Gynera

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Gynera

Medically reviewed

Rosario Oropesa

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 Gynera

Quick Facts

Property Description
Active ingredients Ethinyl Estradiol and Gestodene
Form Coated Tablet
Pharmacological class Combined Oral Contraceptive (COC)
Common use Hormonal Regulation
Origin Synthetic Steroid

What Type of Medicine is Gynera? (Classification and Form)

Gynera is fundamentally defined as a synthetic steroidal contraceptive belonging to the class of combined oral contraceptives (COCs) and is characterized as a progestogen and oestrogen fixed combination. It is supplied as a coated tablet designed for oral administration, and the specific inclusion of Gestodene categorizes this formulation as a third-generation oral contraceptive. This generation is distinguished by its use of a progestogen compound developed more recently than those found in older formulations, a feature associated with providing effective cycle control.

Composition: Ethinyl Estradiol and Gestodene

The formulation is a fixed-dose combination product containing two active pharmaceutical ingredients: Ethinyl Estradiol (the synthetic estrogen) and Gestodene (the synthetic progestogen). Ethinyl Estradiol serves to stabilize the endometrial lining and support the overall effectiveness of the combination. Gestodene is the potent progestogen component that is primarily responsible for the core biological effect. This precise pairing is a distinctive feature of the Gynera formulation. Both actives are synthetic derivatives of natural hormones, formulated within a solid matrix that utilizes common tablet excipients, such as lactose and sucrose.

General Purpose: Hormonal Regulation

The primary purpose of this medicine is to provide hormonal regulation to act as a contraceptive agent for women of reproductive age. This function is achieved by introducing steady levels of the two synthetic hormones, which suppress the body's natural processes required for fertility. The continuous and predictable supply of this specific combination establishes control over the woman's reproductive cycle, which is fundamental to its general use in a typical scenario requiring ongoing hormonal contraceptive support.

Regulatory References

  1. Oral Contraceptive Pills - NCBI Bookshelf (NIH)

What side effects are possible with Gynera?

The official safety profile of Gynera, a combined oral contraceptive containing Ethinyl Estradiol and Gestodene, is organized by the frequency and type of documented adverse reactions, strictly based on government regulatory labeling.

Documented Adverse Reactions

The most frequent adverse reactions are generally related to hormonal adjustment. These are categorized in regulatory documents:

Classification Examples (System-Organ Class)
Common (up to 1 in 10 users) Headache, Nausea, Vomiting, Breast pain/Tenderness, Breakthrough bleeding or Spotting, and Weight increased.
Uncommon Migraine, Fluid retention (Edema), Chloasma (skin discolouration).
Rare (less than 1 in 1,000 users) Venous Thromboembolism (VTE), Arterial Thromboembolism (ATE), and Hypersensitivity.

Serious Adverse Reactions and Safety Constraints

The most critical risks documented in the official labeling are Venous Thromboembolism (VTE), which includes Deep Vein Thrombosis (DVT) and Pulmonary Embolism (PE), and Arterial Thromboembolism (ATE), which includes Stroke and Myocardial Infarction. These serious risks are classified as rare.

Risk assessment notes that the highest VTE risk occurs during the first year of use or upon re-initiation after a break of four weeks or more. Furthermore, the medicine is restricted in individuals with a history of thromboembolic disorders, certain sex-steroid influenced malignancies (e.g., breast cancer), or severe hepatic disease until liver function normalizes. A contraindication also applies to use with certain concomitant Hepatitis C treatments, as noted in the official prescribing information.

Overdose and Emergency Response

Overdose with combined oral contraceptives like Gynera (ethinylestradiol and gestodene) rarely causes serious, life-threatening symptoms. Due to the low toxicity of the components, even the ingestion of multiple tablets is generally not associated with severe harm.

Potential Overdose Symptoms

The most common symptoms reported following an overdose are typically mild and may include:

  • Nausea and Vomiting: Often the earliest signs.
  • Breast Tenderness: A temporary increase in sensitivity.
  • Vaginal Bleeding: Withdrawal bleeding may occur several days later, particularly in young females.

When to Seek Medical Help

While severe complications are uncommon, you should contact a healthcare provider or a poison control center immediately if you suspect a Gynera overdose. This is essential for guidance and to rule out other medical issues, especially if the quantity taken was significant or if the person is a child.

Seek immediate emergency medical attention if you experience any signs of a serious adverse event, such as:

  • Sudden, severe chest pain or shortness of breath (possible blood clot).
  • Sudden, severe headache or vision changes (possible stroke).
  • Unexplained swelling or pain in one leg (possible deep vein thrombosis).
  • Signs of a severe allergic reaction (e.g., swelling of the face, tongue, or throat; hives with difficulty breathing).

Therapeutic Uses of Gynera

What Gynera Treats: Main Uses and Benefits

The core utility of Gynera is its dual capacity for pregnancy prevention and providing systemic therapeutic benefit across challenging gynaecological and hormonal symptom domains. The product is primarily indicated for oral contraception and is applied in the management of conditions marked by recurring, disruptive symptom patterns.


Contraception, Cycle Stability, and Symptom Relief

This medication is generally used to provide reversible contraception for women of reproductive age. This medicine generally assists with achieving cycle stability, offering the key benefit of scheduled, predictable menstrual bleeding and assisting with overall patient planning. It is commonly used for managing symptom clusters that interfere with daily comfort, specifically chronic menstrual pain (dysmenorrhea), heavy bleeding (menorrhagia), and hormonally driven issues like acne and hirsutism.

By assisting with symptom stabilization, it contributes to easing the overall symptom load, supporting the patient during episodes of heightened discomfort that interfere with daily functioning. The overall therapeutic approach is relevant for easing symptoms that interfere with daily comfort.


Quick Fact: Therapeutic Focus
Cyclical Discomfort

Regulatory References

  1. EMA Public Assessment Report for Gestodene/Ethinylestradiol

Eligibility and Restrictions for Use

Eligibility Scope

The official eligibility profile for Gynera (Ethinyl Estradiol and Gestodene) is strictly defined by regulatory authorities, primarily focusing on minimizing risks associated with its hormonal components.

Category Official Regulatory Statement
Populations for whom use is allowed: Women of reproductive age who have undergone menarche (first menses) [EMA SmPC].
Populations for whom use is contraindicated: Individuals with a current or history of Venous or Arterial Thromboembolism (VTE/ATE) or known hereditary predisposition for blood clots. This includes severe conditions such as migraine with focal neurological symptoms, severe diabetes with vascular damage, or uncontrolled hypertension [Bayer Package Leaflet].
Condition-specific eligibility rules: Use is contraindicated in patients with severe liver disease, liver tumors, or hormone-dependent malignancies [EMA SmPC]. Contraindication also applies to those requiring prolonged immobilization from major surgery [EMA SmPC].
Pregnancy and lactation eligibility status: Contraindicated during known or suspected pregnancy. Use is not recommended during breastfeeding [Bayer Package Leaflet].

Eligibility Classifications

Official labeling establishes Contraindicated status for populations presenting high vascular, thrombotic, or hepatic risks, while use is indicated only for women of reproductive potential (i.e., not indicated for pre-menarche or postmenopausal women) [MHRA SmPC].

What should I know about interactions with other medicines?

The interaction profile for Gynera is defined by documented regulatory restrictions and changes in hormonal plasma concentration resulting from co-administration.

Interaction Classification Interacting Agents Official Regulatory Description
Contraindicated Combinations Hepatitis C Viral Regimens Co-administration is formally prohibited with combinations containing Ombitasvir / Paritaprevir / Ritonavir / Dasabuvir, Glecaprevir / Pibrentasvir, or Sofosbuvir / Velpatasvir / Voxilaprivir.
Exposure Reduction Enzyme Inducers / Herbal Products Medicinal products such as Rifampicin and certain Anticonvulsants, along with the herbal product St. John’s wort, are documented to decrease hormone plasma concentrations through hepatic enzyme induction.
Exposure Increase CYP3A4 Inhibitors / Non-Medicinals Strong CYP3A4 inhibitors (e.g., Itraconazole) may increase hormone exposure. Non-medicinal substances, including Grapefruit juice and Ascorbic acid, are also documented to increase Ethinyl Estradiol plasma levels.

These constraints establish the official interaction structure based on both pharmacokinetic mechanisms and direct prohibitions. The formal contraindication with the Hepatitis C antivirals is based on the inhibitory effect of these regimens on multiple drug transporters (e.g., OATP1B1, BCRP) and enzymes, leading to a documented risk of elevated liver enzymes. Separately, the oral contraceptive is documented to increase the plasma concentrations of certain co-administered drugs like Tizanidine. The regulatory labeling also specifies that hormonal absorption may be compromised if significant gastro-intestinal upset occurs within four hours of taking the tablet.

Mechanism of Action

How Gynera Works

Gynera exerts its pharmacodynamic effects through a combination of two synthetic hormones, ethinylestradiol and gestodene, which act as agonists at intracellular steroid hormone receptors in target tissues. This foundational molecular action primarily modifies key pathways within the female reproductive axis.

Pituitary-Ovarian Axis Modulation

The hormones exert a sustained negative feedback effect on the hypothalamic-pituitary-ovarian (HPO) axis). This action suppresses the synthesis and release of the pituitary gonadotropins, Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH). The resulting cascade prevents both follicular maturation and the characteristic mid-cycle LH surge.

Peripheral Tissue Effects

In peripheral tissues, gestodene induces structural changes. It promotes an increase in cervical mucus viscosity, which reduces the permeability of the cervical canal to sperm transport. Concurrently, the hormonal action causes endometrial transformation characterized by stromal decidualization and glandular atrophy.

Dosage and Administration Information

Instruction Map: How to use Gynera — Administration Guidelines

This section describes the administration procedures for Gynera (Ethinyl Estradiol 30 mu g / Gestodene 75 mu g).


Administration Scope

Category Instruction
Route of administration Oral use only. The medicine is supplied as a Coated Tablet and must be swallowed whole.
Dosing schedule One active tablet daily for 21 consecutive days. The dose is fixed, supplying 30 mu g Ethinyl Estradiol and 75 mu g Gestodene.
Timing in relation to meals (if applicable) The tablet is taken at approximately the same time each day to maintain consistent hormone levels, regardless of meal timing.
Missed-dose rules If intake is delayed by more than 12 hours from the usual time, the last forgotten tablet must be taken immediately, and a non-hormonal barrier method must be used for the next 7 days.
Special procedural conditions The first course must commence on the first day of menstrual bleeding. Vomiting or severe diarrhoea occurring within four hours of intake necessitates the use of a barrier method for 7 days.

Instruction Classifications (High-Level)

Category Classification
Administration method type Oral
Frequency pattern Daily use in a 21/7 Cyclical pattern.
Use-context constraints Strict adherence to daily timing and the 21/7 cycle structure.

Resulting Procedural Structure

Step sequence:

  • Take one active tablet orally at the same time daily for 21 consecutive days.
  • Follow the 21-day course with a 7-day tablet-free interval.
  • Begin the next pack immediately after the 7-day interval is complete, irrespective of the cessation of withdrawal bleeding.

Connection to the overall use protocol: The instructions establish a fixed, time-dependent 21/7 cyclical regimen for administration. This highly structured protocol defines the time points for daily tablet intake and sets explicit rules for managing interruptions, such as delayed doses or gastrointestinal upset.

Recent Clinical Evidence

Research Evidence: Overview of Studies for Gynera (Ethinyl Estradiol/Gestodene)


Evidence for use in Contraception

Clinical research focuses on the medicine's evaluation for use in preventing pregnancy. Large-scale Randomized Controlled Trials (RCTs) and long-term observational studies were observed in to track pregnancy rates and monitor outcomes related to hormonal regulation. Findings describe patterns observed in the studies where low pregnancy rates were tracked over the study period, a measurement shared across the Combined Oral Contraceptive (COC) drug class. The effectiveness rates tracked in controlled clinical trials may differ from population-level outcomes, and research comparing this specific formulation against all other modern COCs is limited regarding differences in contraceptive outcomes.


Evidence for Non-Contraceptive Benefits and Hormonal Regulation

Research has also explored the evaluation of this combination in the context of symptoms linked to hormonal cycles, such as chronic menstrual pain (dysmenorrhea) and skin manifestations.

Research on Cycle Stability and Predictability: Studies monitored the regularity of withdrawal bleeding and the incidence of unscheduled bleeding. Reports describe tracked bleeding patterns over time, and the research contributes to understanding changes in cycle predictability.

Research on Chronic Menstrual Pain: Studies examined outcomes related to physical discomfort. Research reports describe how subjective pain scores were measured over the observation period, consistent with findings across the COC class. Evidence quality varies, and research focused on differences between this specific formulation and other modern COCs is often not fully established.

Research on Hormonally Driven Symptoms (Acne and Hirsutism): Studies were observed in women with symptoms like mild-to-moderate acne. Research examined outcomes related to skin manifestations and hair growth. Observations of specific physical manifestations often required follow-up periods of several months before being fully described in the literature. Comparative evidence is often lacking for a definitive advantage over every other low-androgenic COC.


Long-Term Research and Study Duration

The evidence base includes intermediate-term clinical trials typically following subjects for about one year. Long-term outcomes related to the durability of the pharmacological effects are not fully established through specific multi-year RCTs for this combination alone. Information for long-term outcomes is often derived from extensive observational settings evaluating daily-life functioning and large epidemiological studies that include the entire class of COCs.

Frequently Asked Questions (FAQ)

Common questions about Gynera (FAQ)

Q: Is Gynera used for more than just birth control?

A: The primary official use of this medicine is contraception (preventing pregnancy). Studies and authorized documentation also indicate that this combination of hormones may be used to address hormonally-related issues, such as severe menstrual pain (dysmenorrhea) and specific skin conditions like acne.


Q: Are there common reasons why a doctor might prescribe Gynera instead of other pills?

A: This medicine is classified as a third-generation combined oral contraceptive due to the specific type of progestogen hormone it contains, known as Gestodene. Regulatory documentation notes that this particular formulation is recognized for providing effective and predictable cycle control, which may be a factor in prescribing decisions.


Q: Is weight gain a reported side effect of Gynera?

A: Yes, official safety information lists an increase in body weight as a Common adverse reaction. This means that based on clinical data, this effect may be observed in up to 1 out of 10 users.


Q: Does Gynera cause changes in mood or emotional state?

A: Official documentation notes that changes in emotional state are documented adverse reactions. This can include mood changes, mood swings, and depressed mood or depression during use. Patients are encouraged to discuss any changes they notice with their healthcare provider.


Q: How long do side effects typically last after starting Gynera?

A: For common hormonal side effects, such as breakthrough bleeding (spotting), official documentation suggests that these effects often diminish over time. Side effects frequently occur during the first three months as the body adjusts to the consistent hormone levels.


Q: Can Gynera be taken while breastfeeding?

A: Regulatory guidance advises that taking this medicine is not recommended while breastfeeding. This advisory is based on the fact that the hormones in the tablet can pass into the breast milk and may potentially affect the quality or quantity of milk production.


Q: Can Gynera be taken by people who have migraines?

A: Official prescribing information states that this medicine is contraindicated (prohibited) for individuals who experience a specific type of migraine called migraine with focal neurological symptoms (often called migraine with aura). This is due to an increased risk of stroke associated with the combination of this pill type and this specific migraine pattern.


Q: Can Gynera affect results on routine lab tests?

A: Official documents indicate that combined oral contraceptives may influence the outcomes of certain laboratory assessments, including tests for liver, thyroid, and adrenal function, as well as blood lipid profiles. Regulatory documents suggest informing laboratory staff of medication use before testing.


Q: How long after stopping Gynera does the menstrual cycle typically return to normal?

A: Studies on combined oral contraceptives suggest that fertility generally returns quickly once the medicine is stopped. Research indicates that fertility often returns within the first year after discontinuing the medicine, and a majority of women who wish to conceive do so within this period.


Q: Is it normal to have spotting or breakthrough bleeding while taking Gynera?

A: Yes, the official safety profile classifies spotting or breakthrough bleeding as a Common adverse reaction. This is frequently observed by users, particularly when starting the medicine, which aligns with its classification as a Common effect.


Q: Are there different dosages or strengths of Gynera available?

A: The medicine is generally described in regulatory documents as a fixed-dose combination containing 30 mu g of Ethinyl Estradiol and 75 mu g of Gestodene in each active tablet. Other dosage strengths of the specific Gynera brand name are not commonly listed in major regulatory databases.


Q: Are there any dietary restrictions mentioned in the official information for Gynera?

A: Official drug documents detail specific non-medicinal interactions, noting that certain substances can potentially increase the blood levels of the Ethinyl Estradiol component. Specifically, Grapefruit juice and Ascorbic acid are listed as agents documented to have this effect.


Q: Does the official information recommend taking Gynera with food?

A: The official administration instructions specify that the tablet must be taken at the same time each day, but state this should be done regardless of meal timing. There is no general regulatory recommendation that the tablet must be taken with food.


Q: Are there any known issues with taking Gynera and having surgery?

A: Yes, official guidance strictly contraindicates the use of this medicine for patients facing major surgery or any situation requiring prolonged immobilization. This is due to the potential for an increased risk of developing blood clots, and official guidance notes that the medicine may require temporary cessation prior to such procedures.


Q: Can Gynera affect my libido or sex drive?

A: Changes in sexual desire are a documented adverse reaction associated with hormonal contraceptives. Official labeling reports both an increase or decrease in libido (sex drive) in some users.


Q: Can Gynera be used to regulate irregular periods?

A: The primary purpose is preventing pregnancy, which is achieved by imposing a regular, controlled cyclical bleeding pattern. While the medicine establishes predictable withdrawal bleeding, it is not typically indicated solely for the purpose of treating underlying irregular menstrual periods.


Q: Is it possible for Gynera to stop my period completely?

A: The typical 21/7 administration cycle is designed to allow for predictable withdrawal bleeding during the seven-day hormone-free interval. Official warnings note that missed periods (amenorrhea) can occur, which may require medical investigation, especially if doses were missed.


Q: How is Gynera packaged (e.g., 21-day pack, 28-day pack)?

A: The medicine is typically supplied in a blister pack containing 21 active tablets. This packaging aligns with the official dosing schedule, which requires taking 21 tablets followed by a 7-day interval with no tablets before starting the next pack.


Q: What are the official success rates of Gynera for preventing pregnancy?

A: Official regulatory information typically assesses success using the Pearl Index, which measures the failure rate. Clinical studies consistently describe a high level of effectiveness, tracking low pregnancy rates when the medicine is used strictly as directed in the prescribing information.


Q: Can Gynera increase the risk of certain types of cancer?

A: Official labeling includes warnings about a slightly increased risk of certain conditions, such as breast cancer and liver tumors. Conversely, studies have suggested a potential reduction in the risk of ovarian and endometrial cancers associated with the use of combined oral contraceptives.


Q: Does official guidance state that Gynera must be taken at the exact same time every day?

A: The guidance specifies taking the tablet at approximately the same time each day to maintain steady hormone levels. Regulatory guidance on effectiveness states that the contraceptive effect is maintained provided the delay in taking the dose is not more than 12 hours past the usual time.


Q: Are there generic versions of Gynera available?

A: The specific hormone combination in Gynera, which contains Ethinyl Estradiol and Gestodene, is marketed under multiple brand names in different regions. This suggests that generic equivalents containing the same active ingredients are available in many global markets.


Q: What are the risks if I am accidentally pregnant when I start taking Gynera?

A: The medicine is contraindicated if pregnancy is known or suspected. However, regulatory documentation generally states that if the medicine was taken unintentionally during the very early stages of pregnancy, most studies suggest no increased risk of birth defects.


Q: Does alcohol consumption impact the safety or effectiveness of Gynera?

A: Official documentation does not report a direct chemical interaction between alcohol and the medicine that reduces its effectiveness. However, excessive alcohol use that leads to vomiting within four hours of taking the tablet may compromise hormone absorption, and this scenario is covered under the official missed-dose guidance.

How should Gynera be stored and disposed of?

How to Store and Dispose of Gynera?

The official storage and disposal requirements for Gynera tablets are defined by regulatory authorities to ensure product stability and environmental safety.

Requirement Regulatory Mandate
Maximum Temperature Do not store above 30 C to maintain the 24-month shelf-life.
Protection Store in the original package to protect the tablets from moisture.
Child Safety Keep the medicine out of the sight and reach of children (mandatory instruction).
Disposal Dispose of unused or expired medicine according to local regulations.

Disposal must be managed to prevent environmental contamination; therefore, the product must not be disposed of in wastewater or general household waste unless local guidelines specifically permit it. The medicine is not classified as an additional environmental hazard during disposal.

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

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