Norgeston

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Medically reviewed

Rosario Oropesa

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 Norgeston

Quick Facts

Property Description
Active ingredient Levonorgestrel (30 micrograms)
Form Oral tablet
Pharmacological class Progestogen-Only Contraceptive (Mini-Pill)
Common use Systemic prevention of pregnancy (Birth Control)
Origin Synthetic steroid (Gonane/Second-Generation Progestin)

Norgeston: Defining the Progestogen-Only Contraceptive

Norgeston is a prescription-only oral contraceptive tablet, classified as a Progestogen-Only Contraceptive (POC), which is commonly referred to as the Mini-Pill. This classification places the medicine in the pharmacotherapeutic group of Progestogens (ATC code: G03AC03) and is intended for continuous systemic use to prevent pregnancy. As a branded product manufactured by Bayer plc, Norgeston offers a single-ingredient hormonal formulation.

The core differentiating factor of Norgeston within the POC class is that it contains the second-generation progestin Levonorgestrel and completely lacks estrogen. This makes it a clinically recognized option for patients who have contraindications to estrogen-containing products, such as those with certain vascular risk factors.

Composition and Origin: The Synthetic Levonorgestrel

The sole active pharmaceutical ingredient in Norgeston is 30 micrograms of Levonorgestrel, a synthetic steroid that mimics the activity of the natural hormone progesterone. Levonorgestrel is categorized as a gonane-derived progestogen, and its synthetic origin ensures rapid and complete absorption following oral administration.

Crucially, Norgeston is a monotherapy, meaning its entire contraceptive effect is derived exclusively from the properties of the progestin Levonorgestrel. This single-hormone composition achieves its efficacy through continuous daily dosing. The tablets deliver the micronized Levonorgestrel via the oral route of administration using standard solid excipients.

General Purpose: Systemic Contraception

The general purpose of Norgeston is to achieve systemic contraception, serving as a continuous hormonal method for the effective prevention of pregnancy. This objective is realized through the continuous application of its primary progestational effects within the reproductive system.

These actions involve the continuous thickening of the cervical mucus and alteration of the uterine lining, which combine to create conditions unfavorable for fertilization and subsequent implantation. The utility of Norgeston is therefore strictly focused on providing a daily, highly effective means of pregnancy prevention for women of childbearing age.

Regulatory References

  1. Levonorgestrel - StatPearls - NCBI Bookshelf
  2. WHO Model List of Essential Medicines

What side effects are possible with Norgeston?

Possible Side Effects and Safety Information

This section outlines the adverse reactions and safety restrictions for Norgeston (levonorgestrel 30 mu g progestogen-only pill), based on authoritative government regulatory documents.

Adverse Reactions by Frequency (Selected)

Classification Examples of Documented Reactions
Common ((geq 1/100) to (< 1/10)) Headache, dizziness, nausea, vomiting, depressed mood, changes in vaginal bleeding (e.g., irregular bleeding, amenorrhoea), weight changes, decreased or increased libido.
Very Rare ((< 1/10,000)) Severe allergic reactions (e.g., swelling of the face/throat), skin and subcutaneous tissue disorders (e.g., rash, pruritus).

Adverse reactions are also classified by the System-Organ-Class affected, including Psychiatric Disorders, Nervous System Disorders, Gastrointestinal Disorders, and Reproductive System and Breast Disorders.

Serious Adverse Reactions

The label documents specific rare but clinically significant risks, including Thromboembolic Events (such as Deep Vein Thrombosis or Pulmonary Embolism) and the risk of Benign and Malignant Liver Tumours in rare cases. The possibility of Ectopic Pregnancy must also be considered in women who become pregnant or report severe lower abdominal pain.

Safety Restrictions and Special Populations

  • Contraindications: Norgeston is formally restricted in the presence of certain conditions, including known or suspected pregnancy, current or history of sex-steroid influenced malignancies (e.g., breast cancer), severe liver disease (until function is normal), and undiagnosed abnormal vaginal bleeding.
  • Dose/Exposure Patterns: Irregular bleeding and spotting may continue for more than the initial few months. The risk of having a blood clot may be slightly increased, especially in the first year of taking it.
  • Lactation: Small amounts of progestin pass into breast milk, but use is generally considered compatible, though caution is noted. The drug is not indicated for use in elderly women (post-menopause) or before the first menstrual bleeding.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory profile for Norgeston (Levonorgestrel 30 microgram) is restricted to the documented clinical manifestations and the required emergency management approach in cases of overdosage.

Documented Overdose Presentations

The official prescribing information states that an intake exceeding the normal prescribed regimen may lead to several potential physical signs. These include the gastrointestinal symptoms of nausea and vomiting. Additionally, mild vaginal bleeding is noted as a specific clinical manifestation associated with overdosage. Regulatory documentation suggests these symptoms are generally non-severe, and there are no official reports detailing serious damage to health caused by an overdose of this particular formulation. No population-specific overdose notes are listed in the official label.

Emergency Response and Management

The mandated emergency action is strictly defined by the fact that no specific antidote is known to exist for Levonorgestrel overdose. Consequently, management is strictly limited to symptomatic treatment. Urgent medical assessment should be sought immediately upon the occurrence of any documented manifestation. Seeking assistance ensures that the only mandated procedure—supportive and symptomatic treatment—can be provided to effectively manage the overdose symptoms, consistent with official regulatory guidelines for drug overexposure.

Therapeutic Uses of Norgeston

What Norgeston Treats: Main Uses and Benefits

The primary role of Norgeston (the Progestogen-Only Pill containing levonorgestrel) is to provide continuous systemic contraception, which is used to address the risk of unintended pregnancy for women of reproductive age. This medication is considered relevant in clinical settings that require long-term pregnancy prevention.

Norgeston is commonly used to help manage the risk of unintended pregnancy, and it is relevant for easing certain symptoms related to physical discomfort such as excessively heavy bleeding (menorrhagia) and menstrual pain (dysmenorrhea).

Contraceptive Support in Specific Clinical Scenarios

This medication is particularly applied in scenarios where estrogen is medically advised against, serving as a hormonal option for women with conditions like certain vascular risk factors or high blood pressure where combined pills are considered inappropriate. It is also a relevant contraceptive option for new mothers and women who are breastfeeding, supporting family planning without introducing estrogen that may interfere with milk production. This offers support that assists with fertility management and helps with maintaining general well-being for these patient groups.

“This application supports the patient during difficult episodes by easing distress.”

Management of Menstrual Symptom Patterns

Continuous use of Norgeston may confer secondary benefits in managing certain menstrual symptoms. By addressing the overall symptomatic burden, this use is applied in contexts where patients experience symptoms that become intense or disruptive. This may contribute to enhanced comfort during symptomatic periods, helping patients cope more steadily with symptom fluctuations.


Quick Fact: Symptom Support

Property Description
Primary Therapeutic Goal Continuous systemic contraception (addressing the risk of unintended pregnancy)
Symptom Domains Addressed Symptoms related to physical discomfort, specifically heavy menstrual bleeding and menstrual pain.
Key Clinical Scenarios Contraception for women with medical restrictions against estrogen, and during the postpartum/lactation period.

Eligibility and Restrictions for Use

Who Can and Cannot Use Norgeston?

Eligibility for Norgeston (Levonorgestrel 30 micrograms) is strictly defined by government regulatory documents, outlining populations who are permitted to use the medicine and those who are absolutely contraindicated.


Contraindications and Restrictions

Norgeston must not be used by individuals with the following official contraindications:

  • Known or suspected pregnancy.
  • Current or history of breast cancer or other sex-steroid influenced malignancies.
  • Severe hepatic disease where liver function values have not returned to normal, or a history of liver tumours (benign or malignant).
  • Severe diabetes with vascular changes or a history of thromboembolic processes (e.g., blood clots or stroke).
  • Undiagnosed abnormal vaginal bleeding.

Specific Population Rules

Population Group Regulatory Status
Women of childbearing age Permitted (Standard Use)
Breastfeeding Women Permitted (Not Contraindicated)
Pre-Menarche (Children) Not Indicated (Before first menstrual bleeding)
Post-Menopause (Older Adults) Not Intended for Use
Ectopic Pregnancy History Not Recommended (Conditional Use)

These rules ensure the medicine is only used by authorized populations as stipulated in the official prescribing information.

What should I know about interactions with other medicines?

The official regulatory profile for Norgeston is defined primarily by pharmacokinetic interactions involving hepatic enzyme systems, which may lead to reduced efficacy or increased toxicity of co-administered agents.

Interaction Scope

Property Description
Medicinal product categories with documented interactions Hepatic enzyme-inducing agents (e.g., anti-epileptics, anti-infectives), Progestin-sensitive compounds, Immunosuppressants.
Specific interacting medicines (if explicitly listed) Efavirenz, Cyclosporin, Ulipristal Acetate, Rifampicin, Carbamazepine, Phenytoin, Barbiturates.
Mechanistic basis of interactions (only if stated in label) Enzyme Induction: Enhanced metabolism of Levonorgestrel (CYP system). Enzyme Inhibition: Potential inhibition of Cyclosporin metabolism. Pharmacodynamic Interference: Opposing action at the progesterone receptor.

Official Interaction Statements

Co-administration with CYP3A4 enzyme-inducing agents is officially documented to enhance the metabolism and increase the clearance of Levonorgestrel. This pharmacokinetic interaction results in decreased Levonorgestrel plasma concentrations; for example, the AUC reduction noted with Efavirenz is approximately 50%. Medicines like Rifampicin, Carbamazepine, Phenytoin, and Barbiturates are included in this category. Herbal products containing Hypericum perforatum (St. John’s Wort) are also officially documented to decrease plasma levels through enzyme induction.

A separate interaction exists where Levonorgestrel may inhibit the metabolism of Cyclosporin, thereby increasing the risk of Cyclosporin toxicity. Furthermore, a pharmacodynamic conflict is noted with Ulipristal Acetate due to opposing actions at the progesterone receptor. A procedural constraint requires taking a replacement tablet if vomiting or severe diarrhea occurs within two hours of administration, addressing potential absorption interference.

Mechanism of Action

Levonorgestrel's pharmacological action results from three primary, redundant mechanistic domains, derived from its sole active ingredient, which acts as a high-affinity agonist at the Progesterone Receptor (PR). The primary peripheral action involves modulating the cervical environment: the drug acts on PRs in the cervical glands, causing a rapid, significant increase in the viscosity and density of the cervical mucus. This physiological effect creates a dense, acellular physical barrier that prevents sperm migration into the upper reproductive tract. Concurrently, continuous PR activation affects the endometrium, leading to a structural change characterized by glandular atrophy and pseudodecidualization. This secondary peripheral mechanism structurally limits the downstream physiological process of implantation by rendering the uterine lining non-receptive to a fertilized egg. Finally, the drug exerts negative feedback on the Hypothalamic-Pituitary-Ovarian (HPO) Axis, which often inhibits the Luteinizing Hormone (LH) surge and reduces the chance of ovulation. This central effect is inconsistent and complements the more reliable peripheral barrier mechanisms.

Dosage and Administration Information

How to Use Norgeston: Official Administration Guidelines

Norgeston is a prescription-only Progestogen-Only Pill (POP) containing 30 micrograms of Levonorgestrel. Its correct use is defined by strict adherence to a continuous daily schedule.


Standard Dosing and Route

Instruction Detail
Route of Administration Oral route only (swallow the tablet whole).
Dosing Schedule One tablet daily at the same time every day.
Frequency Pattern Continuous daily administration; take packs without a break.

Procedural Requirements

Starting the Treatment: The first tablet is taken on the first day of the menstrual cycle. If initiated later than day 5, additional barrier contraception is required for the first seven days.

Critical Timing: Tablets must be taken at the same time each day. Contraceptive protection is likely to be reduced if a tablet is delayed by more than three hours (> 27 hours since the last pill).

Missed Pill Management: If a dose is more than three hours late, the tablet should be taken as soon as remembered, and subsequent tablets should be taken at the correct time. Barrier contraception must be used for the next seven days. If unprotected intercourse occurred in the preceding seven days, the possibility of pregnancy should be considered.

Gastrointestinal Upsets: If vomiting occurs within two hours of taking a tablet, a replacement tablet must be taken as soon as possible. If the replacement is also delayed by more than three hours, the missed-dose rules apply (barrier contraception for seven days).

Recent Clinical Evidence

Research evidence / Overview of Studies for Norgeston

The research structure for the primary use of Norgeston was studied through Randomized Controlled Trials (RCTs) and Systematic Reviews involving healthy women of reproductive age. These studies monitored outcomes related to the prevention of pregnancy, using measures such as the Pearl Index, which provides a metric of pregnancy rates observed during the research period. Trials also explored user discontinuation patterns and adherence over short-to-intermediate time frames.

Findings describe patterns observed regarding outcomes related to the prevention of pregnancy and how patient-reported experiences evolved in the observed populations, particularly noting the occurrence of altered menstrual bleeding patterns. Research describes this formulation was evaluated in studies.


Evidence for use in Menstrual Symptom Management

Research exploring outcomes related to heavy menstrual bleeding (menorrhagia) or menstrual pain (dysmenorrhea) generally derives from observational settings, with supporting evidence summarized in clinical guidelines. Studies monitored women presenting with cycles of stability and flare-ups or those involving periods of heightened symptoms.

Findings reported measurements of patterns observed in menstrual blood loss and subjective menstrual pain intensity in women using this class of progestogen-only pills. Research provides insight into short-term changes in these symptoms.


Research Gaps and Areas of Uncertainty

A key limitation noted in the research is the reliance of outcomes related to the prevention of pregnancy on consistent use. Furthermore, data show patterns related to inconsistent ovulation suppression was observed in some studies across all users, which introduces an element of uncertainty. Comparative evidence is lacking, as there is limited information from head-to-head trials against all other available progestogen-only pills. These factors underscore that research provides context but research does not determine whether an individual will respond similarly, and the findings describe group patterns, not personal outcomes.

Key Studies & References

  1. ABM Clinical Protocol #13: Contraception During Breastfeeding, Revised 2015
  2. Progestogen-only pill - Synthesized Efficacy and Mechanistic Data (General Medical Review)

Frequently Asked Questions (FAQ)

Common questions about Norgeston (FAQ)


Q: How is Norgeston different from other progestogen-only pills?

Official product information classifies Norgeston as a traditional Progestogen-Only Pill (POP) containing levonorgestrel. The distinguishing factor when compared to some newer progestogen-only pills relates to the administration requirements. Levonorgestrel-based pills like Norgeston are defined by a three-hour window for daily dosing.


Q: What is the typical time frame to see the expected effects of Norgeston?

The primary protective effect is described as being established within seven days when the tablet is started according to official guidelines. However, patient-reported effects often require an adjustment period. Side effects, such as changes in bleeding patterns, are commonly described in general safety information as stabilizing or resolving within the first few months of continuous use.


Q: Have people reported changes in weight while taking Norgeston?

Yes, regulatory documentation classifies weight changes as a common documented adverse reaction. However, research evidence does not consistently demonstrate that progestogen-only pills cause weight gain, although this effect is often noted in initial reports.


Q: Is there a link between Norgeston use and headaches?

Headache is listed as a common documented adverse reaction in official product information. Furthermore, regulatory documents note that caution is required for individuals who suffer from migraines, as this condition may potentially be made worse by taking the pill.


Q: Does taking Norgeston increase the risk of blood clots?

Official documentation describes that the risk of experiencing a blood clot may be slightly increased, particularly during the first year of use. These events, which include Deep Vein Thrombosis or Pulmonary Embolism, are classified as rare but clinically significant risks.


Q: How might Norgeston interact with commonly used over-the-counter pain relievers?

Regulatory drug interaction warnings primarily focus on prescription medicines, hepatic enzyme inducers, and and St. John's Wort. Official documentation does not typically include specific warnings indicating that common over-the-counter pain relievers (such as paracetamol or ibuprofen) significantly interfere with Norgeston's primary action.


Q: Can Norgeston's actions be reduced by certain herbal supplements?

Yes. Official regulatory documents specifically warn that herbal products containing Hypericum perforatum (St. John’s Wort) can reduce the concentration of the active ingredient, Levonorgestrel, in the blood. This reduction in the level of the hormone may decrease its intended action.


Q: What is the function of the inactive ingredients found in Norgeston tablets?

The inactive ingredients, or excipients, are components like lactose monohydrate and corn starch. These ingredients serve to give the tablet its form, stability, and structure to allow the active ingredient (Levonorgestrel) to be swallowed and properly absorbed.


Q: Why is it important to take Norgeston at the same time each day?

The daily timing is specified because the drug is formulated to maintain consistent hormone levels. If the tablet is delayed by more than three hours, the level of the active hormone may fall below the amount needed to maintain the primary protective effect, increasing the potential for an unintended pregnancy.


Q: How long does the progestogen from Norgeston stay in the system?

Pharmacokinetic studies documented in the official regulatory profile describe the active ingredient, Levonorgestrel, as having a terminal elimination half-life of approximately 34 hours. This means it takes about 34 hours for the amount of the drug in the body to reduce by half. Excretion occurs primarily through the urine and faeces.


Q: Can Norgeston be used by women who smoke?

Regulatory documents list smoking as a factor that increases the risk of a blood clot and advise that Norgeston may be less suitable for women who smoke, especially in combination with other cardiovascular risk factors. This factor is one of many evaluated during the authorization process.


Q: What types of prescription medicines are known to potentially interact with Norgeston?

Official prescribing information groups interacting medicines into categories based on their mechanism of action. These include Hepatic Enzyme-Inducing Agents (which decrease Norgeston’s effectiveness by speeding up its breakdown), and agents whose metabolism may be inhibited by Norgeston, such as the immunosuppressant Cyclosporin.


Q: What is the general consensus in the medical literature about the reliability of Norgeston?

Studies and official information indicate that when Norgeston is used correctly, the overall effectiveness of Progestogen-Only Pills for the prevention of pregnancy is described as high. Research evidence describes effectiveness rates potentially above 99% when the medicine is used correctly and consistently.


Q: Are there any common reasons why a healthcare provider might switch a patient from a different pill to Norgeston?

As Norgeston contains no estrogen, one common reason noted in medical literature for prescribing it is when a patient has a health condition that contraindicates the use of estrogen-containing products. Examples include certain vascular risk factors or specific types of migraines.


Q: What is the typical timeframe for a person's monthly cycle to return to its previous pattern after stopping Norgeston?

Official literature notes that the Progestogen-Only Pill does not typically delay the return of the menstrual cycle to its previous pattern. For women seeking pregnancy, most women who discontinue the mini-pill are reported in studies to become pregnant within six months.


Q: Are there special considerations for Norgeston use in women with diabetes?

Norgeston is formally contraindicated in cases of severe diabetes with existing vascular changes. For patients with non-severe diabetes, regulatory documents list the condition as one that requires consideration, as it could potentially be made worse by taking the pill.


Q: Is it normal to feel nauseous when first starting Norgeston?

Nausea and vomiting are listed as common documented adverse reactions in the safety information. These effects are often noted by users during the initial period of adjustment when starting the medicine, alongside other temporary side effects.


Q: Can Norgeston be taken if I am actively breastfeeding?

The use of Norgeston is generally described as compatible with breastfeeding. Official information indicates that the active ingredient passes into the breast milk in small amounts but is not known to adversely affect the health or development of the infant or the milk supply.


Q: Is there a documented risk of ovarian cysts associated with Norgeston?

Official patient information notes that there is a possibility of developing fluid-filled sacs on the ovaries (ovarian cysts) while taking Progestogen-Only Pills. These cysts are typically harmless, non-cancerous, and often disappear without specific treatment.


Q: Can alcohol consumption interfere with how Norgeston works?

Official drug information includes general cautions about using alcohol while taking prescription medicines. However, there are no specific, documented warnings in regulatory documents indicating that moderate alcohol consumption significantly reduces the effectiveness of Norgeston.

How should Norgeston be stored and disposed of?

How to Store and Dispose of Norgeston Tablets

The storage and disposal of Norgeston (levonorgestrel 30,mu g) tablets must adhere to official regulatory requirements to ensure product stability and safety.

Storage Conditions

Norgeston is required to be stored out of the sight and reach of children. The official documentation specifies no special requirements for environmental storage, but the tablets must be kept in their original aluminium foil and PVC blister packs. The medicine must not be used after the expiry date printed on the packaging.

Disposal Instructions

To prevent environmental contamination, unwanted or expired Norgeston tablets must not be thrown away down a drain or into a bin. Patients should ask a pharmacist for guidance on proper disposal, which typically involves returning the product to a collection point for safe pharmaceutical waste handling.

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

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