycle regularity. The evidence base contributes to understanding how the formulation influences the pattern of withdrawal bleeding. Research highlights the measured patterns of cycle consistency, with large observational cohorts describing the observed rates of unscheduled bleeding or spotting. However, it is important to note that these surveillance data reflect the group patterns observed under real-world usage, and individual outcomes may vary.

Evidence for Symptomatic Management of Acne and Seborrhea

Research has explored Belarina in the context of acne vulgaris through comparative study designs, specifically randomized controlled trials (RCTs). These trials were applied in research exploring short-term changes in skin condition, where the medication was studied against either a placebo or another combined hormonal contraceptive. Studies included populations of women presenting with mild-to-moderate androgen-driven skin manifestations.

The outcomes tracked in these studies were objective measurements, such as the change in the count of inflammatory lesions (papules and pustules), and global clinical assessments of acne severity. Research also examined secondary outcomes, such as skin oiliness (seborrhea), tracking changes in this outcome linked to inflammatory or irritative states. Evidence for skin oiliness is derived mainly from these secondary measures, and certainty remains low for this specific outcome compared to the more detailed metrics used for acne lesion counting.

Synthesis of Evidence Gaps and Future Research

Available research mostly involves observation periods lasting between six to twelve continuous treatment cycles. This provides a detailed understanding of the patterns observed over the intermediate-term use of the medication. The long-term durability of the patterns monitored—particularly for skin symptoms or patient discomfort—is not fully established across the full lifespan of use. Follow-up durations were limited in many symptomatic trials, which means that long-term effects are not fully established for tracking changes in symptoms. Furthermore, evidence quality varies across studies, with less objective or lower-powered data existing for secondary outcomes. The existing research provides context but not individual predictions, and findings reflect the specific conditions under which they were conducted.

Frequently Asked Questions (FAQ)

Common questions about Belarina (FAQ)

Q: What is Belarina typically prescribed for when used outside of its primary indication?

A: According to official regulatory documents, Belarina is primarily indicated for pregnancy prevention. Additionally, this medication is also specified for the symptomatic management of moderate acne vulgaris and seborrhea (excessive skin oiliness) in women who are also seeking an oral contraceptive.


Q: Is feeling more tired than normal a common side effect when first starting Belarina?

A: Official reports include unusual tiredness or general weakness (sometimes called fatigue or malaise) as a documented side effect. Although regulatory documents mention this possibility, they do not necessarily classify it among the most common adverse events.


Q: Do the side effects of Belarina generally decrease over time?

A: Official product information indicates that some common side effects, such as bleeding irregularities (spotting or breakthrough bleeding) and nausea, are often reported more frequently during the initial treatment cycles. This pattern is typically observed as the body adjusts to the medication, as documented in official prescribing information.


Q: Are there any known interactions between Belarina and common dietary or herbal supplements?

A: Official drug labels specifically note that the effectiveness of the hormones in Belarina may be reduced by certain enzyme-inducing herbal products. For instance, the use of St. John's Wort is documented to cause a pharmacokinetic interaction that could decrease contraceptive effectiveness and lead to increased unscheduled bleeding.


Q: Does Belarina affect mental state, such as causing mood changes or anxiety?

A: Official safety documents list changes to mental state, specifically depressed mood and anxiety, as reported adverse reactions. This type of effect is monitored through ongoing safety surveillance for this class of medication.


Q: Does Belarina require any form of routine monitoring, such as blood tests?

A: Official safety labeling indicates that women with diabetes or prediabetic conditions require specific monitoring while using Belarina. This caution is due to the potential effect of the medication on carbohydrate and lipid metabolism.


Q: What do the official clinical trials indicate about Belarina's effectiveness?

A: Clinical studies and ongoing surveillance support the effectiveness of Belarina for its primary purpose of pregnancy prevention. Research is also used to study and support its role in the symptomatic management of acne and seborrhea.


Q: Is weight gain listed as a potential side effect for Belarina?

A: Regulatory adverse reaction data indicates that weight gain and general weight fluctuations are among the reported side effects associated with the use of Belarina.


Q: Is it possible for Belarina to lose effectiveness after being used for a long period?

A: Official research overviews note that the long-term durability (persistence of effect) of patterns monitored has not been fully established, particularly for the skin symptoms assessed in some trials. However, the contraceptive effect is supported by post-marketing surveillance studies over intermediate- to long-term periods.


Q: Is Belarina available in a generic version, and is it the same as the brand name?

A: Belarina contains the active ingredients chlormadinone acetate and ethinyl estradiol. This specific combination of hormones is widely available under various brand and generic names in different markets. Generic versions contain the identical active ingredients as described in the official product information.


Q: Can Belarina be taken without food, or does it need to be taken with a meal?

A: The official administration guidelines state that the film-coated tablets should be swallowed whole. The medication can be taken with or without fluid, and is not required to be taken with a meal for administration.


Q: What should a patient do if they accidentally take more Belarina than usual?

A: Official regulatory documents describe that reported effects following an overdosage may include symptoms such as nausea and vomiting. In young females, this may also be followed by withdrawal bleeding.


Q: Why do some users on forums mention they experienced a change in their sleep patterns with Belarina?

A: Regulatory data from safety monitoring reports the occurrence of insomnia (difficulty sleeping) as a documented side effect for this class of medication. This can explain the experiences reported by some users.


Q: How long after stopping Belarina does it stay in the system?

A: Official pharmacokinetic data indicates how quickly the active ingredients leave the body. The half-life for chlormadinone acetate is approximately 34 hours, and for ethinyl estradiol it is about 26 hours. A half-life is the time it takes for half of the substance to be eliminated.


Q: What is the process for patients to report an adverse reaction to Belarina to a regulatory agency?

A: Official patient counseling information describes the process for reporting any suspected adverse reactions. This can be done by contacting the drug manufacturer directly, or by submitting a report to the relevant national regulatory authority's surveillance program.


Q: What is the rationale for the standard dosing schedule of Belarina?

A: The standard 21 active tablets followed by 7 inactive or hormone-free days is the typical regimen for combined oral contraceptives. This schedule is commonly described as designed to mimic a natural menstrual cycle and support withdrawal bleeding while providing hormonal contraception.


Q: Are there known long-term health risks associated with continuous use of Belarina?

A: Official regulatory safety documents note rare but serious risks, including an increased chance of thromboembolic events (blood clots) and an association with hormone-sensitive cancers. Research studies also indicate that the long-term durability of certain benefits, such as those related to skin symptoms, has not been fully established over the full lifespan of use.

How should Belarina be stored and disposed of?

Storage and Disposal Requirements

Official regulatory labeling dictates specific conditions for storing and disposing of Belarina film-coated tablets to ensure product stability and safety.

Storage Category Requirement
Temperature Do not store the product above 30 °C.
Container Keep the tablets in the original package.
Protection Store out of the sight and reach of children.

These storage controls are necessary to maintain the product's stability and labeled shelf-life. Any unused or expired medicinal product, including waste material, must be disposed of in accordance with local pharmaceutical requirements. Belarina tablets must not be thrown into household waste or disposed of via wastewater, as per environmental mandates.

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

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