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Colpotrophine

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Colpotrophine

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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.

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Overview of Colpotrophine

Colpotrophine is a pharmaceutical preparation formulated for localized hormonal support, featuring the single active substance Promestriene (International Nonproprietary Name, INN).

Property Description
Active ingredient Promestriene
Form Vaginal Cream, Vaginal Capsule (Pessary)
Pharmacological class Estrogen Analog, Hormonal Agent
Origin Synthetic
Route of administration Intravaginal / Topical

Colpotrophine: Identity and Pharmacological Type

Colpotrophine is classified as a Hormonal Agent and an Estrogen Analog, with the anatomical-therapeutic designation G03CA09. The active ingredient, Promestriene, is a synthetic compound, specifically a derived estradiol diether. The chemical structure is designed to prevent its conversion into estradiol within the body, which distinguishes its therapeutic profile from systemically active estrogens.

Composition and Form for Targeted Action

The active substance Promestriene is incorporated into specialized formulations designed for direct application to the affected tissues, available as a vaginal cream and a soft vaginal capsule (pessary). These dosage forms are intended for the intravaginal or topical route of administration, allowing the medicine to be delivered to the target area. The preparation is a single-ingredient drug positioned for localized use, differentiating it from combination treatments.

General Purpose of a Localized Estrogen Analog

The general purpose of Colpotrophine is to provide localized estrogen support to address physical changes and discomfort arising from estrogen deficiency in the vulvovaginal area, such as during menopause. The formulation is designed for minimal systemic absorption, ensuring the drug primarily exerts a trophic action on the local tissues. This targeted effect is intended to support the metabolic activity and regeneration of the epithelial lining, contributing to the restoration of the tissue's structural health, elasticity, and physiological function.

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What side effects are possible with Colpotrophine?

Possible Side Effects and Safety Information

This section outlines the adverse reactions and safety information for Colpotrophine (promestriene), as documented in official government regulatory sources, without providing medical advice or instructions for use.

Frequency and Nature of Adverse Reactions

The most commonly reported side effects are localized and generally mild, reflecting the drug's intended action primarily at the application site. Regulatory documents classify these reactions by their frequency:

Classification Adverse Reaction Safety Context
Common Local irritation, pruritus (itching), burning sensation, increased vaginal discharge, vulvovaginal inflammation. These are the most frequent effects, generally mild and tolerable.
Not Known Vaginal bleeding (including menorrhagia or metrorrhagia). Added following cumulative post-marketing data review; requires documentation.

Systemic Safety and Restrictions

Colpotrophine is designed for local application with negligible systemic absorption, which limits the potential for systemic estrogen-related adverse events (like those associated with oral hormone therapy). The safety profile is defined by this local action.

Contraindications (Situations where the drug must not be used):

  • Known hypersensitivity to the active substance or excipients.
  • Confirmed or suspected estrogen-dependent malignancies (e.g., breast or endometrial cancer).
  • Presence of undiagnosed vaginal bleeding.

Population-Specific Safety Notes

The medicine is contraindicated during both pregnancy and lactation due to insufficient data to confirm safety in these specific populations, as specified in regulatory labeling.

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Overdose and Emergency Response

Overdose and when to seek help

The following information on overdose is derived from authoritative government regulatory sources concerning the pharmacological class of Estrogen Analogs.

Documented Overdose Manifestations

Official prescribing information documents specific clinical manifestations that may occur following an accidental overdose of Promestriene. Symptoms may include nausea and vomiting, headache, fluid retention, and a skin rash. A specific, delayed manifestation noted is the potential for excessive vaginal bleeding, which may present approximately two to seven days after the overdose event.

Clinical Context Regulatory Action Mandate
Symptom Recognition Seek medical help right away and contact a Poison Control Center.
Serious Presentation Monitoring of vital signs is required, and supportive measures such as intravenous fluids may be needed.

Emergency Actions Mandated by Regulators

Regulatory documents explicitly state the requirement to seek medical help right away upon suspicion of an overdose. Individuals are mandated to immediately contact emergency services and the Poison Control Center for guidance.

Supportive Treatment

Management of the overdose is defined as symptomatic and supportive treatment, as no specific antidote is documented for Promestriene. Supportive measures may include the administration of activated charcoal in extreme cases, along with necessary blood and urine tests for evaluation in the emergency setting. Continuous monitoring of vital signs is an essential requirement of the management protocol.

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Therapeutic Uses of Colpotrophine

What Colpotrophine Treats: Main Uses and Benefits

The medication is applied in managing symptoms related to estrogen deficiency, and is considered relevant for addressing vulvovaginal atrophy (VVA) and the associated Genitourinary Syndrome of Menopause (GSM). It may be part of symptomatic management to relieve atrophy and its associated symptoms.

This treatment helps address symptom clusters that interfere with daily functioning, including persistent vaginal dryness, burning, pruritus (itching), and pain during intercourse (dyspareunia). It is commonly used across conditions presenting with localized discomfort linked to atrophy. It provides support that helps ease the overall symptom burden and contributes to improved comfort during periods of heightened symptoms.

In special clinical scenarios, the medication is relevant when symptoms related to tissue functional stress are present following post-operative procedures or post-partum trauma. It is also commonly used for patient groups, notably cancer survivors, for whom localized support is required where systemic burden needs to be minimized. The therapeutic support contributes to improved comfort during periods of heightened symptoms.


Quick Fact: Support for Atrophy Symptoms

Colpotrophine is relevant for conditions where the primary therapeutic goal is the symptomatic management of estrogen deficiency in the lower genital tract, assisting with maintaining functional stability.

Regulatory References

  1. National Cancer Institute Drug Dictionary
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Eligibility and Restrictions for Use

Colpotrophine (Promestriene) is officially approved for use exclusively in postmenopausal women, representing the labeled target population for its intended application. The regulatory documents explicitly define the limits of eligibility.

The medicine is subject to strict regulatory prohibitions. It is absolutely contraindicated for any woman with a history of, known, or suspected estrogen-dependent malignancy, including certain breast or endometrial cancers. Absolute prohibition also applies to patients with known hypersensitivity to the active substance or any excipient, and to women presenting with unexplained vaginal bleeding until the cause is fully diagnosed.

For other groups, use is heavily restricted. The medicine is not recommended for women who are pregnant or breastfeeding due to insufficient data supporting its safety in these physiological states. Furthermore, use has not been established in the pediatric population (children and adolescents). Conditional use is defined by patient health: caution is advised for patients with severe hepatic impairment or specific high-risk factors for venous or arterial thromboembolic disease.

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What should I know about interactions with other medicines?

Interactions with other medicines and products

The official interaction profile for Colpotrophine (Promestriene) is defined by its design as a localized hormonal agent with minimal systemic absorption, as documented in government regulatory sources. This specialized pharmacological characteristic dictates the nature of the drug's official interaction constraints, which are primarily local rather than systemic.

Systemic Drug-Drug Interaction Profile

Official regulatory prescribing information for single-ingredient Promestriene generally does not document any clinically significant systemic interactions with other medicinal products. This is attributed to the drug’s minimal systemic exposure.

Interaction Type Regulatory Status
Pharmacokinetic (CYP-mediated) Not documented
Contraindicated Combinations None documented
Exposure-Modifying Substances None documented
Food, Alcohol, or Supplements None documented

Local Administration Restriction

The only formal interaction-related restriction is associated with the local route of administration. The simultaneous use of any other local vaginal product—including vaginal contraceptives or spermicides—is subject to restriction. This is a timing-based measure required to avoid potential physical interference that could affect the absorption of Promestriene or diminish the efficacy of the co-administered local product. No specific population-dependent interaction cautions are listed in official labeling.

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Mechanism of Action

Colpotrophine contains promestriene, a synthetic derivative and diether of estradiol. Following topical application, promestriene preferentially targets and accumulates within the local tissues of the vulvovaginal epithelium. Its primary biological target is the intracellular estrogen receptor (ER), where it acts as a selective agonist.

Upon binding to the receptor, promestriene induces a conformational change that enables the receptor complex to translocate to the nucleus. This complex then binds to specific DNA sequences known as Estrogen Response Elements (EREs), thereby modulating the transcription of target genes. This pathway modulation initiates a cascade of intracellular processes. The downstream consequences include the regulation of gene products essential for cellular proliferation, differentiation, and the synthesis of structural proteins and glycosaminoglycans within the local connective tissue. This specific action primarily regulates the biological activity necessary for the trophic restoration of the epithelial lining and underlying connective tissue without significant systemic absorption, which is conferred by the molecule’s structural ether groups.

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Dosage and Administration Information

How to Use Colpotrophine: Official Administration Guidelines

Colpotrophine (Promestriene) is a localized hormonal agent administered according to standardized usage instructions. These guidelines define the dose, method, and duration of application, excluding any clinical advice or safety information.


Administration Details

Feature Instruction
Route of Administration Strictly intravaginal for both forms, or topical to the vulvar area using the cream.
Approved Forms and Strength Available as a Vaginal Capsule (Pessary) containing 10 mg of Promestriene, or as a 1% Vaginal Cream (10 mg per gram).
Standard Dose Unit The standard unit for application is 10 mg of Promestriene.
Preparation Requirement The cream formulation must be administered using a calibrated applicator to ensure the correct 1 g dose is delivered.

Dosing Schedule and Duration

Treatment follows a two-phase regimen, which transitions from an intensive daily application to a lower-frequency maintenance plan.

Phase Frequency and Duration
Initial Intensive Phase 10 mg applied once daily (often in the evening) for a short period, typically ranging from 10 to 21 days.
Maintenance Phase Frequency is reduced to every other day (approximately three to four times weekly) for continued management.

Usage is exclusively for local administration and is not for oral ingestion. While dose adjustments for specific conditions are not widely documented, general principles for estrogen-sensitive use involve starting with a lower dose and adjusting to the minimum effective level. The necessity for continued treatment beyond the initial course involves periodic re-evaluation by a healthcare professional.

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Recent Clinical Evidence

Evidence for Use in Vulvovaginal Atrophy (VVA) and GSM Symptoms

Research has examined conditions linked to estrogen deficiency, such as Vulvovaginal Atrophy (VVA) and associated symptoms of the Genitourinary Syndrome of Menopause (GSM). Studies exploring this indication primarily involved Randomized Controlled Trials (RCTs). These trials were designed to explore outcomes related to physical discomfort and functional imbalance, using defined time intervals ranging up to twelve months.

Studies monitored how symptoms evolved in the observed populations, with a focus on patient-reported outcomes describing perceived discomfort. Specific PROs related to symptoms such as vaginal dryness, burning, pruritus, and pain during intercourse (dyspareunia) was studied for change over time. Researchers also monitored objective markers of tissue health, such as the Vaginal Health Index (VHI) score. Findings describe patterns observed in the studies related to the measurement of these markers and symptoms during the observation periods.

Evidence for Localized Support in Estrogen-Sensitive Populations

Research has explored the use of Promestriene in groups requiring localized support, such as breast cancer survivors experiencing GSM symptoms. These studies examined how the medicine was associated with changes in local symptoms and objective tissue health markers. Critically, these studies also monitored systemic hormonal levels (such as estradiol and FSH). Studies describe patterns related to the measurement of systemic hormonal levels remaining within the non-estrogenic, postmenopausal range.

Evidence Quality and Gaps

Certainty remains low for the indication related to post-operative or post-partum tissue stress; the overall evidence quality varies across studies, and comparative evidence is lacking. For all indications, follow-up durations were limited in many trials, and sample sizes were modest in the specialized populations. Limited information for long-term outcomes is a key area of uncertainty for the overall research profile.

Key Studies & References Efficacy and Safety of Promestriene in the Treatment of Genitourinary Syndrome of Menopause in Women with Breast Cancer

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Frequently Asked Questions (FAQ)

Common questions about Colpotrophine (FAQ)


Q: How quickly do people typically notice an effect from Colpotrophine?

A: Clinical studies have examined the progression of symptoms, such as dryness and irritation, over time. These studies, which often range over several months, describe patterns of change with initial effects being described as generally noted in the initial period of observation. Continuous monitoring in the trials explores the full evolution of symptoms.


Q: Can Colpotrophine cause weight gain?

A: Official documentation for Colpotrophine primarily lists localized reactions at the application site. Since the active substance, Promestriene, is designed for minimal systemic absorption, this characteristic generally reduces the likelihood of systemic effects like those sometimes associated with oral hormonal therapy.


Q: Can I use Colpotrophine if I am taking tamoxifen?

A: Official regulatory prescribing information for Promestriene does not generally document any clinically significant systemic interactions with other medicines, including common hormonal agents. This is attributed to the medicine’s design for minimal systemic absorption. The only formal restriction is against the simultaneous use of other local vaginal products.


Q: Does Colpotrophine require a cooling or refrigeration for storage?

A: According to official product information, Colpotrophine must be stored at room temperature, as defined by the manufacturer’s label. The product must be protected from freezing to maintain the integrity of its formulation, and it is not listed as requiring refrigeration.


Q: Does Colpotrophine help with urinary symptoms, such as urgency?

A: Research has focused on the effectiveness of the medicine for the symptoms associated with the Genitourinary Syndrome of Menopause (GSM), which is the underlying condition. While urinary symptoms like urgency are often part of GSM, the documented research evidence primarily emphasizes the positive changes observed in vulvovaginal symptoms, such as dryness, burning, and pain during intercourse.


Q: Does Colpotrophine interact with common pain relievers like ibuprofen?

A: Official labeling for Colpotrophine does not document clinically significant systemic interactions with other medicines, including common over-the-counter pain relievers. This is due to the drug’s pharmacological characteristic of minimal absorption into the bloodstream when applied locally.


Q: Is Colpotrophine safe to use if I have a history of blood clots?

A: Regulatory documents advise caution for patients with pre-existing high-risk factors for blood clots (venous or arterial thromboembolic disease). The official guidance emphasizes that caution is advised in these specific situations.


Q: Why do some people experience spotting after starting Colpotrophine?

A: Vaginal bleeding, which can include spotting, is listed in official documentation as an adverse reaction that has been reported post-marketing. Official documents note that any undiagnosed or unexpected vaginal bleeding is considered a contraindication and requires professional investigation.


Q: Can Colpotrophine be used for dryness not caused by menopause?

A: Official documentation defines the use of Colpotrophine exclusively for conditions linked to estrogen deficiency in the vulvovaginal area, such as those arising during the menopausal transition. The labeled indication focuses specifically on the needs of the postmenopausal target population.


Q: Is there a limit to how long someone can use Colpotrophine?

A: While official prescribing principles for localized estrogen therapy do not specify a fixed time limit, they document that the necessity for continued treatment beyond the initial course is subject to periodic re-evaluation by a healthcare professional.


Q: Can Colpotrophine be used while breastfeeding?

A: The medicine is explicitly not recommended for women who are breastfeeding. This is due to insufficient data being available to confirm the safety of the medicine in this specific physiological state, according to regulatory documents.


Q: What is the difference between Colpotrophine and other vaginal estrogen creams?

A: Colpotrophine's active ingredient is Promestriene, which is a synthetic derivative of estradiol. Its chemical structure is specifically engineered as a diether to prevent its conversion into estradiol within the body, a design intended to result in minimal systemic absorption compared to systemically active estrogens.


Q: Can men use Colpotrophine for any purpose?

A: Official regulatory documents describe the medicine as approved exclusively for use in postmenopausal women. The indications for use are specifically defined for addressing conditions related to vulvovaginal estrogen deficiency, and it is not indicated for the male population.


Q: Are there any dietary restrictions while using Colpotrophine?

A: Official regulatory documents do not document any formal interactions or restrictions associated with food, alcohol, or supplements while using Colpotrophine.


Q: Is the active ingredient in Colpotrophine the same as in other hormone therapies?

A: The active substance, Promestriene, is classified as a synthetic estrogen analog and a derived estradiol diether. While chemically related to estradiol, its unique chemical structure makes it distinct from the estradiol or conjugated estrogens used in other, typically systemic, hormone therapies.


Q: How does Colpotrophine compare to non-hormonal lubricants for dryness?

A: Colpotrophine is classified as a hormonal agent with a trophic action, meaning it works locally to help stimulate the structural health and maintenance of the vulvovaginal tissues. Non-hormonal lubricants typically function differently by providing only temporary moisture and lubrication without altering the underlying tissue structure.


Q: Is it possible to be allergic to Colpotrophine?

A: Yes, official documents list a known hypersensitivity to the active substance (Promestriene) or any of the inactive ingredients (excipients) as a strict contraindication. This means the medicine must not be used by individuals with a confirmed allergy.


Q: Have there been studies on using Colpotrophine in younger women who have had an oophorectomy?

A: While the primary indication is for postmenopausal women, research has explored the use of the medicine in specific populations requiring localized support. These groups include breast cancer survivors, who may encompass younger women who have undergone surgery affecting ovarian function.


Q: Does Colpotrophine cause changes to menstruation?

A: Official documents describe the medicine as approved exclusively for use in postmenopausal women. However, vaginal bleeding (including spotting) is listed as an adverse reaction, which, if undiagnosed, is considered a contraindication.


Q: Is Colpotrophine absorbed into the bloodstream significantly?

A: Official documents indicate that the formulation is specifically designed for local application and is associated with negligible systemic absorption. This design characteristic is intended to limit the potential for side effects associated with hormones circulating widely throughout the body.


Q: Does Colpotrophine interact with thyroid medications?

A: Official regulatory prescribing information generally does not document any clinically significant systemic drug-drug interactions, including with medications for conditions like high blood pressure or thyroid disorders. This is due to the drug’s design for minimal systemic absorption.


Q: Can Colpotrophine be used alongside herbal supplements for menopause?

A: Official regulatory documents do not document any formal interactions or restrictions between Colpotrophine and herbal supplements, but the only formal interaction restriction is related to the simultaneous use of other local vaginal products.


Q: Is Colpotrophine available as a tablet or only as a cream/pessary?

A: According to official regulatory sources, the medicine is available in two forms designed for local application: a vaginal capsule (often called a pessary) and a vaginal cream. It is not currently approved for use as an oral tablet.


Q: Is Colpotrophine used to treat pain during intercourse?

A: Research has examined how symptoms associated with estrogen deficiency, such as pain during intercourse (dyspareunia), are managed during the study periods. The drug is indicated for vulvovaginal atrophy, which is a common cause of this type of discomfort.


Q: Can Colpotrophine be used if a woman is trying to conceive?

A: The medicine is officially approved for use exclusively in postmenopausal women. It is also explicitly not recommended for women who are or may become pregnant due to insufficient safety data to support its use in these populations.


Q: Does Colpotrophine interact with medications for high blood pressure?

A: Official regulatory prescribing information generally does not document any clinically significant systemic drug-drug interactions, which includes medications for conditions like high blood pressure. This is a characteristic attributed to the drug’s minimal systemic absorption.


Q: Does the use of Colpotrophine affect contraception?

A: The only formal interaction restriction is associated with the local route of administration. The simultaneous use of other local vaginal products, including vaginal contraceptives or spermicides, is restricted to avoid potential physical interference with either product.

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How should Colpotrophine be stored and disposed of?

Storage and Handling Requirements

The storage of Colpotrophine (Promestriene) must strictly follow the conditions defined by regulatory labeling to maintain product stability. The medicine should be stored at room temperature and kept from freezing, as low temperatures may compromise the formulation.

  • Store the product in its original package with the container tightly closed.
  • The medicine must be secured in a dry place, protected from direct light and excessive heat.
  • Always keep the product out of the sight and reach of children.

Official Disposal Instructions

Disposal of unused or expired Colpotrophine must adhere to strict environmental protection rules. Regulatory instructions state that the medicine must not be flushed down the toilet or placed into household waste.

  • Dispose of any unused or expired product according to local regulations.
  • Consult a pharmacist or healthcare professional for guidance on returning unused medicine.

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

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