April

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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 April

Quick Facts

Property Description
Active Ingredients Ethinyl Estradiol and Levonorgestrel
Form Oral Tablets
Pharmacological Class Combination Hormonal Contraceptive
Common Use Pregnancy Prevention (Birth Control)
Origin Synthetic (Steroidal hormones)

What Type of Medicine is April and How is it Classified?

April is a prescription-only medication classified as a Combined Oral Contraceptive (COC), commonly referred to as a birth control pill, which is taken by the oral route of administration. This drug's pharmacological classification is officially designated as a Combination Hormonal Contraceptive, an agent widely used for fertility regulation and categorized within the fixed combinations group of progestogens and estrogens. This combination is recognized for its efficacy for women seeking a reversible method of family planning. It is physically presented as oral tablets and is primarily intended for use by females of reproductive potential whose general therapeutic purpose is pregnancy prevention.


Composition and Origin: Is April a Natural or Synthetic Hormone Drug?

April is a combination product composed of two distinct active ingredients that are entirely synthetic steroidal hormones: Ethinyl Estradiol and Levonorgestrel. Ethinyl Estradiol functions as the estrogen component, while Levonorgestrel serves as the progestin, a second-generation synthetic progestogen. This formulation of Levonorgestrel and Ethinyl Estradiol is specifically classified as an oral contraceptive. It is a common generic option, widely available under many trade names in the market, such as Altavera and Aviane. Being made of chemically synthesized hormones, April is classified as a synthetic drug entity, utilizing solid pharmaceutical excipients as the base for the oral tablets dosage form.


High-Level Purpose of April

The overall purpose of April is to provide a reliable means of birth control through a coordinated set of physiological actions that manage fertility. The dual combination of estrogen and progestin works primarily to suppress the body's natural cycle, which includes halting the monthly release of an egg (suppression of ovulation). Furthermore, this combined hormonal mechanism thickens the cervical mucus, creating a barrier, and initiates changes in the uterine lining (endometrium), making the environment unsuitable for implantation. These integrated actions ensure a high-efficacy strategy for pregnancy prevention.

Regulatory References

  1. NIH MedlinePlus

What side effects are possible with April?

Possible Side Effects and Safety Information

The safety profile for this combination hormonal contraceptive (Ethinyl Estradiol and Levonorgestrel) is officially documented by regulatory authorities, with adverse reactions classified by frequency and grouped into System-Organ Classes (SOC).

Commonly Documented Adverse Reactions

Adverse effects listed as Very Common (affecting more than 1 in 10 users) or Common (affecting 1 to 10 in 100 users) typically involve the nervous, gastrointestinal, and reproductive systems. These commonly include headache, nausea, abdominal pain, breast pain/tenderness, and mood changes including depressed mood [NIH MedlinePlus]. Breakthrough bleeding or spotting is also classified as a Very Common effect, often occurring most frequently during the initial cycles of use, as noted in regulatory labeling.

Serious Adverse Reactions and Constraints

Regulatory documents emphasize the risk of Serious Adverse Reactions, although these are rare (affecting less than 1 in 1,000 users). The most critical documented risks include Thromboembolic Events, specifically Venous Thromboembolism (VTE) and Arterial Thromboembolism (ATE), which encompass risks such as stroke and myocardial infarction [FDA/DailyMed]. An increased risk of developing Hepatic Neoplasia (liver tumors) and Severe Hypertension is also officially noted.

Population-Specific Safety Considerations

The medicine is subject to explicit Safety-Related Restrictions for high-risk individuals. It is officially contraindicated for those with a history of or current thromboembolic disorders or known hormone-sensitive tumors [EMA SmPC]. Furthermore, the risk of serious cardiovascular events is substantially increased in smokers over 35 years of age, a key consideration documented in official safety information.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory documents for April (Ethinyl Estradiol and Levonorgestrel) classify acute overdose as having a low acute toxicity profile, meaning it is generally not likely to be life-threatening. Official prescribing information states that no serious adverse outcomes have been consistently documented following acute over-ingestion of this combination hormonal contraceptive.

Documented Manifestations

The primary clinical signs noted in regulatory labeling are typically confined to the gastrointestinal and reproductive systems. These manifestations include nausea and vomiting. Furthermore, withdrawal bleeding (or uterine bleeding) is a specifically recognized physiological sign that may occur in females following an acute overdose. This presentation is also noted in pediatric patients (young girls) who have ingested the tablets.

Emergency Actions

In the event of a suspected overdose, the officially mandated action is to seek immediate medical attention by contacting a poison control center or emergency services. Management for April overdose is symptomatic and supportive, as no specific antidote is known or available to reverse the effects of the active components. Professional monitoring and supportive care are required to address any symptoms that manifest.

Therapeutic Uses of April

What April Treats: Main Uses and Benefits

The therapeutic utility of April is applied across therapeutic domains, providing systemic support across several hormone-related domains to enhance patient comfort and stability. This combination of hormones is commonly used for both its primary and non-contraceptive benefits.


April is commonly used as a method of reversible family planning for women seeking Pregnancy Prevention. Beyond contraception, its use is relevant across therapeutic domains involving recurrent and systemic symptoms that create noticeable physiological strain. The medication is applied in addressing conditions characterized by periods of heightened symptoms, including Irregular Menstrual Cycles, Heavy Menstrual Bleeding (Menorrhagia), Severe Menstrual Cramps (Dysmenorrhea), and the pronounced distress associated with Premenstrual Dysphoric Disorder (PMDD). It also supports the management of Androgen-Related Manifestations like persistent hormonal Acne and Hirsutism.

This therapy is generally aimed at providing contraception while offering supportive relief that helps patients cope more steadily with difficult cyclical episodes.

This supportive relief contributes to easing the overall monthly burden, supports general well-being during symptomatic phases, and may be associated with a reduced risk of Iron Deficiency Anemia related to excessive blood loss.


Quick Fact: Relief for Cyclical Discomfort

Symptom Domain Key Benefit Provided
Menstrual Cycle Assists with managing flow intensity and cycle regularity
Premenstrual Distress Supports coping with severe physical and emotional symptoms
Androgen Manifestations Contributes to easing chronic skin and hair burdens

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Eligibility for April: Official Regulatory Status

April (Ethinyl Estradiol and Levonorgestrel), a combined oral contraceptive, is officially indicated for use by females of reproductive potential after the onset of menstruation (post-menarcheal adolescents and adult women). The eligibility profile is strictly defined by regulatory authorities to exclude populations with a high risk of serious cardiovascular events.

Eligibility Classification Population Group / Condition Status in Label
Contraindicated Women over age 35 who smoke Unacceptable Risk
History of arterial or venous thrombotic disease (e.g., DVT, stroke) Absolute Prohibition
Known or suspected pregnancy Absolute Prohibition
Severe liver disease (e.g., tumors, decompensated cirrhosis) Absolute Prohibition
Migraines with focal neurological symptoms (aura) Absolute Prohibition
Restricted Use Postpartum women not breastfeeding Not Recommended (First 4 weeks)
Lactating women (Breastfeeding) Not Recommended
Patients with uncontrolled hypertension Contraindicated

Age-Related Rules: Use is not indicated for pre-menarcheal children or post-menopausal older adults, as the drug's purpose is limited to women of reproductive age. For females with comorbidities like diabetes mellitus, the presence of vascular complications constitutes an absolute contraindication.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Interaction Scope

Classification Examples of Interacting Substances
Hormone Metabolism Reducers CYP450 Enzyme Inducers (e.g., Rifampin, Phenytoin, Carbamazepine, Topiramate) and the herbal product St. John's Wort.
Hormone Metabolism Enhancers CYP450 Enzyme Inhibitors, Ascorbic Acid, Acetaminophen, and Grapefruit Juice.
Contraindicated Regimens Hepatitis C drug combinations (e.g., Ombitasvir/Paritaprevir/Ritonavir).
Effect on Co-Drugs Lamotrigine, Caffeine, Thyroid Hormone Replacement.

Interaction Classifications (High-Level)

Official regulatory documents classify interactions primarily by their effect on hormone plasma concentrations (exposure). Co-administration is contraindicated with Hepatitis C drug combinations containing Ombitasvir/Paritaprevir/Ritonavir, with or without Dasabuvir, due to the documented risk of significant liver enzyme (ALT) elevations.

Resulting Interaction Structure

Official statements confirm that potent CYP3A4 inducers and St. John's Wort accelerate hormone metabolism, leading to reduced plasma concentrations and decreased effectiveness. Conversely, substances like Ascorbic Acid and Acetaminophen may officially increase the bioavailability of the estrogen component. The medicine also officially decreases the plasma concentrations of Lamotrigine and can affect the levels of co-administered thyroid and corticosteroid replacement therapies. A timing-based restriction notes that acute vomiting or diarrhea occurring within 3 to 4 hours after taking an active tablet may result in officially decreased absorption.

Government regulatory documents define this interaction structure primarily through metabolic alteration impacting the plasma exposure of the hormonal components. This profile identifies numerous substances that officially reduce or increase the systemic levels of the medicine, alongside specific combinations designated as contraindicated.

Mechanism of Action

Modulating B-cell Survival and Function

This domain centers on the drug's action against the A PRoliferation-Inducing Ligand (APRIL) pathway, a key regulator of immune responses. APRIL, a member of the TNF superfamily, typically promotes the survival, proliferation, and differentiation of B cells and plasma cells. The drug acts by engaging mechanisms that disrupt the binding of APRIL to its receptors—specifically BCMA (B-cell maturation antigen) and TACI (Transmembrane Activator and CAML Interactor). This mechanism modulates a point of regulation in the humoral immune system, modifying early molecular steps to support a more regulated state within targeted pathways.


Regulating Antibody-Secreting Cells

The mechanistic cascade initiates with reduced signaling through the APRIL-receptor pathway, directly impacting the life cycle of antibody-secreting cells. This modification suppresses the signals that lead to the survival of long-lived plasma cells in the bone marrow and their differentiation. By limiting the impact of excessive mediator activity (APRIL), the drug influences the overall cellular burden of antibody production, including specific antibodies. The resulting physiological effect contributes to the regulation of elevated immune signaling by reducing the concentration and activity of specific antibodies.

Dosage and Administration Information

The administration of April, a combination hormonal contraceptive, is based on structured protocols that detail the required route, dose frequency, and cyclic patterns. The route of administration is oral (by mouth), utilizing sequential blister packs that contain combinations of active hormone tablets (levonorgestrel and ethinyl estradiol) and, depending on the formulation, inactive or lower-dose tablets.


Dosing and Schedule

The primary framework for use is a fixed daily dosing frequency, where one tablet is taken once daily at the same time every day, ensuring the 24-hour interval between doses is maintained. The dosing schedule is defined by two general patterns: the Standard 28-Day Cycle or an Extended 91-Day Cycle, which dictates the specific sequence of active versus non-active pills. Initiation may begin on the first day of the menstrual period (Day 1 Start) or the first Sunday following its onset (Sunday Start).


Procedural Requirements

Specific procedural instructions exist regarding the use of this medication. For the Sunday Start, a non-hormonal backup method is required for the first seven consecutive days of use. Administration guidelines state that if an active tablet is missed, a precise, cycle-dependent protocol is typically followed. Furthermore, if severe vomiting or diarrhea occurs within three to four hours after taking an active tablet, it is treated procedurally as a missed dose. For those who are not breastfeeding, the medication is typically initiated no earlier than four weeks after delivery. The dose for postmenarchal females is equivalent to the adult dosage.

Recent Clinical Evidence

Research Evidence / Overview of Studies for April

The information below summarizes the clinical research and scientific evidence for the combined hormonal medicine April (Ethinyl Estradiol and Levonorgestrel), focusing only on the structure of the available studies and regulatory findings, without offering any medical advice or treatment recommendations.


Evidence for Pregnancy Prevention (Contraception)

Research was conducted to evaluate April in the context of pregnancy prevention. The evidence base for this use is founded on extensive research, including Phase 3 randomized controlled trials (RCTs) and very large-scale observational studies that track usage over many years. Researchers in these studies examined the rate of pregnancy among participants using the medicine, a key measure known as the Pearl Index, and examined outcomes related to the inhibition of ovulation.

These studies, involving large cohorts of females of reproductive potential, describe patterns showing that when the medicine is used consistently and exactly as directed (perfect use), the reported outcomes related to pregnancy incidence are observed to be lower than when doses are occasionally missed (typical use). Evidence is limited regarding reported pregnancy rates for women with a higher Body Mass Index (BMI 30 kg/m^2) compared to other groups.


Evidence for Management of Menstrual Cycle-Related Symptoms

Research has explored how this medicine was evaluated in the context of several conditions characterized by fluctuating or episodic manifestations linked to the menstrual cycle. These studies examined outcomes related to physical discomfort and systemic or functional imbalance.

For heavy menstrual bleeding (Menorrhagia), studies explored changes in menstrual blood loss volume and monitored the use of pain medication for cramps. The findings describe patterns observed in the studies where a measurable change in blood loss volume was observed compared to baseline levels, as well as patterns related to self-reported pain scores for menstrual cramps.

For Premenstrual Dysphoric Disorder (PMDD), research includes specific double-blind, placebo-controlled RCTs. These studies examined outcomes related to systemic or functional imbalance using validated scales. Reported outcomes in the hormonal group showed statistically discernible differences on some key measures when compared to the placebo group. However, findings were mixed across all symptom axes, and studies often reported a significant placebo effect.


Evidence for Addressing Androgen-Related Manifestations

April was studied for its evaluation in the context of managing conditions where symptoms may vary in intensity, such as hormonal acne and mild hirsutism (excessive hair growth). Studies tracked gradual changes in acne lesion counts and overall severity assessments over time, and patterns related to improvement were observed in some studies, but these changes typically required a follow-up duration of six months or longer. Comparative evidence is lacking for this specific combination against all other available hormonal options.


What Remains Uncertain About the Research for April

Long-term effects are not fully established for non-contraceptive uses or for specific populations, as follow-up durations were limited in many symptom-focused studies. For certain groups (e.g., women with a high BMI or specific complex comorbidities), data remain insufficient to provide certainty regarding the reported outcomes.

Key Studies & References

  1. Levonorgestrel and Ethinyl Estradiol (Oral Route) - Drug Information
  2. NICE Guideline: Heavy menstrual bleeding: assessment and management (Referencing hormonal treatments)

Frequently Asked Questions (FAQ)

Common questions about April (FAQ)


Q: Is it common to feel tired or fatigued when taking April?

Studies and official information indicate that fatigue was noted as an adverse reaction in clinical trials for Premenstrual Dysphoric Disorder (PMDD). This was noted in a small percentage of participants during specific clinical trials. Such findings reflect outcomes observed within a study, not necessarily the general experience.

Q: Is it possible for April to interact with birth control pills?

The regulatory documents provide specific, non-directive instructions for health care professionals on how to switch a patient from other types of hormonal birth control (such as pills, patches, or rings) to April. Additionally, for certain starting regimens, regulatory rules outline when a non-hormonal backup method must be used for the first seven consecutive days to support the intended contraceptive outcome.

Q: Are there any known requirements for blood tests while on April?

The regulatory labeling advises that individuals with prediabetes or diabetes should be carefully monitored due to the drug’s potential effect on glucose tolerance. Official information notes that certain laboratory tests, including those measuring binding globulins, may be affected by the estrogen component. Therefore, monitoring may be required.

Q: Where can I find the official regulatory document (like a package insert) for April?

The most up-to-date official regulatory information, known as the FDA-approved product labeling, can be found on government websites. Authoritative sources include the US National Institutes of Health’s DailyMed database and the FDA’s Drugs@FDA database.

Q: Is there a Black Box Warning associated with April in the US?

Yes, the US Food and Drug Administration (FDA) label contains a Boxed Warning. This warning highlights the increased risk of serious cardiovascular events, particularly for women over 35 years of age who smoke.

Q: How is April eliminated from the body?

According to the official product information, the components of April are processed (metabolized) in the liver. The drug and its breakdown products are then eliminated from the body primarily through both the urine and the feces.

Q: Is April a controlled substance?

Official regulatory documents classify April (Ethinyl Estradiol and Levonorgestrel) as a prescription-only drug. It is not scheduled under the US Controlled Substances Act (CSA), which is the governmental framework for regulating controlled substances.

Q: What does 'contraindication' mean in the context of April?

In regulatory documents, a contraindication is an absolute prohibition. It means the drug is generally advised not to be used if a person has a specific condition, such as a history of blood clots or severe liver disease, because official data shows the risks outweigh any potential benefit in that patient group.

Q: Is it possible to be allergic to April?

The official patient information warns about the risk of allergic reactions. The regulatory information describes when emergency medical help may be needed if signs of an allergic reaction occur, such as hives or swelling of the face, lips, tongue, or throat.

Q: Are there specific rules about discontinuing the use of April?

Regulatory guidelines state the drug must be stopped at least four weeks before and through two weeks after major surgery to mitigate the risk of blood clots. It is also noted that changes to treatment may be considered if severe depression occurs or is exacerbated.

Q: Is April available in different strengths?

Yes, the combination of Levonorgestrel and Ethinyl Estradiol is available in multiple dose strengths and various cycle configurations. These configurations include products with a consistent dose throughout the cycle (monophasic) and those with changing doses (triphasic).

Q: Are the side effects of April generally considered mild?

The official drug profile includes both common adverse reactions (such as headache and nausea) and a warning about rare, but serious risks. Serious documented risks include blood clots (VTE/ATE), stroke, and heart attack. The safety profile encompasses a wide range of documented outcomes.

Q: Can April cause issues with my liver or kidneys?

Regulatory documents state the medication is contraindicated (absolutely prohibited) in individuals with severe liver disease, such as tumors or decompensated cirrhosis. It is noted that the medication may be stopped if jaundice (yellowing of the skin) occurs. Routine warnings for kidney issues are not typically noted.

Q: Do side effects typically get better over time after starting April?

Official information notes that unscheduled bleeding (spotting or breakthrough bleeding) often occurs during the first three months of use. Regulatory documents indicate that this symptom may often resolve over time or with a change in the product.

Q: How long does it usually take before I might notice April working?

For women starting on a Sunday regimen, official instructions state that a non-hormonal backup method must be used for the first seven consecutive days of taking the active pills. This period supports the intended contraceptive effect.

Q: What is the expected timeline for April to reach its full effect?

For non-contraceptive uses, such as managing acne or hirsutism (excessive hair growth), clinical studies tracked gradual improvements. The regulatory data notes that seeing a measurable or 'full' effect typically required a minimum follow-up duration of six months or longer.

Q: Has there been any long-term research on the use of April beyond a year?

Yes, the evidence base for contraception includes large-scale observational studies that track usage over many years. However, the regulatory analysis states that follow-up durations for many symptom-focused studies (e.g., PMDD, acne) were more limited in length.

Q: Why do some people report feeling nauseous when they first start taking April?

Nausea is classified as a Very Common or Commonly documented adverse reaction in regulatory documents. This may be related to the body adjusting to the synthetic hormones, though the label does not provide a specific physiological explanation.

Q: What does the latest research suggest about April's use in combination therapy?

The official information focuses primarily on the drug's effect on the exposure of co-administered drugs like Lamotrigine and Thyroid/Corticosteroid replacement therapies. The regulatory data addresses the potential metabolic impact, rather than specific efficacy research for co-drug combinations.

How should April be stored and disposed of?

How to Store and Dispose of April

Official regulatory guidelines mandate specific conditions for storing April (Ethinyl Estradiol/Levonorgestrel) tablets to maintain the product's quality, strength, and purity until the expiration date.

Storage Requirements

Condition Requirement
Temperature Store at Controlled Room Temperature (typically 20 C to 25 C / 68 F to 77 F).
Protection Keep in the original, closed container and protect from light, excess moisture, and freezing.
Safety The medicine must be kept out of the reach of children.

Disposal Instructions

Expired or unused tablets should be disposed of through a drug take-back program. As this medication is not on the official FDA flush list, it must not be flushed down the toilet. If a take-back option is unavailable, the tablets must be mixed with an unappealing substance (like dirt) in a sealed container and placed in the household trash, with all personal information removed from the label.

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

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