Allestra

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Allestra

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 Allestra

What is Allestra? Identity and Purpose Overview

Property Description
Active Ingredients Ethinyl Estradiol (Estrogen) and Gestodene (Progestogen)
Form Oral Tablet
Pharmacological Class Combined Oral Contraceptive (COC), Sex-hormonal preparation
Common Use Contraception (Pregnancy Prevention)
Origin Synthetic

What is Allestra and What Pharmacological Class Does it Belong To?

Allestra is a synthetic hormonal combination product classified as a Combined Oral Contraceptive (COC). This medication is a prescription drug formulated as an oral tablet that is taken to prevent pregnancy. As a COC, Allestra belongs to the high-level pharmacological class of sex-hormonal preparations. Its combined formulation, which utilizes both an estrogen and a progestogen, is clinically recognized for achieving highly effective systemic contraception.


Composition: Ethinyl Estradiol, Gestodene, and Origin

The active ingredients in Allestra are Ethinyl Estradiol (EE) and Gestodene (GSD). Ethinyl Estradiol serves as the synthetic estrogen component, while Gestodene is the progestogen component, specifically classified as a third-generation progestin. Both active steroid components are synthetic in origin, developed for improved oral bioavailability. This specific Ethinyl Estradiol/Gestodene combination is the foundation for several established brands internationally, making the formulation widely known in medicine.


The General Purpose of Allestra

The primary and sole purpose of taking Allestra is for contraception, which is the reliable prevention of pregnancy. The synthetic estrogen and progestogen work together to provide a highly effective systemic approach to birth control. The mechanism primarily involves the suppression of ovulation, or the release of an egg, and secondary actions that inhibit fertilization. Combined contraceptives containing third-generation progestins like gestodene are characterized by high effectiveness, supporting its common use as a dependable option for adult women seeking routine birth control.

Regulatory References

  1. NIH: Oral Contraceptive Pills Mechanism

What side effects are possible with Allestra?

Official Regulatory Classification of Adverse Reactions

The safety profile of combined oral contraceptives (COCs), including formulations containing Ethinyl Estradiol and Gestodene, is established through official regulatory documentation. Adverse reactions are classified by frequency and the body system affected, based on data compiled from clinical studies and post-marketing surveillance.


System-Organ Classes and Associated Side Effects

Adverse reactions are formally grouped into System Organ Classes (SOC) as defined in regulatory standards. The highest frequency categories documented are:

  • Very Common (1/10): Reactions primarily involve the Nervous System and are classified as Headache.
  • Common (1/100 to < 1/10): Reactions are reported across the Reproductive System and Breast (e.g., breast pain, tenderness), Gastrointestinal Disorders (e.g., nausea, abdominal pain), and Psychiatric Disorders (e.g., mood changes, depressive moods), alongside weight increase.
  • Uncommon (1/1,000 to < 1/100): Documented reactions include vomiting, diarrhea, rash, urticaria, fluid retention, and a decrease in libido.

Documented Serious Adverse Reactions and Safety Patterns

Regulatory documents highlight serious adverse reactions, most notably the rare risk of Venous Thromboembolism (VTE) and Arterial Thromboembolism (ATE), which are classified under Vascular Disorders. This includes the potential for deep vein thrombosis, pulmonary embolism, myocardial infarction, and stroke. Rare Hepatobiliary Disorders, such as the development of hepatic adenomas and, very rarely, hepatocellular carcinoma, are also documented safety concerns. The risk for VTE is officially noted to be highest during the first year of initial use or upon restarting the medicine after a break. Furthermore, use is restricted in individuals with severe hepatic impairment or certain vascular risk factors.

Overdose and Emergency Response

The regulatory overdose profile for combined oral contraceptives like Allestra is primarily defined by hormonal and gastrointestinal manifestations. Acute overdose of the combined oral contraceptive components is generally classified as non-life-threatening, though immediate medical evaluation is required by regulatory authorities.

Documented Overdose Manifestations

Presentation Official Regulatory Finding
Gastrointestinal Effects Nausea and vomiting are listed as common presentations following a large ingestion.
Hormonal Signs Withdrawal bleeding may occur in females several days after the overdose. Accidental ingestion by young girls (pre-puberty) is noted for the potential for vaginal bleeding.

Emergency Actions and Supportive Management

Mandated Action Official Regulatory Finding
Antidote Availability No specific antidote is known or documented for this formulation.
Treatment Mandate Treatment must be symptomatic and supportive.
Required Immediate Action The regulator mandates that medical help, such as contacting a healthcare provider or poison control, must be sought immediately if an overdose is suspected.

Since no specific antidote is known, the official guidance emphasizes that management must proceed with symptomatic and supportive measures under professional medical supervision. The requirement to seek immediate medical attention is based on the necessity for clinical assessment and monitoring of these documented hormonal effects and vital signs.

Therapeutic Uses of Allestra

What Allestra Treats: Main Uses and Benefits

The combined oral contraceptive pill, which includes the components in Allestra, is used for its therapeutic functions. The overarching goal is the provision of reliable systemic contraception for pregnancy prevention. Beyond this primary role, the medication is commonly used across conditions where additional symptomatic support is needed through hormonal regulation.

Primary Therapeutic Domain: Contraception and Symptom Support

The foundational purpose of Allestra is to provide systemic contraception and is applied in a context where ongoing contraception is the primary benefit sought. The medicine also assists in addressing symptom clusters that may become intense or disruptive, such as heavy menstrual bleeding (menorrhagia) and severe menstrual cramping (dysmenorrhea). In clinical settings, the medication is considered relevant for managing hormonal acne vulgaris and symptoms related to Polycystic Ovary Syndrome (PCOS). This supports the patient during difficult episodes by easing distress and contributes to easing the overall symptom load.

“The primary domain of use for combined oral contraceptives (COCs) is for pregnancy prevention; however, they are also commonly applied for managing menstrual and skin symptoms.”


Quick Fact: Relief for Disruptive Symptoms

Quick Fact: Relief for Menstrual Distress and Hormonal Acne The medication supports the management of symptoms related to physical discomfort and systemic imbalance, including those that become more disruptive during flare-ups and contribute to easing the overall symptom load.

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Who Can and Cannot Use Allestra?

The population eligibility for Allestra (Ethinyl Estradiol/Gestodene) is strictly defined by government regulatory documents, focusing on conditions that present an elevated risk of serious complications, primarily thromboembolism.

Populations Allowed

Use is indicated only for females of reproductive potential who have achieved menarche (onset of menstruation) and who are seeking contraception. The medicine is not indicated for use in pre-menarcheal or postmenopausal women.

Absolute Contraindications (Must Not Use)

Individuals with the following conditions must not use this medication:

  • Current or history of venous or arterial thromboembolism (DVT, PE, stroke, or heart attack).
  • Females over age 35 who smoke cigarettes.
  • Known hereditary or acquired blood clotting disorders (hypercoagulopathies).
  • Known or suspected breast cancer or other estrogen-dependent malignancies.
  • Active liver disease or liver tumors (benign or malignant).
  • Migraine headaches with aura.
  • Uncontrolled hypertension or diabetes with vascular involvement.
  • Pregnancy (known or suspected).

Use Restrictions

Use is not recommended during breastfeeding (lactation) due to potential effects on milk production. Additionally, the medication must be discontinued before and after major surgery that involves prolonged immobilization, and should not be started earlier than four weeks postpartum in non-nursing women.

What should I know about interactions with other medicines?

Interaction Map: Interactions with other medicines and products — official regulatory information for Allestra

Interaction scope Official Regulatory Documentation Summary
Medicinal product categories with documented interactions: Hepatic enzyme inducers, specific Hepatitis C antiviral regimens, CYP1A2 substrates, bile acid sequestrants.
Specific interacting medicines (if explicitly listed): Ombitasvir/Paritaprevir/Ritonavir, Dasabuvir, Glecaprevir/Pibrentasvir (Contraindicated); Tizanidine, Caffeine, Rifampin, Colesevelam.
Mechanistic basis of interactions (only if stated in label): Hepatic enzyme induction (leads to reduced efficacy); Inhibition of Cytochrome P450 1A2; Drug binding/sequestration.
Timing-based interaction rules (if applicable): Requires separation of dosing when co-administered with Colesevelam to mitigate reduced Ethinyl Estradiol exposure.
Population-specific interaction notes (if applicable): Impaired Hepatic Function may alter clearance profiles of the steroid components.
Interaction-related restrictions: Co-administration is prohibited with specific Hepatitis C drug combinations.
Interaction classifications (high-level)
Interaction severity classification (as defined in official documents): Contraindicated Combinations; Interactions resulting in Reduced Efficacy; Interactions resulting in Increased Exposure of co-administered medicines.
Regulatory basis (EMA / FDA / etc.): Official government prescribing information (SmPC, FDA Prescribing Information).
Interaction-context constraints (as defined in official documents): Defines mandatory restriction against specific antiviral regimens and requires precautions with enzyme-inducing substances.

Resulting interaction structure

The regulatory documents define the interaction structure for Allestra by focusing on severe, mandatory contraindications with specific antiviral therapies and clinically significant pharmacokinetic interactions resulting from hepatic enzyme induction and CYP inhibition. This regulatory structure establishes a clear boundary against co-administration with specific medicines while also detailing substances and conditions, such as the use of enzyme inducers or existing hepatic impairment, that officially modify the drug's clearance or exposure.

Mechanism of Action

Central Hormonal Axis Suppression

Allestra utilizes synthetic hormones, Ethinyl Estradiol and Gestodene, which act as agonists at Estrogen and Progesterone Receptors, respectively, to enhance the negative feedback signal directed toward the hypothalamus and pituitary gland. This molecular action suppresses the pulsatile release of FSH and LH, hormones essential for follicular maturation. This cascade results in the physiological consequence of anovulation (inhibition of egg release), which is a primary effect of the drug's mechanism.

Peripheral Tissue Modification

The Gestodene component exerts a localized action by binding to Progesterone Receptors in the cervix and uterus. This receptor interaction alters tissue function, causing the cervical mucus to thicken significantly, which impedes sperm migration. Concurrently, it modifies the structure of the uterine lining (endometrium). These peripheral changes in the reproductive tract create multiple physical alterations that act in parallel with the central mechanism.

Dosage and Administration Information

How Allestra is Used: Official Dosing and Administration

Allestra (Ethinyl Estradiol/Gestodene) is strictly a Combined Oral Contraceptive (COC) and must be administered according to specific, regulated instructions for its intended use. The primary basis for use is the 28-day cyclic protocol as defined in prescribing information.


Administration Requirements

Feature Official Labeled Instruction
Route of Administration Oral use only. The medication is formulated as an oral tablet.
Standard Daily Dose One (1) tablet taken daily (fixed dose). The dose is not subject to titration.
Timing and Order Tablets must be taken at the same time every day and strictly in the order directed by the sequence on the blister pack.
Relation to Meals Can generally be taken with or without food.

The 28-Day Cyclic Regimen

The usage of Allestra is structured around a continuous 28-day cycle to maintain consistency. Users follow a defined sequence, typically taking active tablets (containing the hormones) for 21 to 24 consecutive days, followed by a hormone-free interval of 4 or 7 days, often containing inactive (placebo) tablets. Official instructions emphasize that the next 28-day pack must be started immediately after the last tablet of the previous pack, regardless of whether bleeding has stopped.

This continuous, cyclic dosing regimen is approved for use in postpubertal adolescents following the same adult instructions. Conversely, the use of Allestra is contraindicated in patients with severe hepatic disease, meaning no dose adjustment is specified for this group.


Key Procedural Constraint

Protection may be reduced if an active tablet is missed by more than 12 hours. The proper management of a missed dose is a critical step in the official protocol that depends on the week of the cycle.

Recent Clinical Evidence

Research evidence / Overview of Studies for Allestra

This section summarizes the types of clinical studies and observational data available for Allestra (Ethinyl Estradiol and Gestodene), focusing on the structure of the evidence and areas where research remains limited. This information does not constitute clinical advice or make claims about personal outcomes.


Evidence for Contraception (Pregnancy Prevention)

The primary research for Allestra has involved Randomized Controlled Trials (RCTs). These studies primarily focused on measures of Ovulation Inhibition, which tracks measurements of the suppression of ovulation (the release of an egg), and the Pearl Index, a standardized metric for tracking unintended pregnancies.

Studies reported measurements related to the prevention of ovulation. Long-term observational reports have also been used in research examining patient-reported experiences. What remains uncertain is that effectiveness measured in trials often reflects results under conditions of ideal patient adherence, and data for certain groups, such as women with chronic pre-existing conditions, remain insufficient.


Evidence for Symptom Management

The combined oral contraceptive has been studied for its use in conditions involving periods of heightened symptoms, specifically severe menstrual cramping (primary dysmenorrhea) and hormonal acne.

Research on Severe Menstrual Cramping

Research exploring short-term symptom changes for primary dysmenorrhea has involved RCTs that examined subjective measurements like pain scores and the number of days affected by cramping. However, long-term effects are not fully established, as most studies were short-term, typically observing responses over 6 menstrual cycles.

Research on Hormonal Acne Vulgaris

Research has explored the use of this pill for hormonal acne using Placebo-Controlled Trials that tracked changes in acne lesion counts and androgen biomarkers. However, results apply only to the populations studied, as the vast majority of research focused on women with mild-to-moderate acne, meaning data for severe forms are still emerging.


Research Gaps and Areas of Uncertainty

Evidence quality varies across studies, and there is limited information for long-term outcomes. Comparative evidence against non-hormonal treatments for heavy menstrual bleeding is also lacking in some domains, meaning the available data for comparative effectiveness remain limited across the current evidence landscape.

Frequently Asked Questions (FAQ)

Common questions about Allestra (FAQ)


Q: Is Allestra a strong medicine?

According to official product information and clinical data, this combined oral contraceptive is established as a highly effective method of contraception. Regulatory studies track this effectiveness using standardized metrics like the Pearl Index, which measures the rate of unintended pregnancies.


Q: How does Allestra compare to other drugs for the same condition?

Official regulatory summaries generally state that comparative effectiveness data is limited across the available evidence for this drug versus other options. Decisions about which contraceptive is appropriate are based on a review of factors like the side effect profile and known risks specific to the various formulations available.


Q: Can Allestra cause long-term health problems?

Regulatory documents highlight rare, serious risks associated with the use of all combined oral contraceptives, which include the potential for Venous Thromboembolism (VTE), Arterial Thromboembolism (ATE), and certain rare Hepatobiliary Disorders. These warnings are documented to communicate the most significant potential risks.


Q: Will Allestra make me feel drowsy or tired?

Drowsiness is not typically listed as a common or very common side effect in the official regulatory safety profile. However, other non-specific reactions such as fatigue and general mood changes are listed among the common side effects reported in clinical trials.


Q: What should I avoid eating or drinking while taking Allestra?

Official product information states that the medicine can be taken with or without food. Documents note a specific caution regarding large amounts of grapefruit or grapefruit juice intake, as this can potentially affect the amount of the drug absorbed into the body.


Q: Is it normal to feel a change in appetite when starting Allestra?

Official documentation for this drug or related oral contraceptives often lists changes in appetite as a possible adverse effect, though usually less common. It is also common for patients to report experiencing weight increase while using the medication.


Q: How quickly does Allestra start working?

If the drug is started correctly on the first day of the menstrual cycle, regulatory documents state that contraceptive action is provided immediately. If administration begins later in the cycle, official protocols require the use of a nonhormonal back-up method for the first seven days of active tablet taking to help ensure efficacy.


Q: Can Allestra be taken with common over-the-counter pain relievers?

Official regulatory interaction lists do not typically include common non-prescription pain relievers such as acetaminophen or ibuprofen. These drugs are not documented to cause major interactions that affect the contraceptive’s efficacy.


Q: Is Allestra safe for older people?

This drug is not indicated for use in postmenopausal women. Furthermore, its use is contraindicated for females over the age of 35 who smoke cigarettes due to a significantly increased risk of serious cardiovascular events. Use in older women who are still of reproductive age requires careful individual assessment of all risk factors.


Q: Are there any major diet restrictions with Allestra?

No major long-term diet restrictions are listed in the official product information. The drug can be taken with or without food, and the only known food-related caution is to be mindful of excessive consumption of grapefruit or grapefruit juice.


Q: Is Allestra the same as [Name of similar drug]?

Allestra is a specific Combined Oral Contraceptive that contains the hormones Ethinyl Estradiol and Gestodene. Other oral contraceptives may have different combinations, types, or doses of hormones, meaning they are not the same medicine, even if they share the same purpose.


Q: How long does Allestra stay in your system?

Official pharmacokinetic data indicates that the primary active hormone, Gestodene, has an elimination half-life documented to be around 12 to 15 hours. This means that the active ingredients are cleared from the body relatively quickly once continuous administration is stopped.


Q: Can I take Allestra if I have kidney problems?

While the drug is contraindicated in severe liver disease, official documents note that the drug is used with caution in patients with existing kidney (renal) dysfunction. This is based on the potential for the medication to cause fluid retention, which may be a concern in some kidney conditions.


Q: Is Allestra commonly known by any other name?

The drug contains the active ingredients Ethinyl Estradiol and Gestodene. This specific combination is widely marketed globally under various brand names, which may include Femodene, Minulet, and Gynera, depending on the country.


Q: Does Allestra require any special blood tests while using it?

Regulatory documents advise that healthcare providers routinely monitor the patient’s blood pressure and conduct follow-up visits. Specific blood tests (e.g., for liver function or lipid levels) are not universally required but may be performed before or during therapy based on established clinical guidelines.


Q: Can I drive a car while taking Allestra?

Official regulatory information, where noted, typically states that the drug has no known or negligible influence on the ability to safely drive a car or operate machinery.


Q: Is there a generic version of Allestra available?

Yes. Since the hormone combination Ethinyl Estradiol/Gestodene has been approved for a long time, therapeutically equivalent generic versions are generally widely available. Availability and specific generic names will vary by country.


Q: What happens if I stop taking Allestra suddenly?

When the medication is stopped, the suppression of the central hormonal axis ceases. This leads to the return of ovulation and the potential for pregnancy. The natural menstrual cycle typically returns within a few weeks to months.


Q: Does Allestra affect sleep?

Specific sleep disorders such as insomnia are generally not listed as common side effects in official documents. However, common side effects like headache, mood changes, and fatigue may indirectly affect the quality of sleep for some individuals.


Q: Why do some people say Allestra is hard to tolerate?

Difficulty in tolerance is typically linked to the most frequently reported side effects listed in official documents, which include headache, nausea, breast pain, and mood changes. Rare but serious risks, such as thromboembolism, also contribute to the official restrictions on use.


Q: Is Allestra habit-forming or addictive?

Official regulatory documents do not contain warnings or statements indicating that this drug is habit-forming, has abuse potential, or causes physical or psychological dependence.


Q: Is it true that Allestra is a last-resort medicine?

No. Official guidance and treatment protocols indicate that this drug belongs to a class of medication (Combined Oral Contraceptives) that is routinely recommended as a first-line option for contraception in otherwise healthy women of reproductive potential.


Q: What is the purpose of the black box warning on Allestra (if applicable)?

The Black Box Warning, if present on the US labeling, serves to highlight the drug's most serious risk. This typically concerns the increased potential for serious cardiovascular events (like stroke and heart attack), particularly for women who smoke and are over 35 years of age.


Q: Can Allestra interact with alcohol?

Alcohol is not listed as a substance that causes a major clinical interaction affecting the efficacy or safety of the oral contraceptive itself in regulatory documents. However, alcohol consumption may worsen certain documented side effects like headaches or nausea.


Q: Is it safe to get vaccinated while using Allestra?

Regulatory documents reviewed for the drug typically contain no explicit warnings or restrictions against receiving common vaccinations while taking this medication.


Q: Does Allestra affect laboratory test results?

Yes. The hormones in the drug can interfere with the results of certain laboratory tests. This may include tests for coagulation factors, thyroid-binding globulin, specific lipid/lipoprotein levels, and glucose tolerance.


Q: What kind of monitoring is needed while taking Allestra?

As part of ongoing care, patients should receive regular follow-up examinations. This typically includes routine monitoring of blood pressure, as an increase in blood pressure is a documented risk of combined oral contraceptives.


Q: Is Allestra covered by most insurance plans?

As a common type of generic oral contraceptive, the drug and its equivalents are typically covered under the essential health benefits of many major insurance plans and national healthcare systems. In many regions, this coverage is provided at no cost to the patient.


Q: Why is Allestra sometimes given with another drug?

The drug is sometimes studied for co-administration when treating specific symptoms like acne or dysmenorrhea. Conversely, co-administration is strictly prohibited or highly restricted with certain other medications due to severe risks related to drug interaction (e.g., specific Hepatitis C antivirals).


Q: What are common user experiences with Allestra?

Patient-reported experiences captured in studies often cite changes in symptoms such as headache, tiredness, bloating, and shifts in menstrual pain. The most common adverse reactions officially reported include headache, nausea, and breast pain.


Q: Are there any studies about Allestra in children?

The drug is officially indicated for use only in postpubertal adolescents following the same instructions as adults. It is not indicated for use in pre-menarcheal (pre-pubertal) children, and no efficacy data are officially established for that population.


Q: What is the typical time frame for seeing the full benefit of Allestra?

For its primary contraceptive purpose, full and stable effectiveness is typically expected after the first seven days of continuous active tablet use. For symptom management (like acne or cramping), studies usually track outcomes over at least six menstrual cycles to assess the full benefit.


Q: Are allergic reactions to Allestra common?

Specific allergic reactions are tracked in official documentation. Reactions affecting the skin, such as rash and urticaria (hives), are documented as Uncommon, meaning they occur in less than 1 out of 100 people using the drug.


Q: Does Allestra interact with herbal supplements like St. John’s Wort?

Yes. Official interaction documentation explicitly lists St. John's Wort (Hypericum perforatum) as a strong hepatic enzyme inducer. Co-administration can significantly decrease the effectiveness of the oral contraceptive.


Q: Can Allestra change my mood or energy level?

Yes. Official regulatory side effect lists classify mood changes and depressive moods as Common. Fatigue is also a reported adverse effect that can affect a person's energy level.


Q: Can Allestra be used if I have high blood pressure?

Use is an absolute contraindication for women with uncontrolled hypertension (high blood pressure) or hypertension with associated vascular disease. For women with controlled hypertension, regulatory guidance requires a thorough assessment of all individual benefits and risks.


Q: How do I know if Allestra is working for me?

For contraception, the primary mechanistic goal is the suppression of ovulation, which can be confirmed by specific medical tests. For secondary uses (e.g., acne, cramping), effectiveness is measured by a reduction in symptoms as tracked in clinical studies.


Q: Are there special warnings about Allestra for people with heart issues?

Yes. The drug is contraindicated in patients with current or a history of Arterial Thromboembolism, which includes heart attack (myocardial infarction) and stroke. It is also used with caution in patients with vascular risk factors.


Q: Is Allestra used for any conditions other than the main ones?

While the primary regulatory indication is contraception, some formulations containing these hormones are also specifically indicated or studied for the treatment of moderate acne vulgaris and primary dysmenorrhea (severe menstrual cramping).


Q: Will I need to take Allestra forever?

The drug is indicated for use by women of reproductive potential seeking to prevent pregnancy. Its use is generally continuous until a woman wishes to become pregnant or reaches menopause, at which point the drug is no longer indicated.

How should Allestra be stored and disposed of?

How to Store and Dispose of Allestra

Allestra (Norgestimate and Ethinyl Estradiol Tablets) must be stored at Controlled Room Temperature, specifically 25°C (77°F), with permitted excursions between 15°C and 30°C (59°F and 86°F).


Protection and Safety

The medication must be protected from light and kept away from excess heat and moisture (e.g., not in a bathroom). It is essential to keep the tablets in the container they came in, tightly closed, and stored out of the sight and reach of children.


Disposal Instructions

Unused or expired Allestra should be disposed of by following instructions for a local drug take-back program. If a program is unavailable, the pills should be mixed with an undesirable substance (such as used coffee grounds) and placed in a sealed bag or container before being thrown in the household trash.

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

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Equivalent of Allestra found in:

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