Viorele

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Medically reviewed

Laura Arias

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 Viorele

Quick Facts

Property Description
Active ingredients Desogestrel, Ethinyl Estradiol
Form Tablet (Oral)
Pharmacological Class Estrogen and Progestin Combination
Common Use Birth Control (Contraception)
Origin Synthetic

What Type of Medicine is Viorele?

Viorele is a prescription-only synthetic medication classified as a Combination Oral Contraceptive (COC) tablet, belonging to the pharmacological class of estrogen and progestin combinations. This drug is a systemic medication designed for oral administration and is categorized as a multiphasic pill, as it delivers varying doses of the active ingredients across the 28-day cycle. Its identity as a hormonal contraceptive is clinically recognized for its high efficacy when used consistently, which makes it a preferred option for women seeking family planning solutions.


Active Ingredients and Synthetic Origin

The efficacy of Viorele is derived from its two active ingredients: the progestin Desogestrel and the estrogen Ethinyl Estradiol. Both are synthetic steroid compounds chemically manufactured to mimic the function of natural hormones in the body. The progestin component, Desogestrel, is recognized as a third-generation progestogen, and when combined with the synthetic estrogen, it forms the basis of this combination product. The medicine is supplied as a tablet that relies on various solid pharmaceutical excipients as its base vehicle, facilitating oral administration.


What is Viorele Used for?

Viorele is indicated solely for the prevention of pregnancy in women who elect to use this product as a method of contraception. The drug achieves its general therapeutic purpose through a two-fold physiological action characteristic of hormonal contraceptives. This involves the suppression of ovulation, preventing the release of an egg from the ovary, and simultaneously causing the thickening of cervical mucus, which creates a substantial barrier to sperm movement. Combined oral contraceptives are among the most effective, reversible methods of family planning available today.

Regulatory References

  1. official labeling (FDA: Viorele Label)
  2. World Health Organization [WHO Family Planning Methods]

What side effects are possible with Viorele?

Viorele (desogestrel/ethinyl estradiol) is a combined oral contraceptive that may cause side effects, which are generally mild and may decrease after the first few months of use.

Common Side Effects

Common side effects, which may affect more people, include:

  • Nausea and vomiting
  • Headache
  • Breast tenderness or pain
  • Weight change (gain or loss)
  • Bloating or abdominal cramps
  • Irregular menstrual bleeding, such as spotting or breakthrough bleeding, or missed periods
  • Changes in mood, including depression or nervousness

Serious Risks and Warning Signs

Like all hormonal contraceptives, Viorele carries a risk of serious side effects, primarily an increased risk of blood clots. These clots can lead to conditions such as deep vein thrombosis (DVT), pulmonary embolism (PE), stroke, or heart attack. The risk is highest during the first year of use and when restarting the medication after a break of four weeks or more.

Immediately seek medical attention if you experience signs of a serious problem, such as:

  • Sudden severe headache or trouble speaking
  • Pain, swelling, or warmth in the leg (a sign of DVT)
  • Sudden shortness of breath or chest pain (a sign of PE)
  • Blurred vision or loss of vision
  • Yellowing of the skin or eyes (jaundice), which may indicate liver problems
  • Severe abdominal pain
  • Uncontrolled high blood pressure

Contraindications

Viorele is not suitable for everyone. It is typically contraindicated for women who are over 35 and smoke, or those with a history of blood clots, certain types of cancer (like breast cancer), uncontrolled high blood pressure, certain heart conditions, or liver disease. Your healthcare provider will assess your personal health history to determine if Viorele is safe for you.

Overdose and Emergency Response

Overdose and When to Seek Help: Official Regulatory Information

The information below summarizes the documented overdose profile for Viorele, based exclusively on government regulatory sources, detailing expected clinical signs and mandated emergency actions.

Feature Official Documentation Summary
Documented Manifestations Nausea, vomiting, and the potential for withdrawal bleeding (vaginal bleeding) [NIH/MedlinePlus, FDA].
Severity Classification Overdose is generally classified in regulatory documents as not likely to be life-threatening.
Antidote Status No specific antidote is known; treatment is officially defined as symptomatic and supportive.
Population-Specific Note Withdrawal bleeding may occur specifically in female children who ingest the tablets.

Required Emergency Actions

The regulatory profile mandates immediate professional medical consultation in an overdose scenario.

Official overdose statements:

  • Individuals must seek medical help right away and are instructed to contact a national Poison Help center for guidance.
  • Emergency services must be contacted if severe, acute symptoms occur, such as sudden chest pain, trouble breathing, or passing out.
  • Management is symptomatic and supportive, which may involve monitoring of vital signs or the administration of activated charcoal in a healthcare setting.

Connection to the overall overdose profile: Regulatory documents define the overdose profile primarily by listing expected, self-limiting clinical manifestations and confirming the lack of a specific antidote. The official requirement to seek immediate medical help is mandated to ensure supportive care and to rule out the possibility of rare, severe acute events that necessitate hospital monitoring.

Therapeutic Uses of Viorele

The central therapeutic purpose of this medication is to support proactive health decisions. It is generally used for the prevention of pregnancy. This core benefit is relevant across therapeutic domains including managing conception risk, supporting long-term family planning, and assisting with elective fertility management. The primary utility is that the medication is applied in addressing situations requiring continuous management of fertility status, as summarized by the principle:

“The medication is applied in addressing situations requiring continuous management of fertility status.”

Viorele is primarily used for managing the continuous risk of unintended gestation, providing a method that may support the management of reproductive timing. This approach is relevant in clinical scenarios requiring proactive, continuous management of fertility. For adult women of reproductive potential, this may assist with supporting functional stability and contributes to easing discomfort in personal reproductive health choices.


Quick Fact: Support for Reproductive Timing
Primary Domain: Preventative reproductive health
Benefit: Helps manage the continuous risk of conception
Context: Relevant for long-term, elective fertility planning

Regulatory References

  1. Viorele official labeling from the NIH National Library of Medicine

Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Viorele — Official Regulatory Information

Category Eligibility Rule (Official Labeling)
Populations for whom use is allowed Females of reproductive potential who elect to use this product for the prevention of pregnancy.
Populations for whom use is not recommended Females who are breastfeeding, as the drug may pass into breast milk and decrease milk production.
Populations for whom use is contraindicated Females over age 35 who smoke, and those with a high risk of arterial or venous thrombotic diseases, including current or history of Deep Vein Thrombosis (DVT), Pulmonary Embolism (PE), cerebrovascular disease, or coronary artery disease.
Age-related eligibility rules Use is appropriate only after menarche (onset of menstruation) in adolescents. The drug is not indicated for use in elderly women.
Condition-specific eligibility rules Contraindicated in patients with active liver disease, liver tumors (benign or malignant), known or suspected breast cancer, and inherited or acquired hypercoagulopathies.
Pregnancy and lactation eligibility status Contraindicated if pregnancy is known or suspected. Not recommended during breastfeeding.

Eligibility Classifications (High-Level)

Classification Regulatory Status
Eligibility severity classification Contraindication: Denotes absolute prohibition of use. Not Recommended: Indicates use is discouraged.
Eligibility-context constraints Co-administration with Hepatitis C combination regimens containing ombitasvir/paritaprevir/ritonavir, with or without dasabuvir, is a specific contraindication.

Resulting Eligibility Structure

Official eligibility statements:

  • Use is permitted only for females of reproductive potential for the purpose of contraception.
  • The medicine is contraindicated in any female with uncontrolled hypertension, diabetes with vascular disease, or a history of heart attack or stroke.
  • The drug is not recommended for use during breastfeeding, and use is not established for the geriatric population.

Connection to the overall eligibility profile: Official regulatory documents define who can and cannot use this medicine primarily through a list of absolute contraindications centered on pre-existing cardiovascular risks and hormone-sensitive conditions. The core eligibility is limited to females of reproductive potential who do not possess any of the documented comorbidity-based or behavioral risk factors that prohibit its use.

What should I know about interactions with other medicines?

Viorele's interaction profile focuses on substances that significantly alter the plasma concentrations of its active hormones, potentially compromising contraceptive effectiveness or increasing adverse risks.

Contraindicated and High-Risk Combinations The co-administration of Viorele with certain Hepatitis C combination regimens, specifically ombitasvir/paritaprevir/ritonavir, with or without dasabuvir, is contraindicated due to the documented risk of significant liver enzyme (ALT) elevations. Viorele must be discontinued prior to starting these therapies and restarted approximately two weeks after completion. The regimen glecaprevir/pibrentasvir is also not recommended.

Metabolic and Exposure-Altering Interactions Substances classified as hepatic enzyme inducers, such as the antibiotic Rifampin and herbal product St. John's Wort, as well as certain anticonvulsants like Phenytoin and Carbamazepine, can decrease the hormones' exposure, resulting in reduced contraceptive efficacy. Conversely, strong CYP3A4 inhibitors, such as Erythromycin, may increase the plasma exposure of the estrogen component. The anesthetic reversal agent Sugammadex significantly lowers progestogen concentration, necessitating the use of non-hormonal back-up contraception for seven days after its administration.

Other Interaction Constraints Viorele can increase the plasma concentrations of co-administered medicines, including Theophylline and Prednisolone. Furthermore, use is formally contraindicated in females with active liver disease due to the potential for impaired hormone clearance.

Mechanism of Action

Viorele introduces desogestrel (a progestin prodrug) and ethinyl estradiol (a synthetic estrogen) into the systemic circulation. Desogestrel is rapidly metabolized to its biologically active form, etonogestrel. The mechanism of action involves the pharmacological activities of both etonogestrel and ethinyl estradiol, primarily exerted on the hypothalamic-pituitary-ovarian (HPO) axis and reproductive tissues.

Etonogestrel acts as a potent agonist at the progesterone receptor (PR), exhibiting progestational activity. The combined presence of the synthetic progestin and estrogen provides negative feedback to the hypothalamus and the anterior pituitary gland. This signaling cascade results in the suppression of the pulsatile release of Gonadotropin-Releasing Hormone (GnRH) from the hypothalamus and, consequently, the suppression of pituitary secretion of Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH).

This central suppression inhibits follicular development in the ovaries, preventing the LH surge—the requisite signal for ovulation. At the system level, this results in the absence of a released ovum. Concurrently, etonogestrel modulates the properties of cervical mucus, increasing its viscosity to impede sperm transit, and alters the endometrium (uterine lining), modifying cellular structure and glandular receptivity.

Dosage and Administration Information

Viorele is administered orally and must be taken exactly as directed, with one tablet taken daily for 28 consecutive days at the same time each day to maintain a consistent 24-hour dosing interval. The tablets must be taken in the order directed on the blister pack, as the 28-day regimen consists of 21 active white to off-white tablets, followed by 2 pale green to yellowish green inert (placebo) tablets, and then 5 light yellow to yellow active tablets.

Starting and Procedural Rules

The instructions provide two ways to begin the regimen:

  • Day 1 Start: Take the first tablet on the first day of the menstrual period.
  • Sunday Start: Take the first tablet on the first Sunday after the menstrual period begins. For the first cycle of a Sunday Start, an additional non-hormonal contraceptive method must be used for the first 7 consecutive days.

Following either start method, a new 28-day pack is started immediately on the day after the last tablet of the previous pack is taken. If vomiting or acute diarrhea occurs within 3 to 4 hours of taking an active tablet, a new active tablet should be taken as soon as possible.

Missed Tablet Instructions

Instructions for a missed dose vary based on the number of tablets missed and the week they are missed. If one active tablet is missed in Weeks 1, 2, or 3, the tablet should be taken as soon as remembered, even if two tablets are taken in one day. If two or more active tablets are missed, specific steps are followed which include taking the last missed tablet, resuming the schedule, and using a back-up method for 7 days. The specific procedural steps for missed tablets define the immediate non-hormonal contraception requirements needed to prevent a reduction in effectiveness.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Viorele

The research base for Viorele (Desogestrel/Ethinyl Estradiol) includes Randomized Controlled Trials (RCTs), systematic reviews, and large clinical trials. These studies primarily examined the medicine in research contexts related to the prevention of pregnancy in healthy women of reproductive age.

Evidence for Use in Pregnancy Prevention (Contraception)

Research has explored two main patterns related to effectiveness: the rate of unintended pregnancy when the medicine was observed in the perfect-use scenario (consistent, correct use) and the rate associated with typical use (reflecting real-world adherence and consistency). Studies monitored the Pregnancy Rate, typically calculated using the Pearl Index, as a standardized way that research describes observed group patterns. Comparative trials have also been performed, reporting patterns related to the measured rate of unintended pregnancy when comparing this formulation to other types of combined oral contraceptives (COCs).

Research acknowledges that the difference between perfect-use and typical-use rates introduces a known measure of variability that is still uncertain for any individual user. Direct head-to-head trials against every single alternative contraceptive formulation are not fully established across the research landscape.

Evidence for Use in Mild to Moderate Acne

Research exploring outcomes related to mild to moderate acne primarily involves Randomized Controlled Trials that evaluated female participants with mild to moderate acne who were also seeking contraception. These studies primarily focused on outcomes linked to inflammatory or irritative states and observable skin changes. Outcomes measured included the total number of acne lesions and overall clinical severity using the Investigator’s Global Assessment (IGA) score.

Studies reported patterns related to measured changes over the observation period, with most trials covering an intermediate duration of about six consecutive menstrual cycles. Data show patterns related to changes over the observed period, but the evidence is limited regarding long-term outcomes, as follow-up durations were typically short.

What is Still Uncertain About the Available Research

Key limitations noted in the research landscape include the lack of sufficient data for certain groups, specifically for women with certain pre-existing chronic conditions, where the results apply only to the populations studied in the RCTs. For some endpoints, long-term effects are not fully established, and comparative evidence against all alternative contraceptive methods is lacking.

Key Studies & References

  1. VIORELE® (Desogestrel and Ethinyl Estradiol Tablets, USP 0.15 mg/0.02 mg and Ethinyl Estradiol Tablets, USP 0.01 mg) Rx only - DailyMed

Frequently Asked Questions (FAQ)

Common questions about Viorele (FAQ)


Q: Does Viorele have a generic version available?

A: Viorele is described in official product information as a branded generic of the previously available medicine Mircette. Other generic versions of desogestrel and ethinyl estradiol, which contain the same active ingredients, are also available.


Q: Is Viorele considered a low-dose contraceptive?

A: Viorele is officially classified as a low-dose combined oral contraceptive (COC). This is because the estrogen component, ethinyl estradiol, is present in a concentration of 20, mu g or less during part of the monthly cycle.


Q: How quickly is Viorele expected to start working?

A: When starting the medication, the official product labeling specifies that if you use the Sunday Start method, a non-hormonal back-up contraceptive (like condoms) should be used for the first 7 days as a measure described in the product labeling to support contraceptive effectiveness. If you use the Day 1 Start method, a back-up is not typically required.


Q: Can Viorele be taken by people who have never had children?

A: Official documentation indicates that Viorele is for use by females of reproductive potential to help prevent pregnancy. There are no restrictions in the official labeling based on whether a person has previously given birth.


Q: What happens if a person becomes pregnant while taking Viorele?

A: Official information states that Viorele is contraindicated (must not be used) if pregnancy is known or suspected. Studies generally indicate that exposure to the medicine early in a confirmed pregnancy does not increase the risk of birth defects, but official guidance indicates that use must be stopped immediately.


Q: Can Viorele affect future fertility after stopping use?

A: Regulatory documents report that temporary infertility (a delay in returning to a normal menstrual cycle) is an effect that may occur after the medicine is discontinued. The period of time for cycles to return to normal can vary among individuals.


Q: Is Viorele safe for someone who has a history of migraines?

A: The official product information states that Viorele is contraindicated for people who have migraine with aura (a temporary sensation that occurs before a migraine). Separately, headaches and migraines are also listed as common side effects of the medicine.


Q: Is it normal to have spotting or bleeding while on Viorele?

A: Irregular bleeding, which includes spotting or breakthrough bleeding between expected periods, is a common experience reported in regulatory documents, especially during the first few months of use. This is typically temporary.


Q: How long does it typically take for cycles to return to normal after stopping Viorele?

A: As temporary infertility is a reported effect after stopping the medicine, the return to a regular menstrual cycle can vary. Official information indicates that the time it takes for a normal cycle to resume is different for each person.


Q: Can Viorele cause changes in appetite?

A: Official labeling lists weight change (gain or loss) as a common side effect of Viorele. Loss of appetite is also noted as a warning sign in regulatory documents, specifically in association with potential liver injury, which is a rare but serious side effect.


Q: Are there different versions or doses of Viorele available?

A: Viorele is a specific combination product that contains a fixed amount of the progestin desogestrel and varying amounts of the estrogen ethinyl estradiol. Only one specific formulation is available under the name Viorele.


Q: What are the ingredients in Viorele besides the active hormones?

A: The tablets contain a base of inactive ingredients (excipients) in addition to the active hormones. Regulatory documents list common excipients such as lactose monohydrate, corn starch, stearic acid, and various coloring agents.


Q: What is the significance of the two different active hormone doses in Viorele's cycle?

A: Viorele is officially described as a multiphasic regimen, meaning the hormone levels change across the 28-day pack. This is designed to reduce the total amount of hormones a person is exposed to over the month while designed to support cycle control.


Q: Can Viorele be used long-term?

A: The medicine is indicated for the prevention of pregnancy in women of reproductive potential. Official documentation does not specify a maximum duration of use, but official documentation indicates that continuous assessment of contraindications and risk factors is required.


Q: How does Viorele differ from other oral contraceptives?

A: Viorele is defined by its active ingredients: the progestin desogestrel and the estrogen ethinyl estradiol. Official documentation classifies desogestrel as a third-generation progestin. Other oral contraceptives may contain different progestin types or different hormone doses.


Q: Is it necessary to use a backup method when first starting Viorele?

A: Official instructions specify that if you begin the medicine using the Sunday Start method, you must use a non-hormonal back-up contraceptive for the first 7 consecutive days. This is not typically required when using the Day 1 Start method.


Q: Can the effectiveness of Viorele be lowered by antibiotics?

A: Official product labeling specifically identifies the antibiotic Rifampin as a substance that significantly decreases the concentration of the hormones, which can reduce contraceptive effectiveness. Other common antibiotics are not listed to have this same effect in the official documentation.


Q: Does Viorele interact with supplements like St. John's wort?

A: Yes, St. John's wort is listed in official documentation as a product that can interact with Viorele. This interaction can decrease the concentration of the hormones in the body, which may result in reduced contraceptive effectiveness.


Q: Does Viorele interact with common over-the-counter pain relievers?

A: The official documentation does not list specific interactions between Viorele and common over-the-counter pain relievers, such as ibuprofen or acetaminophen.


Q: Does Viorele have known interactions with anti-seizure medications?

A: Yes, certain anti-seizure medicines, such as Phenytoin and Carbamazepine, are listed in the official documentation as medicines that can decrease the hormone exposure in the body. This interaction may reduce contraceptive efficacy.


Q: Can Viorele affect cholesterol or lipid levels?

A: Official product information states that combined oral contraceptives may cause changes in lipid profiles (cholesterol and fats in the blood). The use of the medicine is subject to contraindications related to cardiovascular health, which often involves lipid concerns.


Q: What official research has been published about Viorele?

A: Clinical trials for Viorele were conducted to assess its effectiveness in preventing pregnancy. These studies typically reported patterns related to the Pregnancy Rate, often using the Pearl Index to standardize measurements of observed effectiveness.


Q: Do studies support the use of Viorele for purposes other than contraception?

A: Viorele is indicated solely for the prevention of pregnancy. However, official research has also been conducted to evaluate its effects on outcomes related to mild to moderate acne.

How should Viorele be stored and disposed of?

Official Storage and Disposal Requirements

Viorele (desogestrel and ethinyl estradiol tablets) must be stored at Controlled Room Temperature, which is defined as 20 C to 25 C (68 F to 77 F). The product must be protected from both excessive heat and moisture to maintain its stability and effectiveness. Brief excursions outside this range, between 15 C and 30 C (59 F and 86 F), are permitted.

All medication must be stored strictly out of the reach of children and pets.

For disposal, unused or expired Viorele should not be flushed down a toilet or sink. The official method is to utilize a drug take-back program. If one is unavailable, dispose of the tablets in the household trash by following the FDA's procedure for non-flushable medicines.

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

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