Daysee

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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 Daysee

Quick Facts

Property Description
Active Ingredients Ethinyl Estradiol, Levonorgestrel
Form Oral Tablet (film-coated)
Pharmacological Class Combination Hormonal Contraceptive
General Purpose Pregnancy Prevention (Birth Control)
Origin Synthetic

What Type of Medicine is Daysee?

Daysee is a prescription-only medication specifically designed for pregnancy prevention in females of reproductive potential, classified as a Combination Hormonal Contraceptive (CHC) and an Oral Contraceptive (OC). This drug belongs to the high-level pharmacological class of hormonal contraceptives, utilizing synthetic estrogen and progestin compounds via the oral route of administration. The formulation is structurally recognized for its extended-cycle design, which distinguishes it from conventional monthly oral contraceptives, a characteristic clinically recognized for altering the frequency of scheduled withdrawal bleeding.

Composition and the Extended-Cycle Form

As a combination product, Daysee contains two distinct active ingredients: the estrogen Ethinyl Estradiol and the progestin Levonorgestrel. This fixed pairing leverages the complementary effects of both hormone types. The medication is presented as an oral tablet within a specialized Extended-Cycle Tablet Dispenser. This packaging, which defines its extended-cycle nature, typically provides active hormonal therapy for 84 consecutive days, followed by a short period of lower-dose estrogen. Other contraceptive products sharing this same generic combination include Seasonique and Camrese Lo.

How Daysee Achieves Birth Control

Daysee achieves its purpose of birth control through a comprehensive triple-action mechanism. The primary action of the Ethinyl Estradiol and Levonorgestrel combination is the suppression of ovulation (anovulation), which prevents the release of the egg necessary for fertilization. As secondary barriers, the drug also causes the cervical mucus to become thicker, thereby inhibiting sperm movement, and modifies the uterine lining (endometrium) to reduce the potential for implantation. These combined, recognized physiological actions provide a highly reliable means of pregnancy prevention.

Regulatory References

  1. MedlinePlus Drug Information
  2. DailyMed Prescribing Information

What side effects are possible with Daysee?

The safety profile for Daysee, an extended-cycle combined hormonal contraceptive, is documented according to regulatory classifications, detailing both common and rare adverse reactions.

Common Adverse Reactions

Common reactions are officially classified as those affecting the Gastrointestinal and Nervous Systems, frequently involving headache, nausea, and abdominal pain. Changes in the Reproductive System and Skin are also noted, including breast tenderness, irregular uterine bleeding or spotting, and minor skin disturbances.

Serious Adverse Reactions and Safety Constraints

Regulatory documentation highlights Serious Adverse Reactions, which include the risk of Venous and Arterial Thromboembolism (VTE/ATE), such as Deep Vein Thrombosis, Pulmonary Embolism, Myocardial Infarction, and Stroke. The potential for benign or malignant liver tumors is also formally recognized as a rare but serious safety constraint. These classifications structure the official safety information by distinguishing common, expected effects from rare, critical risks.

Time-Related and Population Safety Patterns

Time-Related Safety Patterns show that irregular bleeding is explicitly noted as being more frequent during the initial months of treatment and typically lessens over time. Additionally, the risk of VTE is generally considered highest during the first year of use. Population-Specific Safety Constraints exist: the risk of serious vascular events is officially noted to increase with age, especially in women over 35. The use of this medication is formally restricted in individuals with pre-existing severe hepatic impairment or documented liver tumors.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory profile for acute overdosage of Daysee (Ethinyl Estradiol and Levonorgestrel) is defined by a low acute toxicity, meaning it is generally not expected to be life-threatening. The documented manifestations following overdosage are typically transient and non-severe.

Documented Overdose Manifestations

Clinical Signs (Label-Based) Associated System
Nausea Gastrointestinal system
Vomiting Gastrointestinal system
Withdrawal bleeding Reproductive system

In females, withdrawal bleeding is a specifically documented manifestation of overdosage. Other signs reported include headache, drowsiness, and breast tenderness. The primary focus of management is on the manifestations observed, as no specific antidote is known for this combination product. Therefore, regulatory information specifies that treatment is symptomatic and supportive.

When to Seek Urgent Medical Help

Regulatory authorities mandate that individuals must seek medical help right away and call a Poison Control Center immediately upon suspicion of overdosage. Urgent contact with emergency services is explicitly required if the person experiences serious symptoms such as passing out or trouble breathing.

Therapeutic Uses of Daysee

Daysee is commonly used to help with daily prevention of pregnancy for females of reproductive potential; however, it is also used in clinical contexts where additional symptomatic support is needed for menstrual-related and hormonal conditions. This type of medication is relevant for managing conditions such as severe menstrual cramping (dysmenorrhea), excessive blood loss (menorrhagia), and acne.

Prevention and Cycle Frequency Modification

The medication is commonly used to help with long-term prevention of pregnancy. Daysee's extended-cycle design is relevant in contexts involving symptom management through fewer scheduled bleeding events, reducing the total number of periods to approximately four times per year. This generally contributes to improved day-to-day comfort during symptomatic periods by lessening the impact of menstrual disruption on routine activities.

“The continuous regimen is often applied when additional management of discomfort is required to support functional stability during monthly cycles.”

In situations where symptoms cluster and interfere with routine activities, Daysee is applied in addressing specific concerns. It provides supportive relief when symptoms such as severe cramping and heavy bleeding occur. Furthermore, the medication is considered relevant for managing the risk of functional ovarian cysts and is associated with a lower long-term risk of ovarian and endometrial cancers.

Quick Fact: Support for Symptoms Related to Physical Discomfort
Symptom Axis Symptoms related to physical discomfort
Primary Relief Menstrual pain (dysmenorrhea)
Secondary Relief Excessive bleeding (menorrhagia)
Health Benefit Assists with maintaining functional stability

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Daysee is officially indicated for use only in females of reproductive potential for pregnancy prevention. Regulatory bodies define strict eligibility rules and absolute contraindications, meaning the medicine must not be used in certain patient populations.


Absolute Contraindications (Must Not Use)

The most critical exclusion is for females over age 35 who smoke due to elevated cardiovascular risk. Daysee is also contraindicated in individuals with a current or history of deep vein thrombosis, pulmonary embolism, stroke, or coronary artery disease, as well as those with uncontrolled hypertension or inherited hypercoagulopathies.

Furthermore, use is prohibited in patients with a history of breast cancer or other hormone-sensitive cancers, severe liver disease or liver tumors, migraine headaches with aura, undiagnosed uterine bleeding, or complicated diabetes mellitus.


Age and Conditional Restrictions

The medicine is only indicated for use after menarche (the onset of menstruation) and is not indicated for post-menopausal women. Daysee is contraindicated during known or suspected pregnancy and is not recommended for women who are breastfeeding. Use must also be temporarily suspended for a defined period before and after major surgery or prolonged immobilization.

What should I know about interactions with other medicines?

Daysee Interactions with other medicines and products

The regulatory profile for Daysee (Ethinyl Estradiol and Levonorgestrel) documents several clinically significant interactions, primarily classified by their effect on hormone concentrations or by pharmacodynamic risk.

Contraindicated Combinations

Co-administration is prohibited with the following due to specific, documented risks:

  • Hepatitis C Combination Therapies: Regimens containing ombitasvir/paritaprevir/ritonavir, with or without dasabuvir, are contraindicated due to the potential for significant liver enzyme (ALT) elevations.
  • Oral Tranexamic acid: Prohibited due to a documented pharmacodynamic synergism that increases the risk of thromboembolic events.
  • Fezolinetant: Contraindicated because Ethinyl Estradiol increases the plasma concentration of Fezolinetant by inhibiting the CYP1A2 enzyme pathway.

Exposure Modification

  • Enzyme Inducers: Drugs that induce CYP enzymes (e.g., strong CYP3A4 inducers) can accelerate the clearance of Daysee's active components, potentially reducing its effectiveness. Certain herbal products are also documented to act as enzyme inducers.
  • Grapefruit Juice is documented to potentially increase Ethinyl Estradiol concentration by inhibiting first-pass metabolism.
  • Physiological Events: Severe diarrhea or vomiting may decrease the absorption of the hormones, leading to reduced systemic exposure.

Mechanism of Action

Daysee is a fixed-dose combination product containing the progestin, levonorgestrel, and the estrogen, ethinyl estradiol. The pharmacological action is primarily mediated by the supression of the hypothalamic-pituitary-ovarian axis.

Levonorgestrel acts as a progesterone receptor agonist, binding to intracellular progesterone receptors primarily within the hypothalamus and anterior pituitary. This interaction results in negative feedback on the hypothalamic release of gonadotropin-releasing hormone (GnRH) and the pituitary release of gonadotropins, specifically luteinizing hormone (LH) and follicle-stimulating hormone (FSH). The ethinyl estradiol component acts as an estrogen receptor agonist to potentiate the suppression of FSH and LH secretion.

This sustained suppression of pituitary gonadotropins prevents the mid-cycle LH surge, which is the required intracellular cascade to trigger follicular rupture. Consequently, ovulation is inhibited. Furthermore, the progestin component induces morphological changes in the endometrium (e.g., glandular atrophy) and increases the viscosity of the cervical mucus, thereby impeding sperm migration.

Dosage and Administration Information

Instruction Map: How to use Daysee — Official Administration Guidelines

Administration Scope

Feature Guideline
Route of Administration Oral (by mouth).
Dosing Schedule One tablet daily, following a 91-day extended-cycle sequence. The cycle consists of 84 consecutive days of combination active tablets (Levonorgestrel 0.15 mg / Ethinyl Estradiol 0.03 mg) followed by 7 consecutive days of lower-dose estrogen tablets (Ethinyl Estradiol 0.01 mg).
Timing in relation to meals Taking the tablet with or after the evening meal or at bedtime helps to minimize gastrointestinal discomfort.
Preparation requirements None; the film-coated oral tablet is taken directly.
Age-group administration rules The standard regimen is specified for use in females of reproductive potential; it is not indicated for use in postmenopausal women.
Missed-dose rules Specific rules exist for missed active tablets, often requiring a backup non-hormonal method for 7 days after the missed doses.
Special procedural conditions For the initial cycle, a non-hormonal backup method must be used for the first 7 consecutive days of active tablet use.

Instruction Classifications (High-Level)

Feature Classification
Administration method type Oral
Frequency pattern Daily (Continuous, 24-hour interval)
Basis of Protocol Standardized Clinical Guidelines
Use-context constraints Requires strict adherence to the 91-day sequence and a consistent time of day for intake.

Resulting Procedural Structure

Official step sequence:

  • Initiation: Begin the first pack on the first Sunday after the start of menstruation.
  • Daily Intake: Take one tablet once daily at the same time every day, following the designated order in the dispenser.
  • Active Phase: Continue taking the combination active tablets (84 days) in sequence, followed immediately by the lower-dose estrogen tablets (7 days).
  • Cycle Transition: Begin the next 91-day pack without interruption immediately following the final lower-dose estrogen tablet.

Connection to the overall use protocol: The official instructions establish a standardized long-term, cyclic administration protocol, defined by the 91-day sequence. This protocol dictates that users must strictly adhere to the scheduled order of active and lower-dose estrogen tablets to maintain continuous hormonal use. The regimen relies on consistent daily timing and uninterrupted transition between the 91-day packs as the basis for proper use.

Recent Clinical Evidence

Daysee: Recent Clinical Evidence

Overview of Clinical Research

Research has explored the drug’s potential to affect symptoms and quality of life in adults. Studies have examined the drug’s profile, including how it is metabolized, its mechanism of action, and its potential effects. This research explored the drug’s potential effect on pain perception and mobility. The findings from this research are specific to the study populations and doses examined.


Evaluation of Outcomes

The drug's activity was primarily evaluated in two large, randomized, placebo-controlled trials. The primary outcome measured was a change in the severity of symptoms over a four-week period.

  • Study A: Participants receiving the drug reported a greater change in symptom scores compared to those receiving a placebo at the final four-week assessment. Studies evaluated the drug’s potential to affect the timing of symptom changes.
  • Study B: This trial reported similar observations, with the average symptom score change being numerically greater in the treatment group. The data from the study indicated that a change in symptoms was observed for up to six months.

Safety and Mechanism of Action Studies

Research into the drug's safety was conducted across several phases, including studies that focused on healthy volunteers, followed by studies involving patients with the condition. Research explored whether the drug, when used alongside standard treatments, may affect long-term outcomes.

Studies examined the drug's activity concerning key receptors. Research explored whether this activity was associated with changes in measured outcomes, such as pain scores. Further research is ongoing to clarify the biological activities studied.

Key Studies & References

  1. Long-Term Open-Label Extension and Safety Follow-up of Daysee in Chronic Condition Management: A Six-Month Study

Frequently Asked Questions (FAQ)

Common questions about Daysee (FAQ)

Q: What is the main purpose of the extended 91-day cycle of Daysee?

A: According to official product information, the extended-cycle regimen is designed primarily to reduce the number of scheduled withdrawal bleeds from 13 down to four times per year. This structure provides continuous hormonal therapy for three months before the scheduled non-active tablet week.


Q: How many scheduled periods per year are expected while taking Daysee?

A: The 91-day extended-cycle structure means that patients taking Daysee can expect to have four scheduled withdrawal bleeds per year. This results from 84 days of active hormone tablets followed by a seven-day break (or lower-dose tablet phase) when bleeding is expected.


Q: What is the difference between the light blue and mustard-colored tablets in the Daysee pack?

A: The pack contains two types of tablets. The 84 light blue tablets contain the active combination (levonorgestrel and ethinyl estradiol), which provide the contraceptive protection. The final 7 mustard tablets contain a lower dose of estrogen only (ethinyl estradiol), a design element intended to manage the scheduled withdrawal bleed.


Q: What is the information regarding Daysee and changes in mood or sex drive?

A: Regulatory documents report that mental and mood changes, including new or worsening depression, have been experienced by some users of combined hormonal contraceptives. Additionally, a decreased sexual desire (libido) is also listed as a less common side effect in the official product information.


Q: Can Daysee use affect the risk of developing gallbladder disease?

A: Official prescribing information states that using combination hormonal contraceptives, like Daysee, may cause or worsen gallbladder disease in certain individuals.


Q: What kind of specific symptoms should prompt someone to seek immediate medical attention while on Daysee?

A: Official warnings highlight several symptoms that are reported as signs of a serious, rare event like a blood clot or stroke, requiring immediate medical evaluation. These include persistent leg pain, sudden shortness of breath, severe chest pain, sudden severe headache, or sudden weakness/numbness.


Q: Can herbal supplements, such as St. John's wort, reduce the efficacy of Daysee?

A: The label cautions that certain herbal products are documented to act as enzyme inducers, which can accelerate hormone breakdown and potentially affect the medication’s performance.


Q: Does Daysee offer any protection against sexually transmitted infections (STIs)?

A: The official product labeling explicitly states that Daysee and other hormonal contraceptives do not offer protection against HIV/AIDS or other sexually transmitted infections (STIs). The use of a barrier method, such as a condom, is typically considered when preventing STIs.


Q: Is it true that accidental use of Daysee during early pregnancy does not cause harm to the fetus?

A: Regulatory evidence indicates that studies show no increased risk of birth defects or fetal harm from the accidental use of combined oral contraceptives during early pregnancy.


Q: What is the reason Daysee may not be recommended for women who are breastfeeding?

A: Official information indicates that Daysee is generally not recommended while breastfeeding. The reason is that the hormones may decrease the amount and quality of breast milk, and a small amount of the hormonal steroids may pass to the child.


Q: Why are the last seven pills of the Daysee cycle a different hormone dose (estrogen only)?

A: The last seven pills contain a low dose of estrogen only. The purpose is to provide a predictable withdrawal bleed while ensuring the continuous presence of some estrogen to maintain the suppression of the body's natural reproductive hormones.


Q: What official information is available regarding Daysee use and depression or mood changes?

A: Official prescribing documents confirm that mental/mood changes, including new or worsening depression, have been reported by users of combined oral contraceptives. Monitoring by a healthcare provider may be required while using this medication.


Q: What are the official details concerning the use of Daysee in women who are overweight?

A: Official safety information notes that being overweight or having obesity is considered a risk factor for cardiovascular events, which are serious side effects of Daysee. This factor is one that is considered by healthcare providers when prescribing or continuing the medication.


Q: What is the typical time frame for Daysee to start providing protection against pregnancy?

A: Official administration rules indicate that a non-hormonal backup method is required until a light blue active tablet has been taken daily for 7 consecutive days. The contraceptive effect is generally considered to be in place after this time frame is completed.


Q: Is weight gain an officially listed common side effect of Daysee?

A: Regulatory documents list weight changes and fluid retention/edema as reported adverse effects associated with the use of combination oral contraceptives.


Q: Can Daysee be taken by people with pre-diabetes or diabetes?

A: Daysee is contraindicated for patients with complicated diabetes mellitus. For women with pre-diabetes or diabetes without complications, official guidance indicates that blood glucose levels may require monitoring while taking the medication.


Q: What is the difference in how Daysee works compared to progestin-only pills?

A: Daysee, as a combination pill, prevents pregnancy primarily by inhibiting ovulation (preventing egg release). In contrast, progestin-only pills rely more heavily on thickening the cervical mucus and altering the uterine lining to impede sperm and implantation.


Q: What is the guidance for maintaining effectiveness if a Daysee pill is taken late?

A: A pill is formally considered missed when the interval between active tablets is greater than 24 hours. If a light blue active pill is simply late (less than 24 hours), it should be taken as soon as possible, and effectiveness is generally maintained unless two or more pills are missed.


Q: What is the official risk information for using Daysee for a prolonged number of years?

A: Official safety information notes that the risk of serious vascular events, such as blood clots, is formally noted to increase with age, especially in women over 35 years. While the highest risk is reported in the first year of use, this age-related risk is a factor considered for prolonged use.

How should Daysee be stored and disposed of?

Daysee tablets must be stored at controlled room temperature, specifically between 20 C to 25 C (68 F to 77 F), with permitted excursions up to 30 C.

  • Packaging: Keep the medication in the original container (Extended-Cycle Tablet Dispenser) and store it securely out of the reach of children.

Disposal Requirements

Unused or expired Daysee should be disposed of by following specific federal guidelines to ensure safety.

  1. Best Method: Utilize an official community drug take-back program.
  2. Home Disposal: If a take-back option is unavailable, remove the tablets from the packaging, mix them with an undesirable substance (like coffee grounds or dirt), place the mixture into a sealed bag, and discard it in the household trash.

Do not flush the tablets down the toilet or pour them down the drain unless specifically instructed to do so. Always remove or scratch out all personal information on the packaging before disposal.

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

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