Linessa 28

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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 Linessa 28

Linessa 28: Quick Facts

Property Description
Active Ingredients Desogestrel, Ethinyl Estradiol
Form Oral Tablets (Triphasic)
Pharmacological Class Combined Hormonal Contraceptive (CHC)
Primary Use Prevention of pregnancy (Contraception)
Origin Synthetic Hormones

What is Linessa 28?

Linessa 28 is a prescription-only medication that is classified as a Combined Hormonal Contraceptive (CHC). It is taken by mouth in the form of oral tablets primarily for the prevention of pregnancy. This type of medicine works by using two types of synthetic female sex hormones, an estrogen and a progestin, to regulate the menstrual cycle and disrupt the key steps necessary for conception.


Distinctive Features and Composition

The active ingredients in Linessa 28 are the synthetic hormones Ethinyl Estradiol (the estrogen component) and Desogestrel (the progestin component). Desogestrel is considered a third-generation progestogen.

This product is classified as a triphasic oral contraceptive. This means that, unlike monophasic pills where hormone levels remain constant, the amount of the progestin changes across three distinct dosing phases in the first 21 days of the 28-day cycle. The pack includes 21 active hormone tablets and 7 inactive (or reminder) tablets, which contain no hormones.


General Therapeutic Purpose

The general therapeutic purpose of Linessa 28 is contraception, or the effective prevention of pregnancy. Its use is typically recommended for women seeking long-term, reversible protection against pregnancy.

The hormones work together to create a robust, multi-pronged contraceptive effect. They achieve this primarily by inhibiting ovulation—stopping the release of an egg from the ovaries each month—and by simultaneously thickening the cervical mucus, making it much harder for sperm to pass through. The overall benefit is a highly reliable method for family planning when used consistently.

Regulatory References

  1. NIH/MedlinePlus: Birth control pills

What side effects are possible with Linessa 28?

Official Safety Profile of Linessa 28

The safety profile of Linessa 28 (desogestrel/ethinyl estradiol) is governed by formal regulatory classifications, detailing both common and serious adverse reactions as documented in official government sources like the FDA and EMA. This information strictly outlines documented risks without providing medical advice.

Frequency-Classified Adverse Reactions

Adverse reactions are categorized by how often they occur:

Classification Examples of Documented Reactions
Very Common / Common Nausea, Headache, Breast tenderness or pain, Spotting/Breakthrough bleeding, Weight change (gain or loss).
Uncommon / Less Common Vomiting, Migraine, Depression, Vaginal candidiasis, Fluid retention.

Serious Adverse Reactions

Although rare, certain clinically significant events are documented as serious adverse reactions:

  • Thromboembolic Events: Increased risk of venous and arterial thromboembolism, including Deep Vein Thrombosis (DVT), Pulmonary Embolism (PE), Myocardial Infarction (heart attack), and Stroke.
  • Hepatic Risks: Documentation of benign and malignant liver tumours and gallbladder disease.
  • Cardiovascular: Elevated blood pressure (hypertension).

Safety Restrictions and Contraindications

The drug is contraindicated (must not be used) in certain high-risk situations, as defined by regulatory labels. These include:

  • Current or history of venous or arterial thromboembolism.
  • Known or suspected sex hormone-sensitive malignancies (e.g., breast cancer).
  • Severe hepatic disease or liver tumours.
  • Use is restricted in women over the age of 35 who smoke.

Population and Exposure Considerations

The label specifies that Linessa 28 is contraindicated in pregnancy. The risk of developing blood clots is highest during the first year of use. For patients undergoing major surgery or prolonged immobilization, the medication must be temporarily discontinued due to heightened risk of thromboembolic events.

Overdose and Emergency Response

Overdose and When to Seek Help

The following information summarizes the official regulatory guidance concerning acute overdosage with Linessa 28 (desogestrel and ethinyl estradiol).

Documented Overdose Profile

Acute overdosage with Linessa 28 is generally considered not likely to cause serious ill effects or be life-threatening. The documented clinical manifestations reported in regulatory information are typically limited to hormone-related side effects.

Overdose Manifestations Risk Assessment Treatment Focus
Nausea, Vomiting Non-Life-Threatening Symptomatic Care
Withdrawal Bleeding Expected Hormonal Effect Supportive Care

Required Emergency Actions

The official instructions require specific immediate actions to be taken in the event of an overdose:

  • Seek Medical Help: The patient must seek medical help right away after a suspected or confirmed overdose.
  • Poison Control: Contacting a Poison Control Center is required to receive guidance on the next steps.

Management and Considerations

Antidote: No specific antidote is available for treating an overdose of Linessa 28. Treatment is strictly symptomatic, focused on managing the documented manifestations.

Population Note: Regulatory documents indicate that the ingestion of Linessa 28 by children has reportedly not led to serious effects.

Therapeutic Uses of Linessa 28

What Linessa 28 Treats: Main Uses and Benefits

The use of Linessa 28 (desogestrel/ethinyl estradiol) is common in contexts involving the need for systemic management and symptomatic relief across several health domains. This combination is applied in scenarios where individuals experience discomfort or require additional symptomatic support for specific gynecological and dermatological conditions.

Contraceptive Protection and Family Planning

The primary use of this medication is to provide reversible pregnancy protection. It is generally used where short-term management is appropriate for long-term protection. This level of sustained support may assist with maintaining functional stability in daily life regarding reproductive health.

Management of Menstrual Symptoms and Cycle Control

The medication is frequently used for conditions presenting with disruptive symptom patterns. It is applied in addressing symptom clusters such as severe menstrual cramping (dysmenorrhea), excessive blood loss (menorrhagia), and cycle irregularity. This supportive use may assist with coping with symptom fluctuations and contributes to easing the overall symptom load often associated with conditions like Endometriosis and Polycystic Ovary Syndrome (PCOS).

Relief from Androgen-Related Skin Issues

This medication is relevant in contexts marked by symptoms that interfere with daily functioning, including moderate to severe acne and excessive hair growth (hirsutism). It is applied in scenarios where management of these symptoms is required, offering relief that may help improve day-to-day comfort.


Quick Fact: Relief for Menstrual Distress

Symptom Domain Key Benefit
Menstrual Pain/Bleeding Provides support that helps ease the overall symptom burden, reducing discomfort and blood loss.
Cycle Control Assists with maintaining functional stability by helping to establish a predictable cycle schedule.
Androgen Symptoms Contributes to improved comfort during periods of heightened symptoms by offering symptomatic relief for acne and excessive hair growth.

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Who Can and Cannot Use Linessa 28?

Eligibility for Linessa 28 (desogestrel/ethinyl estradiol) is strictly defined by regulatory authorities and is based on a patient's pre-existing health profile. The medication is indicated for use by females of reproductive potential for the prevention of pregnancy.

Absolute Contraindications (Must Not Use)

Linessa 28 is formally contraindicated in individuals who have or have a history of certain severe conditions. This includes:

  • Thromboembolic Disorders: History of Deep Vein Thrombosis (DVT), Pulmonary Embolism (PE), Arterial Thrombosis, or known hereditary thrombophilias.
  • Cardiovascular Conditions: Cerebrovascular disease (stroke), Coronary Artery Disease, or uncontrolled hypertension.
  • Malignancy: Known or suspected hormone-sensitive cancers (e.g., breast cancer) or liver tumors.
  • Hepatic Disease: Active liver disease or severe hepatic impairment until liver function returns to normal.
  • Other Conditions: Migraine with focal aura, diabetes with vascular involvement, or undiagnosed abnormal vaginal bleeding.
Population/Condition Eligibility Status Key Restriction
Pregnancy Contraindicated Must not be used during known or suspected pregnancy.
Smoking (Age 35+) Contraindicated Women over age 35 who smoke must not use this medicine.
Lactation/Breastfeeding Not Recommended Use is generally discouraged due to potential infant effects and milk supply reduction.
Geriatric Use Not Indicated Use is not established in elderly women.

Conditional Use

Discontinuation is required at least four weeks prior to and for two weeks following major surgery or periods of prolonged immobilization to mitigate thromboembolic risk.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official interaction profile for Linessa 28 (desogestrel/ethinyl estradiol) establishes specific restrictions and defines pharmacokinetic alterations involving other co-administered substances. The co-administration of Linessa 28 is formally contraindicated with certain medicinal products used to treat Hepatitis C, specifically those containing the combination of Ombitasvir/Paritaprevir/Ritonavir, with or without Dasabuvir, or the combination of Glecaprevir/Pibrentasvir.

Pharmacokinetic Interactions

The contraceptive hormones are susceptible to hepatic enzyme induction, a pharmacokinetic interaction that accelerates their clearance and reduces their plasma concentrations. This effect is officially documented with substances such as the antibacterial Rifampin, certain anticonvulsants (including Phenytoin and Carbamazepine), and the herbal product St. John's wort. This reduced exposure carries the risk of diminished contraceptive efficacy.

Conversely, Ethinyl Estradiol can inhibit the metabolism of other drugs, resulting in an officially documented increase in the plasma concentrations of co-administered medicines, such as corticosteroids and caffeine. The contraceptive hormones are also documented to decrease the plasma concentration and effect of the anti-seizure medication Lamotrigine and oral anticoagulants.

Other Restrictions

Official prescribing information advises against the co-consumption of Grapefruit Juice due to its potential to increase Ethinyl Estradiol exposure. Furthermore, use in females over 35 years of age who smoke is a documented interaction-related contraindication based on cardiovascular risk.

Mechanism of Action

The contraceptive action of Linessa 28 is mediated by a multi-level mechanistic cascade involving Norgestimate, a progestin, and Ethinyl Estradiol, an estrogen. The primary pathway involves the negative feedback exerted by both steroid components on the hypothalamic-pituitary-ovarian (HPO) axis. Ethinyl Estradiol and Norgestimate act as agonists at their respective nuclear receptors within the hypothalamus and anterior pituitary.

This interaction suppresses the pulsatile release of Gonadotropin-Releasing Hormone (GnRH) from the hypothalamus, leading to a decreased synthesis and secretion of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) from the pituitary. The resultant suppression of the mid-cycle LH surge prevents the final maturation and rupture of the dominant ovarian follicle, thereby inhibiting ovulation. Concurrently, the progestin component induces morphological changes in the endometrium, promoting decidualization and atrophy, which modulates the uterine lining's receptivity. Furthermore, Norgestimate causes a significant increase in the viscosity and cellular density of the cervical mucus, creating a localized physical barrier that impedes sperm transit through the cervical canal.

Dosage and Administration Information

How Linessa 28 is Used

Linessa 28 is an oral medication administered as a continuous, 28-day cyclic regimen for the prevention of pregnancy. The core principle of use is taking one tablet daily by mouth at approximately the same time every day.

The medication is packaged in a 28-day blister format, which contains 21 active hormone tablets and 7 inactive (reminder) tablets. The cycle requires strict adherence to the sequential order printed on the packaging.


The Triphasic Dosing Schedule

Linessa 28 is defined by its triphasic schedule, where the dose of the progestin component, Desogestrel, is adjusted across three sequential phases during the active 21-day period, while the Ethinyl Estradiol dose remains constant at 0.025 mg:

Cycle Phase Tablet Strength (Desogestrel/Ethinyl Estradiol) Duration
Phase 1 (Days 1–7) 0.100 mg / 0.025 mg 7 days
Phase 2 (Days 8–14) 0.125 mg / 0.025 mg 7 days
Phase 3 (Days 15–21) 0.150 mg / 0.025 mg 7 days

Following the 21 days of active tablets, the next 7 days involve taking the inactive (hormone-free) tablets, after which a new 28-day pack is started immediately. The medication may be taken with or without food.

Procedural Guidelines

In scenarios where the first cycle is initiated using the Sunday Start method, guidelines typically indicate that a non-hormonal, back-up contraceptive method be utilized for the first seven days. Procedurally, the occurrence of severe vomiting or diarrhea within three to four hours of taking an active tablet is managed according to the protocol for a missed dose.

Recent Clinical Evidence

Linessa 28: Recent Clinical Evidence

Mechanism of Action

Linessa 28 is a combination oral contraceptive containing desogestrel (a progestin) and ethinyl estradiol (an estrogen). Research indicates that this combination prevents pregnancy primarily through two mechanisms:

  1. Inhibition of Ovulation: The hormones work to suppress the release of an egg from the ovary.
  2. Cervical Mucus Alterations: Changes occur in the cervical mucus, which makes it more difficult for sperm to pass through the cervix and reach the uterus.

Contraceptive Efficacy

Clinical trials have established the effectiveness of this hormonal combination for pregnancy prevention. When taken consistently and correctly, the pill is associated with a high rate of effectiveness. Pregnancy rates vary depending on consistent use, with typical use often resulting in a higher rate of unintended pregnancy than perfect use, a factor common to all oral contraceptive pills.

Safety and Non-Contraceptive Findings

Post-market surveillance and studies have reviewed the safety profile, focusing on rare but serious adverse events. The use of combined hormonal contraceptives, including Linessa 28, is associated with a small, increased risk of thromboembolic events (blood clots) compared to non-users. This risk is a primary consideration in assessing patient suitability.

Non-contraceptive effects that have been examined in studies include potential benefits such as:

  • Menstrual Cycle Regulation: Promoting more regular menstrual cycles.
  • Dysmenorrhea: Reduction in menstrual pain severity.
  • Acne: Potential improvement in pre-existing acne symptoms over several months of treatment.

Frequently Asked Questions (FAQ)

Common questions about Linessa 28 (FAQ)


Q: What makes Linessa 28 different from other 28-day birth control pills?

Linessa 28 is categorized as a triphasic combined oral contraceptive. This means that unlike pills where the hormone dose is the same every day, the amount of the progestin hormone, desogestrel, is varied across three distinct phases during the 21 active days. The amount of the estrogen, ethinyl estradiol, remains the same throughout the active cycle.

Q: How quickly does Linessa 28 start to be effective against pregnancy?

Official instructions for starting the medication generally recommend that a non-hormonal back-up method, such as a condom, be used for the first 7 consecutive days of active pill-taking. This is to help ensure reliable contraceptive effectiveness as the hormones begin to work.

Q: Can Linessa 28 help with acne or heavy periods?

Studies cited in official product labeling note potential non-contraceptive benefits associated with this hormonal combination. These benefits include the management of painful periods and improvement in pre-existing acne symptoms over several months of use. This is why doctors may prescribe it for reasons other than contraception.

Q: What are the most common minor side effects people report with Linessa 28?

Official regulatory documents classify headache, nausea, breast tenderness or pain, spotting or breakthrough bleeding, and weight change (either gain or loss) as common or very common adverse reactions. It is important to remember that not everyone experiences side effects.

Q: Is it normal to have a very light or missed period while using Linessa 28?

It is not unusual to experience lighter or shorter withdrawal bleeding while on hormonal birth control. If two consecutive periods are completely missed, regulatory guidance often advises consulting a healthcare professional to determine the cause, such as ruling out pregnancy.

Q: How long do side effects typically last after starting Linessa 28?

If minor side effects such as nausea or light bleeding occur, official patient information notes that these effects often lessen or resolve during the first 1 to 3 months of continuous use as the body adjusts to the medication.

Q: Are there any over-the-counter pain relievers that shouldn't be taken with Linessa 28?

Official labeling advises consulting a healthcare professional before combining Linessa 28 with any other medications, including non-prescription pain relievers. It is important to check for potential drug interactions that could affect either the pill's efficacy or the safety of the pain reliever.

Q: Does taking antibiotics make Linessa 28 less effective?

Some reports suggest that certain antibiotic agents, such as ampicillin and tetracycline, may reduce the concentration of the contraceptive hormones. In these cases, official guidance often suggests the use of a non-hormonal back-up method while taking the antibiotic and for a short time after treatment ends.

Q: Can Linessa 28 affect mood or cause emotional changes?

Regulatory documents list depression as an uncommon adverse reaction associated with this medication. Other reported potential side effects include changes in sexual desire. It is noted that patients should monitor their mood while using any hormonal contraceptive.

Q: Is Linessa 28 safe to use for women who have migraines?

Linessa 28 is formally contraindicated (must not be used) in women who experience migraines with focal aura. Safety in women with migraines without aura is an individual clinical consideration that requires evaluation by a healthcare professional.

Q: What happens if I miss an active pill of Linessa 28?

Missing one or more active pills requires following a specific regimen to minimize the risk of pregnancy. The necessary actions, which may include taking a pill immediately and using a back-up contraceptive, depend on when the pill was missed. The specific steps to be taken are detailed in the official patient information leaflet.

Q: Does Linessa 28 affect fertility in the long term?

Official product information notes that the return of fertility may be delayed for some time after discontinuing the pill. However, regulatory information does not report permanent impairment of fertility after stopping the pill.

Q: Can Linessa 28 change your sex drive?

Changes in sexual desire are noted as potential side effects in official patient information. This is a possible hormonal effect that may vary from person to person.

Q: Is it better to take Linessa 28 in the morning or at night?

The essential instruction for taking Linessa 28 is to take the pill at approximately the same time every day to maintain consistent hormone levels. The specific time of day (morning, noon, or night) is not mandated, but choosing a consistent time helps ensure compliance.

Q: What should I do if I vomit shortly after taking a Linessa 28 pill?

Official instructions indicate that if an active tablet is expelled due to vomiting within 3-4 hours, the situation should be managed by following the guidance for a missed dose to maintain contraceptive protection. This is because the dose may not have been fully absorbed.

Q: Does Linessa 28 protect against sexually transmitted infections (STIs)?

Official patient information explicitly states that Linessa 28, like all hormonal contraceptive pills, does not offer any protection against HIV/AIDS or other sexually transmitted infections (STIs). A barrier method, like a condom, is necessary for STI protection.

Q: Are there specific health conditions that make Linessa 28 unsafe to use?

Yes, Linessa 28 is contraindicated (must not be used) if a woman has certain severe pre-existing conditions, including a history of blood clots, specific cardiovascular diseases, hormone-sensitive cancers, and severe active liver disease. These contraindications are strictly defined in the medication's regulatory documents.

Q: How long after stopping Linessa 28 does it take for the menstrual cycle to return to 'normal'?

When the pill is discontinued, the patient's normal menstrual cycle should resume. While official information notes the return of fertility may be delayed for some time, the exact timeframe for a cycle to return to its pre-pill rhythm varies greatly among individuals.

Q: Do other medicines for epilepsy or seizures interact with Linessa 28?

Yes, regulatory documents list several anticonvulsant medications, such as phenytoin and carbamazepine, as substances that can interact with the pill. These drugs can reduce the concentration of the contraceptive hormones, which may diminish the pill's effectiveness.

Q: Can Linessa 28 cause changes in vision or contact lens comfort?

Official product labeling notes that visual changes, such as sudden partial or complete loss of vision, have been reported as rare but serious adverse events. It is also noted that contact lens intolerance may occur, which can make wearing contacts uncomfortable.

Q: Why is it important to take Linessa 28 at the same time every day?

Taking the pill at the same time every day is required to maintain the steady hormone levels necessary for the medication's contraceptive effectiveness. Consistent timing minimizes fluctuations that could potentially reduce the pill's ability to suppress ovulation.

Q: Is there a generic version of Linessa 28 available?

Linessa 28 is the brand name for this specific combination of hormones. Generic equivalents containing the same active ingredients (desogestrel/ethinyl estradiol) may be available, depending on the country's drug product listings.

Q: What is the theoretical effectiveness rate of Linessa 28 with perfect use?

Official documentation for combined oral contraceptives cites a high efficacy rate when used perfectly, typically described as less than 1 pregnancy per 100 women in one year. This rate depends entirely on consistent and correct use.

Q: Can Linessa 28 cause or worsen breast tenderness?

Breast tenderness or pain is classified in regulatory documentation as a common adverse reaction. Since the hormones affect breast tissue, patients with existing breast conditions should be evaluated by a healthcare professional, as the pill is contraindicated in cases of hormone-sensitive cancers.

Q: Are certain types of food or drinks known to interact with Linessa 28?

Official prescribing information advises specifically against the co-consumption of Grapefruit Juice. This is because the juice has the potential to increase the amount of the estrogen component, ethinyl estradiol, in the body.

Q: How does the progestin in Linessa 28 compare to other birth control pills?

The progestin component in Linessa 28 is desogestrel, which is categorized in regulatory documents as a third-generation progestogen. This classification is based on the progestin's specific chemical structure and pharmacological properties.

Q: Can people who are very overweight or obese use Linessa 28 effectively?

While regulatory documents do not list obesity as an absolute contraindication, obesity is identified as a risk factor for cardiovascular issues, including blood clots, which are a serious risk with any combined oral contraceptive. A healthcare professional is required to evaluate individual risk factors, including weight, before prescribing any combined oral contraceptive.

Q: Why might a doctor prescribe Linessa 28 for someone who isn't sexually active?

Although the primary purpose is contraception, the medication is also sometimes prescribed for non-contraceptive benefits. These include managing conditions such as menstrual cycle irregularity, painful periods, or acne, as noted in the official product information.

Q: Do any common supplements affect the absorption of Linessa 28?

Official documentation specifically warns that the herbal product St. John's wort is known to reduce the effectiveness of contraceptive steroids. Patients are advised to consult a healthcare professional regarding all supplements they are taking to avoid potential interactions.

Q: Is Linessa 28 considered a 'first-generation' or 'second-generation' pill?

The progestin component in Linessa 28 is desogestrel, which is categorized in regulatory documents as a third-generation progestogen. This classification is based on the specific chemical structure and pharmacological properties of the ingredient.

How should Linessa 28 be stored and disposed of?

Storage and Disposal of Linessa 28

Official regulatory guidelines dictate specific conditions for storing and disposing of Linessa 28 (desogestrel and ethinyl estradiol tablets) to maintain its potency and ensure safety.


Storage Requirements

Linessa 28 must be stored at controlled room temperature, specifically maintained between 15 C and 30 C. The tablets must remain in their original container or blister pack to protect the medication from light and moisture.

Classification Official Requirement Summary
Temperature Range 15 C to 30 C (Controlled Room Temp)
Container Rule Store in original packaging.
Child Safety Keep out of the reach of children and pets.

Disposal Instructions

Expired or unused Linessa 28 must not be discarded in household trash or poured down the sink or toilet. Disposal should be completed in accordance with local requirements established for pharmaceutical waste.

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

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