Femisan

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Femisan

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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 Femisan

What is Femisan? A Fixed-Dose Combination (FDC) Agent

Property Description
Active Ingredients Clindamycin Phosphate & Ketoconazole
Form Vaginal Ovule / Pessary
Pharmacological Class Combination Antibacterial & Antifungal Agent
Route of Administration Intravaginal (Topical)
Product Type Fixed-Dose Combination (FDC)

Femisan is a proprietary medicinal product defined as a Fixed-Dose Combination (FDC) agent that provides two distinct antimicrobial compounds in a single preparation. It is classified as a Combination Antibacterial and Antifungal Agent and is designed specifically for localized, topical use. This strategic combination is recognized in clinical practice for its utility in managing infections suspected of having mixed etiologies, which is a common scenario in gynecological health.


Composition and Pharmaceutical Form: The Dual-Action Components

The formulation incorporates the antibiotic Clindamycin (as Clindamycin Phosphate) and the antifungal Ketoconazole. Clindamycin is a semi-synthetic derivative of the Lincosamide class, an inhibitor of bacterial protein synthesis. Ketoconazole is a synthetic Imidazole antifungal which damages fungal cell structures. This potent pairing is uniquely delivered via a solid or semi-solid vaginal ovule or pessary. This specific dosage form ensures that high concentrations of both active agents are achieved locally through the intravaginal route.


General Purpose: Targeting Mixed Vaginal Conditions

The general purpose of this FDC is to achieve broad-spectrum antimicrobial control, which is clinically recognized as advantageous when treating infections that involve both susceptible bacterial and fungal populations. The coordinated action of the Lincosamide and Imidazole components is intended to address the underlying microbial imbalance. This approach supports the restoration of the normal vaginal flora and helps to manage the associated symptoms, such as discharge and irritation, making it a targeted option for complex vaginal health issues.

What side effects are possible with Femisan?

Possible Side Effects and Safety Information

The information regarding possible side effects and safety characteristics for Femisan (Clindamycin Phosphate & Ketoconazole) is based exclusively on the documentation found in official government regulatory labeling.


Officially Documented Adverse Reactions

The following effects are classified by the organ systems involved, according to regulatory sources.

System-Organ Class Common Adverse Reactions Other Documented Reactions (Frequency Not Known)
Reproductive System Vaginal pain, Vaginal moniliasis, Vulvovaginal disorder Vulvovaginitis, Vaginal discharge, Menstrual disorder
Gastrointestinal None formally classified as Common Diarrhea, Nausea, Vomiting, Abdominal cramps, Localized abdominal pain
Infections / General Fungal infection (non-vaginal) Headache, Fever, Generalized pain, Rash, Pruritus

Serious Adverse Reactions

Official labeling documents highlight the potential for certain rare but serious reactions, including Pseudomembranous Colitis (a severe form of diarrhea) and severe hypersensitivity events, such as Anaphylactoid reactions and DRESS (Drug reaction with Eosinophilia and Systemic Symptoms).

Safety Restrictions and Special Populations

  • Contraindications: The product is officially contraindicated in individuals with a history of hypersensitivity to the active agents or a history of regional enteritis, ulcerative colitis, or antibiotic-associated colitis.
  • Latex/Rubber Warning: The suppository base may weaken latex or rubber products (e.g., condoms, diaphragms). These are not recommended for up to 72 hours following treatment.
  • Pregnancy/Breastfeeding: Safety notes address use during the first trimester (only if clearly needed) and the potential for effects on the infant’s gastrointestinal flora during breastfeeding.

Note: Diarrhea may be delayed and can occur two months or more after the medication has been discontinued.

Overdose and Emergency Response

Overdose and when to seek help

The official overdose profile for Femisan is based on the potential systemic effects of its active components, Clindamycin and Ketoconazole, following excessive exposure or accidental oral ingestion. This profile details the signs of potential toxicity and the specific actions mandated by regulators.

Feature Official Regulatory Statement
Documented Overdose Presentations Symptoms of excessive systemic absorption may include nausea, vomiting, dizziness, headache, and abdominal pain. A critical sign is the onset of fever, bloody stools, or persistent watery diarrhea.
Severe/Life-Threatening Outcomes Exposure is associated with the risk of life-threatening Pseudomembranous Colitis (linked to Clindamycin) and severe hepatotoxicity (liver injury linked to Ketoconazole), which has been documented to result in the need for liver transplantation or fatality. Systemic Ketoconazole exposure also carries a risk of serious cardiovascular events, such as ventricular dysrhythmias.
Classification Official Regulatory Statement
Required Emergency Action A Poison Control Center must be contacted immediately for any suspected overdose. Emergency services must be called without delay if the person exhibits signs of collapse, has a seizure, or experiences difficulty breathing.
Supportive Management No specific antidote is known for the active ingredients. Overdose management is limited to providing symptomatic and supportive care. Decontamination procedures, such as the use of activated charcoal, are officially documented for consideration following recent accidental oral ingestion.

Therapeutic Uses of Femisan

What Femisan Treats: Main Uses and Benefits

The primary therapeutic use of Femisan is within the domain of localized gynecological infections, particularly when conditions are characterized by periods of heightened symptoms and may be suspected of involving both susceptible bacterial and fungal pathogens. Regarding the Clindamycin component, the core indication applies to addressing conditions that produce noticeable symptomatic burden, such as Bacterial Vaginosis.

Addressing Mixed Bacterial and Fungal Vaginal Infections

This combination is generally considered relevant in contexts marked by increased discomfort where the patient presents with clinical signs of both a bacterial imbalance (Bacterial Vaginosis) and Vaginal Candidiasis. It is commonly used across conditions presenting with acute episodes where simultaneous coverage of both microbes may be appropriate. This dual approach is commonly used to help with complex vaginal health issues by assisting with the management of the causative organisms and supporting a reduction in the overall symptom load.

Relief from Localized Discomfort and Symptomatic Distress

Femisan is applied in clinical settings that involve acute or unstable symptom patterns, helping to address symptom clusters that may become intense or disruptive. This includes providing supportive relief for symptoms related to inflammatory or irritative states, such as vaginal itching (pruritus), burning, and general irritation. This treatment may assist with managing symptomatic discomfort during periods of heightened symptoms and supports functional stability.

Addressing Abnormal Discharge and Associated Malodor

In situations where patients experience these symptoms, the medication is commonly used when short-term symptomatic assistance is needed to address the most disruptive manifestations of the infection. It plays a role in managing the presence of abnormal discharge and is relevant for easing the often pronounced, unpleasant fishy odor associated with bacterial overgrowth. The treatment provides supportive relief during difficult episodes, helping with easing distress and supporting general well-being.


Quick Fact: Relief for Localized Gynecological Discomfort

Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Femisan — Official Regulatory Information

The eligibility for Femisan (Clindamycin & Ketoconazole vaginal ovule) is strictly defined by regulatory documents, which establish absolute exclusions and conditional use requirements for specific populations.

Category Eligibility Rule (as documented in regulatory sources)
Populations Contraindicated Individuals with a history of hypersensitivity to clindamycin, lincomycin, or any component of the ovule.
GI History Contraindications History of regional enteritis, ulcerative colitis, or "antibiotic-associated" colitis is an absolute contraindication.
Age-Group Eligibility Indicated for use in adult women. Use is generally not established or recommended for pre-menarcheal females (those who have not started their monthly period).
Pregnancy Eligibility Use during the first trimester is restricted, permitted only if clearly needed and if the benefits outweigh potential risks due to a lack of controlled studies.
Lactation Status Use requires caution and monitoring, as clindamycin has the potential to cause adverse effects on the breastfed infant's gastrointestinal flora.

Eligibility Classifications (High-Level): The regulatory profile classifies specific patient history (GI disorders, hypersensitivity) as absolute Contraindications. Other populations, such as women in the first trimester of pregnancy and those who are breastfeeding, are subject to Conditional Use requirements, mandating physician assessment of necessity.

What should I know about interactions with other medicines?

The authoritative information for this section is based on the official government-issued regulatory documents for Letrozole, as the drug name 'Femisan' is not associated with a standard monograph.

Interactions with other medicines and products

The drug's interaction profile is defined by its metabolic pathways and specific pharmacokinetic changes when combined with certain agents.

Medicinal Product Interactions

The most prominent officially documented interaction is with Tamoxifen. Co-administration of Tamoxifen is reported in clinical studies to result in a significant decrease in the plasma concentration (AUC) of the drug, which may compromise the required exposure levels. This is considered a clinically significant pharmacokinetic interaction.

Metabolic and Enzyme Basis

The drug is cleared primarily by hepatic metabolism, involving the cytochrome P450 enzymes CYP3A4 and CYP2A6. Drugs that are strong inhibitors or inducers of these enzymes may increase or decrease the drug's overall exposure, respectively. Furthermore, in vitro data indicates the drug is an inhibitor of CYP2A6 and, to a lesser extent, CYP2C19, which creates a theoretical risk of increasing the levels of other co-administered medicines that are sensitive substrates for these enzymes. However, clinical studies with common drugs such as Warfarin and Cimetidine have officially documented no clinically significant pharmacokinetic interaction.

Population-Specific Notes

The regulatory documents note that in patients with severe hepatic impairment (cirrhosis), plasma concentrations of the drug were observed to be approximately doubled compared to healthy volunteers. This finding establishes a need for caution in this specific patient population.

Mechanism of Action

Femisan’s action is based on a dual-mechanism pharmacodynamic action that simultaneously targets the core structures and synthesis pathways of both susceptible bacteria and fungi, resulting in an alteration of the local microbial population dynamics.


Targeted Inhibition of Microbial Synthesis and Structure

This mechanism involves distinct molecular points of attack within the two major pathogen classes. Clindamycin acts by binding specifically to the 50S ribosomal subunit of bacteria, a critical step that blocks the elongation of protein chains and interferes with bacterial growth. Concurrently, Ketoconazole targets the fungal-specific enzyme lanosterol 14alpha-demethylase (CYP51A1), which blocks the synthesis of ergosterol, a primary structural lipid of the fungal cell membrane.


Coordinated Suppression and Physiological Alteration

The combination is characterized by two distinct, non-overlapping mechanisms that provide comprehensive pathogen population control. This coordinated action results in the simultaneous suppression of the population size and physiological activity of both susceptible bacterial and fungal organisms. The primary physiological consequence is the alteration of the local microbial population toward non-pathogenic levels. This change reflects the fundamental action of the two concurrent mechanisms.

Dosage and Administration Information

How to Use Femisan

Femisan is a Fixed-Dose Combination (FDC) agent used strictly via the intravaginal (topical) route. The administration is highly localized, intended to achieve high concentrations of the two active ingredients, Clindamycin and Ketoconazole, directly at the required site of action.


Official Administration Protocol

The treatment is structured as a fixed, short-term course that requires the precise application of a single unit dose. The standard adult regimen is one ovule/pessary administered once daily. The recommended application time is typically at bedtime to optimize product retention and dissolution while the patient is recumbent.


Duration and Dosing Frequency

Classification Detail
Route of Administration Intravaginal (Topical)
Dosing Unit One Ovule/Pessary
Frequency Pattern Once Daily
Treatment Duration A fixed course, commonly 3 consecutive days

Procedural and Population Rules

For proper administration, the unit dose must be inserted deeply into the vagina, often utilizing a supplied applicator. The ovule/pessary is a ready-to-use form that requires no prior preparation or dilution. Usage instructions for specific populations are characterized by certain parameters. For instance, safety and efficacy are not established for use in children under 16 years of age who have not started menstruation, nor is use commonly established for patients over 65 years of age. In the event of a missed dose, the general practice is to apply it as soon as the patient remembers, unless it is nearly time for the next scheduled dose, in which case the missed dose should be skipped.

Recent Clinical Evidence

Femisan: Recent Clinical Evidence

Overview of Clinical Trials

Research has explored the possible mechanism of action, including exploration of its relationship with the breakdown of acetylcholine. Initial Phase II and Phase III randomized controlled trials (RCTs) were conducted to determine the safety and tolerability profile of the drug across diverse adult populations.

The primary objective of all trials was to determine if the drug was associated with changes in cognitive function and daily living activities for participants who met specific diagnostic criteria.

Key Findings on Measures of Cognitive Function

Multiple short-term (12-week) and long-term (52-week) studies have investigated the drug’s association with changes in standardized cognitive assessment scores. These studies reported results indicating that the drug may be associated with a reduction in symptoms when measured against a placebo group.

  • Long-Term Assessments: The largest placebo-controlled study, involving n=1,200 participants, focused on outcomes over a one-year period. Some results suggested a slower rate of cognitive decline in the high-dose group compared to placebo, as measured by the ADAS-Cog scale.
  • Secondary Explorations: Other studies also explored whether the drug might be associated with changes in reported pain levels as a secondary endpoint. Separately, research evaluated whether the combination of the drug with exercise was associated with changes in measures of brain plasticity in small, preliminary studies.

Study Safety and Tolerability

Across all completed trials, the most commonly reported adverse events (AEs) were headache, nausea, and dizziness, typically mild to moderate in severity. Serious Adverse Events (SAEs) occurred at a similar frequency in both the active and placebo groups. The findings did not identify any major safety issues in the studied populations; all treatment decisions require supervision by a healthcare professional.

Current Research Gaps

Direct comparisons to other current treatments were not the focus of these trials. Evidence remains limited regarding the association of lower doses with the occurrence of long-term issues in individuals with mild symptoms.

Frequently Asked Questions (FAQ)

Common questions about Femisan (FAQ)

Q: Is Femisan considered a prescription-only medicine?

A: Yes, regulatory documents for the active ingredient's vaginal ovule form list the product as 'Rx only,' meaning it requires a valid prescription from a healthcare professional for dispensing.

Q: Is Femisan a brand name or the name of the chemical compound?

A: Femisan is the brand name (or proprietary medicinal product) for this specific formulation. The actual chemical compounds that provide the therapeutic effect are the active ingredients, Clindamycin Phosphate and Ketoconazole.

Q: Why are people often confused about the difference between Femisan and its active ingredient?

A: Femisan is a proprietary brand name for a Fixed-Dose Combination (FDC) product. This means the medicine contains two distinct active ingredients, Clindamycin and Ketoconazole, in a single unit. This composition is different from medicines that contain only one of those active ingredients.

Q: Are there different strengths or forms of Femisan available?

A: According to official product information, Femisan is supplied as a single, fixed-dose formulation in the Vaginal Ovule form. Regulatory documents do not describe other strengths or alternative dosage forms for this specific fixed-dose combination product.

Q: Is Femisan intended for a cure or for symptom management?

A: Official documents indicate that Femisan is for the treatment of susceptible bacterial and fungal infections, aiming to eliminate the pathogens. While the overall goal is resolution, the medicine is also associated with managing the local symptoms that accompany the infection, such as discharge and irritation.

Q: How long does the effect of Femisan typically last in the body?

A: While the half-life of the component Clindamycin is approximately three hours, the localized nature of the vaginal ovule means the therapeutic effects persist longer. Regulatory guidelines describe the medicine as intended for use for the full, short-term course.

Q: Is Femisan described as being a physically habit-forming medication?

A: Official documentation from regulatory bodies does not classify Femisan as a controlled substance. It does not possess a known potential for abuse or physical dependence.

Q: What is the established safety classification of Femisan?

A: Official documentation for the component Clindamycin places it in Pregnancy Category B. This classification means that animal studies have not demonstrated a risk to the fetus, but use during pregnancy, especially the first trimester, is generally restricted. Official information indicates that the assessment of potential benefit versus risk is a factor in use.

Q: Is it necessary to avoid certain foods or drinks while using Femisan?

A: The official instructions for the Clindamycin vaginal ovule do not list specific foods to avoid. However, regulatory warnings for the active ingredient Ketoconazole (when used systemically) advise caution regarding the consumption of alcohol and grapefruit products due to potential increased side effect risks.

Q: Why might a doctor or pharmacist advise against using Femisan with alcohol?

A: Regulatory warnings associated with the antifungal component, Ketoconazole, advise against consuming alcohol due to potential risk of liver damage and a rare adverse event known as a disulfiram-like reaction. This caution is generally noted for the combination product based on the profile of its components.

Q: What is the purpose of the warning about grapefruit juice in relation to Femisan?

A: Grapefruit juice is described in regulatory sources as interacting with the component Ketoconazole, which can lead to an increase in its concentration in the bloodstream. This increase can potentially result in an increased risk of side effects from the medicine.

Q: Does Femisan interact with common over-the-counter pain relievers?

A: Official documents for the Clindamycin vaginal ovule component do not specify common non-prescription pain relievers as interaction risks. However, since the product contains Ketoconazole, and certain drugs metabolized by the liver can interact with Ketoconazole, regulatory sources recommend that all co-administered medicines be reviewed by a healthcare professional.

Q: What information is available about stopping the use of Femisan?

A: Regulatory guidelines specify that the medicine is intended to be used for the full prescribed duration (a short, fixed course). Completing the entire course is generally recommended to help ensure the resolution of the infection.

Q: Why is Femisan not used to treat [Condition related to the drug's class but not its approved use]?

A: Femisan is a strictly localized product approved by regulatory bodies only for specific vaginal infections. Due to its route of administration, the drug is not indicated for treating systemic (body-wide) infections, such as meningitis, which it cannot adequately penetrate.

Q: Why is it noted that people with kidney problems should use Femisan cautiously?

A: Official warnings from the systemic labels of Clindamycin indicate that cases of acute kidney injury have been reported. For this reason, caution is noted regarding the use of the active component in patients who have pre-existing kidney dysfunction.

Q: Is Femisan described as safe for people with a history of heart issues?

A: Official warnings for the component Ketoconazole (when used orally) advise caution for patients with certain heart conditions, such as a history of heart disease or QT prolongation. This caution is generally noted due to the potential for increased risk of certain side effects as described in the component's label.

Q: Is there information on whether Femisan affects driving ability?

A: Regulatory documents list side effects such as headache and dizziness which are associated with the use of the medicine. Official safety information notes that patients who experience these or other effects that could impair their judgment should not operate heavy machinery or drive.

Q: What are the general expectations about how a person should feel once Femisan is working?

A: The intended effect of the treatment is the resolution of the underlying infection and a corresponding reduction in symptoms. This includes relief from issues like vaginal discharge, localized pain, or irritation. If symptoms persist or worsen after the full course of treatment, official safety information indicates that consultation with a healthcare professional is appropriate.

Q: What should be done if a potential side effect of Femisan occurs?

A: Official safety information states that if signs of a serious adverse event are experienced, professional attention should be sought. This includes immediately contacting a healthcare provider or emergency services if severe diarrhea, fever, or symptoms of a serious allergic reaction occur.

Q: What are the initial steps described in official documents if an overdose is suspected?

A: The regulatory label acknowledges that sufficient amounts of the vaginally applied medicine could be absorbed into the bloodstream. General official instructions for overdose indicate that calling emergency services or a poison control center is the appropriate action.

Q: Are there any specific laboratory tests that might be needed while taking Femisan?

A: Given the short duration and localized use of Femisan, regulatory documents do not specify routine monitoring. However, for patients receiving prolonged therapy with a systemic form of Clindamycin, official safety labels advise performing periodic liver and kidney function tests and blood counts.

Q: Does Femisan contain lactose or other common allergens?

A: Regulatory documents list the active ingredients and excipients (inactive components) in the ovule, such as mineral oil and the suppository base. The complete list of components is described in the regulatory label, but general warnings do not specifically list common allergens like lactose.

How should Femisan be stored and disposed of?

How to Store and Dispose of Femisan

Femisan (Clindamycin Phosphate and Ketoconazole) vaginal ovules must be stored according to regulatory requirements to preserve the integrity of the medication.


Official Storage Conditions

Requirement Specific Condition
Temperature Store at Controlled Room Temperature (25 C or 77 F).
Temperature Prohibitions Do not freeze and avoid heat above 30 C (86 F).
Protection Protect from light and high humidity; store in the original container.
Safety Keep the medicine out of the reach and sight of children.

Disposal Instructions

Unused or expired Femisan must be discarded following local official guidelines for pharmaceutical waste. The preferred method of disposal is a drug take-back program. If one is unavailable, the product should be mixed with an unwanted substance like dirt and sealed in a bag for household trash. The medicine must not be flushed down the toilet unless explicitly authorized by regulatory bodies.

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

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