Enskyce

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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 Enskyce

Quick Facts

Property Description
Active ingredient Desogestrel and Ethinyl Estradiol
Form Oral Tablet
Pharmacological class Combined Oral Contraceptive (COC)
Common use Prevention of pregnancy (Birth control)
Origin Synthetic Hormone Combination

What Type of Medicine is Enskyce and What is its Purpose?

Enskyce is a synthetic pharmaceutical preparation classified as a Combined Oral Contraceptive (COC), belonging to the broader Hormonal Contraceptive class of medications. Its primary therapeutic use is indicated solely for the prevention of pregnancy (birth control) in women who elect to use this method. The classification as a COC is defined by the inclusion of both an estrogen and a progestin compound in its formulation.

This prescription-only medicine is provided in an oral dosage form as a tablet for daily ingestion. Enskyce is an example of a monophasic pill, meaning that all active tablets contain the same level of hormone concentration throughout the cycle. Other well-known preparations utilizing this same Desogestrel and Ethinyl Estradiol combination include brands such as Desogen and Ortho-Cept.

Composition and Form: Desogestrel and Ethinyl Estradiol Tablets

The core of Enskyce is a combination product containing two active ingredients: the progestin compound, Desogestrel, and the estrogen compound, Ethinyl Estradiol (EE). Desogestrel is chemically categorized as a third-generation progestogen. It functions as a prodrug, meaning the body metabolizes it rapidly into its biologically active substance, Etonogestrel (3-keto-desogestrel), which is responsible for the majority of the progestational effects. Research confirms that Desogestrel is structurally unique among progestins, allowing for its classification as a newer generation compound.

This blend of hormones is incorporated into the tablet alongside solid pharmaceutical excipients. The full regimen comprises a 28-day regimen blister pack that includes both active hormonal tablets and inactive (inert) tablets, a structure common to many COCs intended to support patient adherence.

The Foundational Contraceptive Principle

The general benefit of Enskyce is delivered through a multi-faceted mechanism of effect designed to prevent conception. The primary physiological action is the suppression of gonadotropins, which subsequently leads to the inhibition of ovulation. This action reliably prevents the release of an egg from the ovary, forming the foundation of its intended therapeutic use.

This central mechanism is fortified by concurrent alterations in cervical mucus, which increases its viscosity to physically impede sperm passage, and by structural changes to the uterine lining (endometrium), which reduces the likelihood of implantation. These multiple, simultaneous actions confirm the general benefit of the preparation in providing effective contraception.

Regulatory References

  1. FDA Label (DailyMed)

What side effects are possible with Enskyce?

Possible Side Effects and Safety Information

The safety profile for Enskyce, a combination oral contraceptive, is defined by regulatory documents based on clinical data and post-marketing surveillance.

Serious Adverse Reactions (Regulatory Warnings)

The most serious, though rare, risk is the increased incidence of thromboembolic disorders (blood clots). This includes:

  • Venous Thromboembolism (VTE): Deep Vein Thrombosis (DVT) and Pulmonary Embolism (PE).
  • Arterial Thromboembolism (ATE): Myocardial Infarction (heart attack) and Stroke.

Other serious regulatory warnings include the potential for developing Hypertension (high blood pressure), Gallbladder disease, and rare Hepatic Neoplasia (liver tumors).

Contraindications and Safety Restrictions

The medication is contraindicated (must not be used) in individuals with specific high-risk conditions, including:

  • A history of VTE or ATE.
  • Known or suspected breast cancer or other estrogen- or progestin-sensitive cancers.
  • Active liver disease or liver tumors.
  • Severe, uncontrolled high blood pressure or diabetes with vascular damage.
  • Smoking in women aged 35 years or older is an absolute contraindication due to a significantly increased risk of serious cardiovascular events.

Usage must be discontinued at least 4 weeks before and for 2 weeks after major surgery or during any prolonged immobilization due to the heightened VTE risk.

Common and Expected Adverse Reactions

The following side effects are documented by regulatory agencies as common (ge 1%) and expected, especially during the first few months of use:

System-Organ Class Common Adverse Reactions
Reproductive/Breast Breakthrough bleeding/spotting, Amenorrhea, Breast tenderness
Nervous System Headache (including migraine), Dizziness
Gastrointestinal Nausea, Abdominal Pain
Other Mood changes, Weight change, Acne

Time-Related Safety Pattern

Regulatory documents explicitly state that the risk of VTE is highest during the first year of initial use and when restarting the medicine after a break of 4 weeks or more.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory documentation for Desogestrel and Ethinyl Estradiol tablets, classified as a combined oral contraceptive, outlines specific, documented clinical patterns associated with acute overdosage. These descriptions are based strictly on regulatory findings and provide the documented profile without offering clinical advice or general medical instructions.

Documented Clinical Manifestations

Acute ingestion of large quantities of this medicine may result in limited symptomatic manifestations. The two primary clinical signs formally documented in regulatory labeling are nausea and the occurrence of withdrawal bleeding in females. These clinical changes represent the expected presentation following an acute overdose event, focusing on gastrointestinal and reproductive system effects.

Assessment of Outcomes and Regulatory Actions

The official prescribing information provides a specific statement regarding the potential for severe outcomes, noting that serious ill effects have not been reported following the acute ingestion of large doses of this oral contraceptive. This finding is specifically detailed in the context of cases involving young children who have accidentally ingested large quantities. Due to the limited nature of documented serious outcomes, regulatory documents do not explicitly mandate immediate actions such as seeking emergency medical attention or specify supportive treatment protocols like the use of gastric lavage or a known antidote. Management is based on a general symptomatic and supportive approach as defined by the documented profile.

Therapeutic Uses of Enskyce

What Enskyce Treats: Main Uses and Benefits

The primary and foundational purpose of Enskyce is the prevention of pregnancy (contraception), offering a highly reliable method for patients who choose daily, non-barrier hormonal control. The medication provides support that helps ease the overall symptom burden associated with family planning, and may assist with maintaining functional stability.

Beyond contraception, the medication is commonly applied in clinical contexts to manage problematic menstrual symptoms that interfere with daily functioning, such as severe cramping (dysmenorrhea), excessive bleeding (menorrhagia), and cycle irregularity. Combination birth control pills provide benefits related to menstrual health and symptomatic relief. It is commonly used to help with cycle stabilization and assists with the overall symptom burden of menstrual blood loss and discomfort.

“The medication is relevant for easing symptoms that interfere with daily comfort, and may assist with maintaining functional stability.”

The medication is applied across domains where additional symptomatic support is needed, including providing supportive relief for symptoms associated with conditions like endometriosis and is used for managing the irregularities and androgen-related symptoms seen in Polycystic Ovary Syndrome (PCOS). It is commonly used to help with symptoms that create noticeable physiological strain, such as moderate-to-severe acne, which contributes to improved day-to-day comfort during symptomatic periods.


Quick Fact: Relief for Menstrual Distress

Symptom Category Therapeutic Benefit
Menstrual Pain (Dysmenorrhea) Assists with overall symptom burden
Heavy Bleeding (Menorrhagia) Is applied in addressing excessive flow
Cycle Fluctuation Supports cycle stabilization

Regulatory References

  1. MedlinePlus Medical Encyclopedia

Eligibility and Restrictions for Use

Who Can and Cannot Use Enskyce?

The eligibility for using Enskyce (Desogestrel and Ethinyl Estradiol) is strictly defined by regulatory authorities and centers on mitigating the risk of serious cardiovascular and thromboembolic events.

Contraindicated Populations (Must Not Use)

Official labeling contraindicates use for specific populations and conditions. This includes females over age 35 who smoke, due to a significantly increased risk of serious cardiovascular side effects. The medicine is also strictly prohibited for individuals with known or suspected pregnancy, current or history of breast cancer, or other estrogen-dependent neoplasia.

Use is further prohibited for those with a history of Deep Vein Thrombosis (DVT), Pulmonary Embolism (PE), Coronary Artery Disease, or other thrombophilic conditions. Specific comorbidities, such as uncontrolled hypertension, diabetes with vascular involvement, and migraine headaches with aura or focal neurological symptoms, also prohibit use. Furthermore, it is contraindicated in patients with active hepatic disease or liver tumors.

Age and Physiological Restrictions

Enskyce is intended for use in adult women and post-menarche teenage females. It is not indicated for use in the elderly population. Use during lactation is not recommended due to potential infant effects and impact on milk production. The label also requires discontinuation at least four weeks before and through two weeks after major surgery that involves prolonged immobilization.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documentation identifies multiple drug and product categories that interact with Enskyce, primarily by altering the concentrations of its hormonal components or by being affected by them. These documented interactions are categorized based on their potential clinical significance.

Interaction Type Interacting Medicines/Classes Practical Implication (Regulatory Constraint)
Contraindicated Combination Hepatitis C combination drug regimens containing ombitasvir, paritaprevir, and ritonavir, with or without dasabuvir. Use with this drug combination is not permitted due to the potential for significant liver enzyme elevations. Enskyce must be stopped before starting this regimen and restarted approximately two weeks after the treatment is completed.
Decreased Drug Concentration Certain Anticonvulsants (e.g., Carbamazepine, Phenytoin), Rifampin, Modafinil, St. John's wort (herbal supplement). These agents are known to decrease the plasma concentrations of the hormonal components via enzyme induction. Concomitant use may reduce the effectiveness of Enskyce.
Increased Drug Concentration Drugs that are substrates for CYP3 A4 or UGT1 A1 (e.g., Lamotrigine, Theophylline). The hormonal components may inhibit the metabolism of these co-administered drugs, potentially increasing their plasma concentrations and requiring careful monitoring.
Other Significant Interactions Tranexamic Acid, Fezolinetant. Co-administration is not recommended. Tranexamic Acid is associated with an increased thrombotic risk when used with hormonal contraceptives.

Additionally, the use of tobacco by women over 35 years of age while taking this product is a documented constraint due to a significantly increased risk of serious cardiovascular events. The product's components may also interfere with the results of certain laboratory tests, such as coagulation factors and thyroid function. Grapefruit juice may also interact with this product.

Mechanism of Action

Central Inhibition of the Hypothalamic-Pituitary-Ovarian Axis

The primary mechanism involves the progestin (Etonogestrel) and estrogen (Ethinyl Estradiol) acting as agonists on their respective Progesterone and Estrogen Receptors within the brain’s control center. This activation generates a profound negative feedback loop that suppresses the release of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH). This core action functionally interrupts the hormonal cascade, leading directly to the physiological abolition of the LH surge, which prevents the release of an egg.


Peripheral Modulation of Reproductive Tissues

The mechanism is supplemented by localized actions on the reproductive tract. The high progestational activity directly modulates the cervical glands, causing the cervical mucus to thicken and decrease in volume, establishing a physical barrier that functionally impedes sperm movement. Concurrently, the hormonal profile modifies the endometrium (uterine lining), rendering the tissue structurally and biochemically unfavorable for successful implantation.


Mechanistic Synergy and Limitation

The combination of estrogen and progestin acts synergistically, influencing both FSH and LH signals. This receptor-mediated process can be constrained; the mechanism is reliant on stable systemic hormone levels, meaning accelerated hepatic metabolism (e.g., due to enzyme-inducing drugs) may weaken the central feedback loop, resulting in insufficient gonadotropin suppression.

Dosage and Administration Information

Enskyce (desogestrel and ethinyl estradiol) is a combination oral contraceptive prescribed to prevent pregnancy. For maximal effectiveness, this medication must be taken exactly as directed, at the same time every day, and in the order indicated on the blister pack, with dosing intervals not exceeding 24 hours.

Each 28-day pack contains 21 light orange 'active' tablets (with hormones) and 7 green 'reminder' tablets (without hormones). Swallow the tablet whole. It can be taken with or without food, though taking it after the evening meal or at bedtime may reduce nausea.

Starting the First Pack

There are two primary ways to begin the regimen:

  • Day 1 Start: Take the first light orange 'active' pill during the first 24 hours of your menstrual period. With this start, a backup birth control method is generally not necessary.
  • Sunday Start: Take the first light orange 'active' pill on the first Sunday after your period begins. If your period starts on a Sunday, begin the pack that day. A non-hormonal backup method of contraception (e.g., condoms) is required for the first 7 days of the first cycle until one 'active' tablet has been taken daily for 7 consecutive days.

Missed Dose Instructions

If one light orange 'active' pill is missed, take it as soon as it is remembered, even if it means taking two tablets in one day. Continue the rest of the pack as usual; a backup method is not required. However, missing two or more 'active' pills, especially in weeks 1, 2, or 3, increases the risk of pregnancy and requires specific guidance based on the week, including the mandatory use of a backup contraceptive method for 7 days. Always refer to the patient package insert provided with the prescription and consult a healthcare professional for specific instructions regarding missed doses, particularly if you have sex in the week after missing tablets.

Recent Clinical Evidence

Research evidence / Overview of Studies for Enskyce

Evidence for Use in Pregnancy Prevention (Contraception)

The primary indication, the prevention of pregnancy, was studied in large-scale research. The main evidence comes from Phase 3 clinical trials where the formulation was observed in thousands of menstrual cycles of use. These trials were designed to measure the rate of pregnancy (often calculated using the Pearl Index). Findings from these pivotal studies describe the measured rate of pregnancy under conditions of high adherence ("perfect use") and under conditions of "typical use" (accounting for factors like missed tablets). Study findings describe the relationship between high adherence and the outcomes related to pregnancy rates.

While the core evidence for contraception is supported by a large volume of data, long-term effects are not fully established by efficacy-focused research. Initial trials typically followed participants for approximately one to one-and-a-half years, with data collected beyond this period primarily focusing on safety surveillance.

Evidence for Managing Menstrual Symptoms and Acne

Research has explored whether this combination may influence outcomes related to acute episodic symptoms such as severe cramping (dysmenorrhea) and heavy bleeding (menorrhagia). Studies monitored outcomes related to physical discomfort and blood loss, tracking patterns over several menstrual cycles. The evidence for these secondary uses is supported by a smaller volume of data compared to the core contraceptive research. Findings were mixed or inconsistent depending on the study design, and comparative evidence against non-hormonal treatments is often lacking.

For acne vulgaris, research involved intermediate-term RCTs that focused on outcomes linked to inflammatory states, tracking changes in lesion counts and severity scores over approximately six months. A key research limitation is that follow-up durations were typically limited to the six-month study period, meaning sustained, long-term maintenance of the skin-related outcomes is not fully established.

Evidence in Specific Populations and Research Gaps

Research was studied in female adolescents after the onset of menstruation, with observed outcomes generally aligning with those seen in adults. The geriatric population was not included in the studies, and therefore data for this group remain insufficient. Overall, the core evidence for contraception is supported by a large volume of data; however, evidence quality varies across studies for the supportive uses, and sample sizes were modest in some trials for secondary outcomes. This landscape of evidence contributes to understanding what is known—and what is still uncertain—about the formulation across a wide range of use contexts.

Key Studies & References NIH: Contraception and the Pearl Index (StatPearls)

Frequently Asked Questions (FAQ)

Common questions about Enskyce (FAQ)

Q: How quickly can I expect Enskyce to start working for its intended purpose?

According to official product information, the contraceptive effect is not immediate for every starting method. For those beginning the Sunday Start regimen, the drug is described as not fully effective until after the first 7 consecutive days of active use. Non-hormonal backup methods are described in the regulatory guidance for use during that initial week.

Q: How long does it take for Enskyce to have its full expected effect?

Full effectiveness is associated with adherence to the exact daily regimen, which helps maintain stable systemic hormone levels. For users who begin on the Sunday Start method, additional non-hormonal contraception is recommended for the first 7 days, indicating that full effectiveness is generally expected after 7 consecutive days of taking the active tablets.

Q: What should I know about taking pain medication while on Enskyce?

Regulatory documents indicate that the hormonal components of this medicine may influence how other drugs are processed in the body. Specifically, the hormonal component ethinyl estradiol has been described as potentially affecting the plasma concentrations of certain pain reliever components, such as acetaminophen and salicylic acid. This is an informational description of a documented interaction.

Q: Are there long-term safety data available for Enskyce?

Studies and official information indicate that initial clinical trials focused on efficacy typically followed participants for approximately one to one-and-a-half years. Data collected beyond this period is primarily for safety surveillance. Long-term effects and outcomes are described in regulatory research summaries as not fully established by efficacy-focused research.

Q: What happens to the body when you stop taking Enskyce?

The official label notes that use must be discontinued before and after major surgery or during prolonged immobilization due to heightened blood clot risk. When a person stops the medication for other reasons, the body generally returns to its baseline hormonal function. This means that menstrual periods, and any symptoms the medicine was helping to manage, are expected to return.

Q: Is Enskyce the same as other combination pills I've seen?

Enskyce contains the specific hormones desogestrel and ethinyl estradiol in a particular strength. Official regulatory sources indicate that this exact combination and dosage means it is chemically equivalent to other combination oral contraceptives that use the identical active ingredients.

Q: Are there certain dietary restrictions I should know about when taking Enskyce?

Official product information explicitly notes that grapefruit or grapefruit juice may interact with this product. This is because consumption may increase the plasma concentration of its hormonal components. The official guidance notes that patients who regularly consume them should be aware of the potential for interaction.

Q: Does diarrhea affect how Enskyce works?

Official patient information addresses the issue of digestive upset. It specifies that a backup method of contraception is described in the patient information in the event of severe vomiting or severe diarrhea. These severe conditions are noted as potentially reducing the drug's effectiveness.

Q: Can people with a history of migraines use Enskyce?

Regulatory documents state that this medication is absolutely contraindicated (must not be used) in women who have a history of migraines with aura because this specific condition increases the risk of stroke. The drug is not contraindicated for migraines without aura, but this condition is described as a precaution in regulatory documentation.

Q: Is Enskyce appropriate for use by women over 35?

Official boxed warnings state that combination oral contraceptives are contraindicated in women who are over 35 years of age and smoke. This is due to a significantly increased risk of serious cardiovascular events. For non-smoking women over 35, the official guidance indicates that cardiovascular risk factors should be considered before initiation of the medication.

Q: Is there a generic version of Enskyce available?

Yes, Enskyce is a brand-name medication. Government resources like the FDA's Orange Book list approved generic versions. These generic products contain the identical active ingredients, desogestrel and ethinyl estradiol, as approved by the FDA.

Q: How does the mix of hormones in Enskyce differ from other birth control pills?

Enskyce is a monophasic combination pill, meaning that all of the active tablets contain the same fixed dose of the two hormones throughout the cycle. This formulation differs from triphasic pills, which change the hormone doses weekly, or progestin-only pills, which contain no estrogen.

Q: What type of research studies support the use of Enskyce?

Evidence for the primary indication (pregnancy prevention) is supported by Phase 3 clinical trials, which are large-scale studies. Evidence for certain secondary uses, such as for acne, is supported by intermediate-term Randomized Controlled Trials ( RCTs).

Q: Has Enskyce been studied in diverse populations?

Official research summaries indicate that studies have included female adolescents after the onset of menstruation, and the observed outcomes generally aligned with those seen in adults. However, the geriatric population was not included in the studies, and thus data for that group is described as insufficient.

Q: Where can I find the official prescribing information for Enskyce?

Official drug information, including the full prescribing information for healthcare professionals and the patient package inserts, is available through authoritative government resources. These include the FDA's DailyMed database and documents from the World Health Organization's Prequalification Program.

Q: What does the term 'monophasic' mean in relation to a drug like Enskyce?

Monophasic describes a combination oral contraceptive where every active pill contains the same amount of both estrogen and progestin hormones. The dose of the hormones does not change throughout the cycle of active tablets.

Q: What if I vomit shortly after taking Enskyce?

Official patient information addresses this scenario. It specifies that a backup method of contraception is described in the patient information in the event of severe vomiting or severe diarrhea. These severe conditions are noted because they may reduce the absorption and effectiveness of the medication.

Q: Can Enskyce be used during breastfeeding?

The official drug label advises that the use of combination oral contraceptives should be started no earlier than 4 weeks after delivery in females who are not breastfeeding. Regulatory documents note that the use of the medicine should be discussed with a healthcare professional if a person is breastfeeding.

Q: Why do some people need to take Enskyce for reasons other than contraception?

Research has explored whether the drug's formulation may influence other outcomes. Studies have examined the effects on acute episodic symptoms such as severe cramping and heavy bleeding, as well as outcomes related to acne vulgaris. These are considered supportive uses.

Q: What are the inactive ingredients in Enskyce?

The official product description lists the various ingredients that are not hormonally active. These inactive ingredients typically include components such as anhydrous lactose, magnesium stearate, and microcrystalline cellulose. The full list can be found in the regulatory labeling.

Q: Does Enskyce protect against sexually transmitted infections?

The patient package insert explicitly states a limitation of this medication. It clearly describes that this product does not protect against HIV infection ( AIDS) or other sexually transmitted diseases.

Q: What happens if I start taking Enskyce at a different time of the month?

The two primary methods for starting the regimen are the Day 1 Start (beginning during the menstrual period) and the Sunday Start (beginning on the first Sunday after the period begins). Starting outside of these recommended times requires the use of additional non-hormonal contraception until the drug’s effectiveness is established.

Q: Is it necessary to have a period while taking Enskyce?

The 28-day pack includes 7 green 'reminder' tablets that contain no hormones. Taking these tablets results in a 7-day hormone-free interval, which is when a withdrawal bleed (a period-like event) is generally expected. This structured cycle is described in the official dosage and administration section.

Q: How reliable is Enskyce when taken correctly?

The primary evidence for use comes from Phase 3 clinical trials that measure the rate of pregnancy using the Pearl Index. These studies describe the measured rate under conditions of high adherence or 'perfect use,' which represents the most effective scenario when the drug is taken exactly as directed.

Q: Can Enskyce cause changes in vision?

Official safety information includes warnings regarding potential adverse effects on the eyes. These warnings refer to potential visual changes or difficulty wearing contact lenses. Official information states that the development of such problems warrants discussion with an eye care specialist.

Q: What is the chemical name of the active ingredients in Enskyce?

The two active hormonal components are desogestrel (a progestin) and ethinyl estradiol (an estrogen). The regulatory label also lists their corresponding, longer chemical names, such as desogestrel ( 13-ethyl-11-methylene-18,19-dinor-17 alpha-pregn- 4-en- 20-yn-17-ol).

Q: Can Enskyce be taken with grapefruit or grapefruit juice?

Official information explicitly warns that grapefruit or grapefruit juice may potentially interact with this product. This interaction is noted because the fruit may increase the plasma concentrations of the hormonal components.

Q: Does Enskyce affect the results of any common lab tests?

Regulatory documents explicitly state that the hormonal components may interfere with the results of certain common laboratory tests. Specifically, this interference is noted for tests measuring coagulation factors and thyroid function.

Q: Can Enskyce be prescribed to adolescents?

Official research was studied in female adolescents who had already begun menstruation. The observed outcomes in this population generally aligned with those seen in adults. Generally, combination hormonal contraceptives are considered appropriate for use in otherwise healthy adolescents.

Q: Does Enskyce contain lactose or any other common allergens?

The official product description details the components of the tablet. The inactive ingredients section lists components that may include lactose monohydrate.

Q: Is Enskyce considered a low-dose oral contraceptive?

In terms of the estrogen component, the ethinyl estradiol is present in a 0.03 mg strength. This specific dosage is commonly described in medical literature as a standard-to-low dose for combination oral contraceptives.

How should Enskyce be stored and disposed of?

How to Store and Dispose of Enskyce?

Enskyce (desogestrel and ethinyl estradiol tablets) must be stored according to the conditions defined in the official regulatory labeling to ensure product stability and effectiveness.


Storage Requirements

Condition Regulatory Requirement
Temperature Store at Controlled Room Temperature, 25 C (77 F), with permitted excursions between 15 C and 30 C (59 F and 86 F).
Child Safety Keep all medicines out of the sight and reach of children.
Container The product should be kept in its original container.

Disposal Instructions

The official guidance for unused or expired Enskyce is to dispose of the product according to local regulations. This ensures the medication is discarded through approved pharmaceutical waste channels rather than in household trash or down the drain.

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

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