Vermagest

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Vermagest

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Medically reviewed

Marina Burgos

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 Vermagest

Quick Facts

Property Description
Active ingredient Estradiol benzoate and Progesterone (Combination); Levonorgestrel (Single)
Form Oil solution for injection; Oral tablet
Pharmacological class Sex Hormones and Modulators of the Genital System
Common use Emergency contraception; Hormonal cycle management
Origin Semi-synthetic (Levonorgestrel) and Natural derivatives

Classification and Dual Composition of Vermagest

Vermagest is a pharmaceutical brand developed by Vijosas Laboratorios, primarily marketed in Central America, that is classified within the systemic Sex Hormones and Modulators of the Genital System group.

The medication has a dual composition profile. One profile is a combination product featuring the estrogen derivative Estradiol benzoate and the naturally derived progestogen Progesterone, generally supplied as an oil solution. The second, distinct profile is a single-ingredient oral preparation containing the synthetic progestogen Levonorgestrel. The use of Estradiol benzoate, a pro-drug, in the combination formulation is a key feature that provides a longer duration of effect following an intramuscular injection, differentiating it from standard oral hormone therapy.

Forms, Origin, and General Utility

The two primary forms of Vermagest are the oral tablet and the specialized oil solution for intramuscular injection, which determines the administration route and time-release characteristics. The Levonorgestrel tablet is a progestin-only formulation clinically recognized for its role in emergency contraception.

The general utility of the preparations is to exert control over the female reproductive cycle. The single-ingredient Levonorgestrel tablet is specifically designed for emergency contraception to reduce the possibility of pregnancy after unprotected intercourse. Conversely, the combination of Estradiol benzoate and Progesterone is traditionally applied in typical use scenarios for hormonal cycle management, such as treating menstrual irregularities and other functional uterine conditions.

What side effects are possible with Vermagest?

Possible Side Effects and Safety Information

Vermagest is a medication containing a progestogen, and its official safety information is structured around common adverse reactions and essential warnings regarding serious risks.

Common Adverse Reactions

Adverse effects reported frequently include disturbances in the nervous, reproductive, and gastrointestinal systems. Common examples are headache, breast tenderness or pain, nausea, mood changes, and abdominal pain. Certain formulations or routes of administration, particularly oral use, may also be associated with central nervous system effects like dizziness or drowsiness.

Serious and Clinically Significant Risks

The most significant safety warnings relate to the risk of thromboembolic events, including deep vein thrombosis (DVT), pulmonary embolism (PE), stroke, and myocardial infarction. While rare, these risks are emphasized in official labeling. Additionally, prolonged use in certain hormonal regimens has been associated with an increased risk of specific malignancies, such as breast cancer.

Serious adverse reactions also include signs of liver dysfunction, such as jaundice or severe upper abdominal pain, and sudden vision changes, which require immediate medical attention.

Safety-Related Restrictions

Vermagest is contraindicated in individuals with a known hypersensitivity to the drug, a history of active or recent thromboembolic disorders, severe liver disease, or known or suspected hormone-sensitive malignancies. It is also contraindicated in cases of undiagnosed abnormal genital bleeding. Treatment should be discontinued if a thromboembolic event is suspected, or if the patient develops severe migraine headaches or significant vision impairment. Use requires caution in patients with a history of depression or conditions that may increase cardiovascular risk.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory documentation for the hormonal components of Vermagest outlines specific presentations and immediate actions required in the event of overdosage.

Documented Manifestations and Severity

The most frequently anticipated signs of overdosage are based on established profiles for hormonal agents. These may include Nausea, Vomiting, Headache, and Breast tenderness. Overdosage may also result in changes to the reproductive cycle, such as Heavy vaginal bleeding or spotting that may occur days after the exposure. Acute overdosage of the hormonal components is generally described as not likely to be life-threatening according to official reports.

Regulator-Mandated Emergency Action

In the event of a suspected overdosage, regulatory guidelines strictly mandate that individuals seek medical help right away and contact a Poison Control center. Management is typically symptomatic and supportive, as no specific antidote is known or documented in the prescribing information. Monitoring and care focus on managing the clinical signs and vital functions.

A significant, potentially life-threatening condition requiring immediate medical evaluation is ectopic pregnancy, which is a risk following medication use. Immediate medical attention is required if severe lower abdominal or stomach pain is experienced or if expected menses is delayed. This structured regulatory profile provides clear, non-advisory instructions on securing professional emergency care.

Therapeutic Uses of Vermagest

What Vermagest Treats: Main Uses and Benefits

The therapeutic utility of Vermagest reflects the specialized functions of its dual formulations, addressing two critical domains within female reproductive health: urgent risk mitigation and planned cycle regulation. Medicines in this category are considered relevant for managing the risk of unintended pregnancy.

The medication is commonly used to help manage primary conditions including the acute risk of conception following unprotected intercourse or contraceptive failure, and managing menstrual irregularities such as secondary amenorrhea and functional uterine bleeding. This dual application is relevant in contexts marked by increased discomfort or tension, ranging from acute risk assessment to long-term functional stability.

The combination formulation helps address symptoms related to systemic imbalance, while the single-ingredient tablet is applied for acute intervention. This supports patients during episodes of heightened discomfort and contributes to easing the overall symptom load associated with reproductive cycle disorders.


Quick Fact: Support for Symptoms of Cycle Disruption

Therapeutic Domain Symptom/Condition Addressed Primary Benefit
Acute Intervention Acute risk of conception Assists with maintaining stability
Planned Management Secondary amenorrhea, Dysfunctional bleeding Contributes to improved comfort

Eligibility and Restrictions for Use

The eligibility profile for Vermagest, a levonorgestrel-based emergency contraceptive, is defined by specific regulatory criteria detailing absolute exclusions and usage limitations.

Contraindications (Who Must Not Use)

  • Existing Pregnancy: The medication is contraindicated in women with a known or suspected existing pregnancy, as official labeling confirms it is not effective in terminating an established pregnancy.
  • Hypersensitivity: Individuals who have a known allergy or severe hypersensitivity to the active substance (Vermagest) or any of its components must not use the medicine.

Population-Specific Limitations

  • Age: Use is not indicated for pre-menarcheal females or postmenopausal women, as the product is intended for reproductive-aged women. It is available for use by all postpubertal adolescents and adults.
  • Hepatic Impairment: Caution is advised in patients with severe hepatic impairment, as data regarding the drug’s disposition in this population are limited or not established.
  • Body Mass Index (BMI): While not an absolute contraindication, official labeling acknowledges that the efficacy of the medication may be diminished in women with a high BMI (e.g., over 30 kg/m^2), which may be a factor in determining optimal use.
  • Breastfeeding: Small amounts of the substance pass into breast milk, but its use is generally considered acceptable for nursing mothers.

What should I know about interactions with other medicines?

The official regulatory documentation for Vermagest identifies specific drug interactions that necessitate alterations to co-administration or warrant caution. These interactions are primarily classified based on pharmacokinetic effects involving drug metabolism enzymes.

Clinically Significant Interactions

Interaction Mechanism Interacting Product Categories Regulatory Requirement
Decreased systemic exposure of Vermagest (e.g., via CYP3A4 induction) Strong Enzyme Inducers (e.g., certain anticonvulsants, antimycobacterials, St. John’s Wort) Use a back-up or alternative method for the duration of co-administration and for a specified period after discontinuation of the inducer.
Potential for liver enzyme elevation (ALT) Specific Hepatitis C Combinations (containing ombitasvir/paritaprevir/ritonavir, with or without dasabuvir) Contraindicated (Strictly avoid co-administration).

The most critical interaction constraint is the contraindication with certain Hepatitis C combination therapies, based on the documented risk of liver enzyme increases. The broader set of strong enzyme inducers poses a risk of reduced effectiveness for Vermagest, leading to the official requirement for patients to use supplemental protective measures.

Mechanism of Action

Vermagest (levonorgestrel) is a synthetic progestogen that acts primarily as a progesterone receptor agonist in target tissues, including the hypothalamus, pituitary gland, ovaries, and cervix. In the hypothalamus, this interaction modifies the pulsatile release of Gonadotropin-Releasing Hormone (GnRH). This alteration subsequently suppresses the release of Luteinizing Hormone (LH) from the anterior pituitary, inhibiting the normal mid-cycle LH surge.


The absence of the LH surge prevents follicular rupture, thereby inhibiting ovulation. Downstream, Vermagest induces a transformation of the cervical mucus, increasing its viscosity and impeding the mobility and passage of spermatozoa into the upper reproductive tract. Concurrently, it causes specific morphological and biochemical changes in the endometrium, including stromal pseudodecidualization and glandular atrophy, which render the uterine lining non-receptive. System-level physiological modulation involves suppression of the hypothalamic-pituitary-ovarian axis and localized changes in the reproductive tract environment.

Dosage and Administration Information

How to Use Vermagest

Vermagest is an oral emergency contraceptive taken as a two-dose regimen. Adherence to the official labeled instructions for dosing and timing is essential for proper use.

Official Administration Guidelines

Administration Scope Detail
Route Oral (by mouth)
Dosing Schedule Two 0.75 mg tablets, taken 12 hours apart, as a single course of treatment.
Timing Constraint The first tablet must be taken as soon as possible, and no later than 72 hours (3 days), after unprotected intercourse.
With or Without Food The tablets may be taken with or without food.
Age-Group Rule Available over-the-counter for women of a certain age; requirements may vary for younger individuals.

Procedural Steps

The full course involves two distinct steps, with specific instructions to follow if the first dose is not retained:

  1. Take the first 0.75 mg tablet as soon as possible after unprotected sexual intercourse. The earlier the tablet is taken, the better.
  2. Take the second 0.75 mg tablet 12 hours after taking the first dose.

Special Condition: Vomiting

If vomiting occurs within two hours of taking either the first or the second tablet, official labeling advises consulting a healthcare professional for guidance on repeating the dose, as the medicine may not have been fully absorbed.

Use Protocol Summary

The strict, two-step dosage protocol, coupled with the critical 72-hour time constraint, defines the entire official use of the medicine. This structure ensures that the specified quantity of the drug is taken within the time window deemed effective for its intended purpose.

Recent Clinical Evidence

Recent Clinical Evidence Summary

Vermagest is a combination medication containing estradiol benzoate (an estrogen) and progesterone (a progestogen), typically administered as an intramuscular injection. Research into this compound largely focuses on its historical and current applications, which include hormonal support and emergency contraception, depending on the formulation and dosage.

Use in Emergency Contraception

A specific formulation of estradiol benzoate and progesterone, which is sold under the brand name Vermagest in some regions, has been investigated for use as an emergency contraceptive when administered intramuscularly shortly after unprotected intercourse. Studies suggest that this regimen may prevent unintended pregnancy when administered within 48 to 72 hours. This evidence is primarily drawn from historical trials, which observed that the treatment successfully established contraceptive effectiveness.

Use in Menstrual Regulation

Clinical data also supports the use of the estradiol benzoate/progesterone combination for treating certain menstrual disorders, such as secondary amenorrhea (absence of menstruation) and menstrual irregularity. When used for this indication, the hormones are administered to induce a withdrawal bleed, often serving as a diagnostic test or to regulate the menstrual cycle. The full dosage required for this endometrial transformation is distinct from that used for emergency contraception.

General Findings

Across multiple studies, the combination of estradiol benzoate and progesterone has been associated with specific pharmacodynamic and pharmacokinetic profiles. Research has established the duration of action for both the estrogen and progestogen components when delivered via intramuscular injection. The findings support the regulated use of the compound for its approved indications, while comparative studies indicate that the safety and effectiveness profiles are often regimen-dependent.

Frequently Asked Questions (FAQ)

Common questions about Vermagest (FAQ)

Q: When is the absolute latest time after intercourse that I can take the first tablet?

According to the official product information, the first tablet must be taken as soon as possible, but no later than 72 hours (3 days), after unprotected sexual intercourse. Official product information indicates that the medication may be less effective when taken after this time limit.

Q: If I take Vermagest, how long will it take for my period to return to normal?

The official product information indicates that your menstrual period should usually occur around the expected date. However, it is common for menses to be slightly disrupted, sometimes arriving up to one week earlier or later than anticipated. If menses is delayed by more than 5 to 7 days, it is appropriate to consult a healthcare professional to rule out pregnancy.

Q: What should I do if I vomit exactly 3 hours after taking the first dose?

The official product label specifically provides guidance for vomiting that occurs within two hours of taking a tablet. If vomiting occurs after that specific window, official product labeling recommends consulting a healthcare professional for guidance on repeating the dose or determining the next appropriate step.

Q: Does Vermagest (Levonorgestrel) have a lower effectiveness if taken close to ovulation?

Official information indicates that this medication works primarily by preventing or delaying ovulation, which is the release of an egg from the ovary. Therefore, it may have low or no effectiveness if taken after ovulation has already occurred. Furthermore, the medication is considered ineffective once the process of implantation has begun.

Q: How many times can I safely use Vermagest in one menstrual cycle?

Official prescribing information advises that repeated use within the same menstrual cycle is not recommended due to the possibility of disturbing your regular cycle. This product is labeled for emergency use and is not intended to be used as a replacement for a regular, ongoing method of contraception.

Q: Is Vermagest an abortifacient?

No. Official regulatory documents and established medical consensus confirm that this medication is not an abortifacient. It acts to prevent pregnancy from starting, but regulatory information confirms it is not effective in terminating an established pregnancy or disrupting a fertilized egg that has already implanted in the uterus.

Q: Will taking an antibiotic decrease the effectiveness of Vermagest?

While most common antibiotics do not typically reduce the effectiveness of this medication, regulatory information advises caution with certain products. Drugs that are known to strongly induce liver enzymes (which help the body process the medication) may decrease its effectiveness. If you are starting any new medication, it is appropriate to consult a healthcare professional.

How should Vermagest be stored and disposed of?

How to Store and Dispose of Vermagest

The storage and disposal of Vermagest must strictly follow government-approved regulatory requirements for its two formulations.

Storage Requirements

Category Requirement (Official Labeling)
Temperature Store at Controlled Room Temperature, 20 C to 25 C (68 F to 77 F). Do not freeze the product.
Protection Keep the tablet in the original package to protect from light. Do not use if the seal or carton is broken.
Child Safety Keep out of the reach of children.

Disposal Requirements

Unused or expired medicine should not be disposed of via wastewater or household waste in a general manner. Disposal must be performed in accordance with local requirements for pharmaceutical waste. Used needles and syringes from the injectable formulation must be immediately placed in an approved sharps collector.

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

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