Ketazol

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Ketazol

Property Description
Active Ingredient Ketoconazole
Pharmacological Class Azole Antifungal / Imidazole Derivative
Forms Cream, Shampoo, Gel, Foam, and Tablet
General Purpose To halt the growth and replication of pathogenic fungi
Origin Synthetic Compound

What Type of Medicine is Ketazol?

Ketazol is defined as a specialized synthetic broad-spectrum antifungal agent, whose primary active substance is Ketoconazole. This medicine belongs to the Azole pharmacological class, a category of anti-infective drugs derived from the Imidazole chemical family. As a synthetic compound, the medicine is chemically manufactured. The general function of this single-entity product is to target the root cause of fungal proliferation.

Azole compounds serve a role as medicines for managing a wide range of fungal infections, both systemic and superficial. The compound's fungistatic properties support its role in clinical practice.

Ketoconazole: Composition and Fungistatic Function

The activity of Ketazol stems from the Ketoconazole molecule, which functions by specifically interfering with the fungal organism's structural integrity. The compound acts by inhibiting an enzyme essential for the production of ergosterol, a key lipid necessary for the stability and function of the fungal cell membrane. By preventing the organism from constructing its protective barrier, the drug exerts a fungistatic effect, stopping fungal growth and replication. This mechanism is crucial for the general purpose of providing relief by arresting the spread of the fungal organism. The final drug is prepared by integrating the active ingredient into various pharmaceutical vehicles, such as cream bases, shampoo bases, or inert tablet excipients.

Available Forms and General Route of Use

The medicine is supplied in versatile dosage forms, allowing for flexibility in its general application. High-level forms include Cream, Shampoo, Gel, and Foam designed for Topical application to the skin or scalp, as well as a Tablet for Oral ingestion. This versatility differentiates it from many topical-only antifungals. This variety in pharmaceutical presentation allows the Ketoconazole compound to be used to generally address fungal issues across multiple sites of infection, whether they are superficial or require systemic action.

Regulatory References

  1. WHO Essential Medicines List

What side effects are possible with Ketazol?

Possible side effects and safety information

The official safety profile of Ketazol (Ketoconazole) is highly dependent on its route of administration, distinguishing between localized reactions for topical forms and systemic risks for the oral tablet. Adverse reactions are systematically categorized by frequency and the affected System-Organ Class (SOC) in regulatory documents.


Frequency-Classified Adverse Reactions

Adverse reactions are formally classified based on incidence data reported in clinical studies and post-marketing surveillance, using standard regulatory frequency definitions:

Classification Common Side Effects System-Organ Class Involved
Common Nausea, Vomiting, Headache (Oral Tablet); Application site burning sensation (Topical Forms) Gastrointestinal, Nervous System, Skin
Uncommon Diarrhoea, Abdominal pain, Abnormal liver function tests, Dizziness (Oral Tablet) Gastrointestinal, Hepatobiliary, Nervous System

Serious Adverse Reactions and Restrictions

Regulatory documentation highlights serious systemic risks primarily associated with the oral formulation. These include the potential for severe Hepatotoxicity (liver injury) and serious cardiovascular risks such as QT prolongation when co-administered with certain medications. Due to these concerns, the oral tablet is contraindicated in patients with acute or chronic liver disease.


Safety Patterns and Special Populations

For topical use, application site reactions are often noted as being more frequent at the start of treatment. Regarding specific patient groups, the oral formulation has strict safety constraints for individuals with pre-existing hepatic impairment. Additionally, the safety and efficacy of the oral tablet have not been established in the pediatric population.

Overdose and Emergency Response

The official regulatory documents define the overdose profile for Ketazol (Ketoconazole) by focusing on the systemic risks inherent to overexposure and the resulting mandated emergency response.

Overdose of the oral tablet form is primarily associated with acute gastrointestinal manifestations such as nausea, vomiting, and diarrhea. The most critical documented risks, however, are systemic, including the potential for serious hepatotoxicity leading to liver failure. Systemic overexposure also carries the risk of QT interval prolongation, which may precipitate life-threatening ventricular dysrhythmias, and the potential development of adrenal insufficiency.

For the topical forms (creams, shampoos, gels), excessive application may result in localized effects, specifically erythema, oedema, and a burning sensation. Regulatory guidance explicitly states that if the topical product is accidentally ingested, neither emesis nor gastric lavage should be instigated to avoid the risk of pulmonary aspiration.

Immediate medical attention is required for any life-threatening symptoms or for the prompt recognition of signs indicative of liver injury, such as jaundice, dark urine, or unusual fatigue. Treatment is defined strictly as symptomatic and supportive care, as no specific antidote is currently documented in official regulatory labeling.

Therapeutic Uses of Ketazol

Ketazol, which contains the antifungal agent Ketoconazole, is commonly used to manage infections caused by pathogenic fungi and yeasts. Its therapeutic application focuses on addressing symptomatic discomfort and supporting the management of infection recurrence. This medicine is generally used across conditions involving localized discomfort that requires antifungal support.


The primary conditions where Ketazol is considered relevant include common fungal skin infections such as dermatophytoses (ringworm, jock itch, athlete's foot), skin yeast infections (cutaneous candidiasis), and chronic conditions like Seborrheic Dermatitis and Tinea Versicolor. It is applied in addressing symptom clusters that may become intense or disruptive, including intense itching, scaling, redness, and burning discomfort at the lesion site. Ketazol supports the easing of the overall symptom burden, which may assist with maintaining functional stability during symptomatic periods.

In specific and often serious clinical situations, the medicine is also relevant for managing symptoms associated with deep-seated systemic fungal infections (e.g., histoplasmosis). This use is in contexts where supportive therapeutic assistance is appropriate, helping to manage the spread of the pathogen.

Quick Fact: Support for Itching and Scaling Symptoms
Ketazol is generally used to address symptoms related to inflammatory or irritative states associated with fungal growth, helping to minimize the discomfort that interferes with daily functioning.

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Who Can and Cannot Use Oral Ketoconazole (Ketazol)

Oral ketoconazole (Ketazol) is a medicine with highly restricted eligibility as defined by authoritative government regulatory bodies (e.g., FDA, EMA). Use is generally limited to specific, severe conditions when other less-toxic treatments have failed or are not tolerated.


Absolute Contraindications (Must Not Use)

Population/Condition Regulatory Stance
Acute or Chronic Liver Disease Absolute Contraindication
Hypersensitivity to Ketoconazole Absolute Contraindication
Pregnancy and Breastfeeding Contraindicated / Not Recommended
Specific Co-administered Medicines Absolute Contraindication
Known QTc Prolongation Absolute Contraindication

Conditional or Restricted Use

The medicine is typically reserved for adults being treated for endogenous Cushing's syndrome or serious systemic fungal infections only as a last-resort option.

  • Pediatric Patients: Safety and effectiveness are not established in children under 12 years of age for certain indications.
  • Adrenal Function: Patients must be monitored closely for adrenal insufficiency.

Patients can only use this medicine if they meet the strict indication criteria and are free of the conditions listed above.

What should I know about interactions with other medicines?

Ketazol Interactions with other medicines and products

Ketazol (oral Ketoconazole) has a comprehensive interaction profile, documented by regulatory authorities, which restricts its co-administration with numerous medicinal products. This is primarily due to Ketazol's documented role as a potent inhibitor of the CYP3A4 enzyme and drug efflux transporters, including P-glycoprotein (P-gp).

Formal Interaction Constraints

Co-administration with many medicines metabolized by the CYP3A4 pathway is formally contraindicated as this interaction can dangerously elevate the co-administered drug's plasma concentrations. Prohibited agents include certain antiarrhythmics (e.g., dofetilide, quinidine), specific statins (e.g., lovastatin, simvastatin), and certain sedatives (e.g., oral midazolam, triazolam, alprazolam).

Interaction Type Examples of Affected Agents
Potent CYP3A4/P-gp Inhibition Dofetilide, Simvastatin, Oral Midazolam, Lurasidone
Absorption Alteration (pH-Dependent) Antacids, H2-receptor antagonists, Proton Pump Inhibitors

Condition-Based Restrictions and Timing Rules

Ketazol absorption requires gastric acidity; therefore, acid-reducing agents must be managed carefully. For example, regulatory labeling specifies that antacids containing aluminum must be taken at least one hour before or two hours after Ketazol. Furthermore, the official profile includes population-specific restrictions: the use of colchicine is contraindicated in patients with renal impairment who are taking Ketazol, and the co-administration of vardenafil is contraindicated in men older than 75 years. Alcohol consumption is also officially required to be avoided.

Mechanism of Action

Ketazol, an imidazole derivative, primarily functions as a non-competitive inhibitor targeting the lanosterol 14alpha-demethylase enzyme (CYP51A1) in fungal cells. This metalloenzyme is essential for the sterol biosynthesis pathway, specifically catalyzing the conversion of lanosterol to ergosterol.

The inhibition of lanosterol 14alpha-demethylase prevents the critical demethylation step, leading to the depletion of ergosterol within the fungal cell membrane and the concurrent accumulation of 14alpha-methylated sterol precursors. Ergosterol is required for maintaining the structural integrity, permeability, and fluidity of the fungal cell membrane.

The intracellular consequences include structural compromise of the fungal cell membrane, resulting in increased permeability, which facilitates leakage of essential cellular components. This modification of membrane dynamics disrupts membrane-bound enzyme systems.

At the system level, Ketazol also interacts with human cytochrome P450 enzymes involved in steroidogenesis, acting as an inhibitor of 17alpha-hydroxylase and 17,20-lyase. This secondary action modulates the synthesis of endogenous steroid hormones, resulting in a systemic decrease in certain steroid hormone concentrations.

Dosage and Administration Information

How to Use Ketoconazole (Ketazol) — Official Administration Guidelines

Ketoconazole is administered via two primary methods: oral ingestion for systemic treatment and topical application for skin and scalp conditions, each with distinct requirements for use.


Oral Tablet Administration (Systemic Use)

Instruction Requirement
Route of Administration Oral
Standard Adult Dosing 200 mg once daily, may be increased to 400 mg once daily.
Timing in Relation to Meals Must be taken with a meal to enhance absorption.
Acid-Reducing Agents Acid reducers (PPIs, H2-blockers, antacids) should be taken at least 2 hours after the tablet.
Age Restriction Not recommended for children under 2 years of age.

Topical Formulations (Cream, Shampoo, Foam)

Instruction Requirement
Route of Administration Topical/Dermal (External use only)
Shampoo Application Apply to the affected area, lather, leave in place for 5 minutes, and then rinse thoroughly.
Frequency Varies by condition: Cream may be applied once or twice daily; Shampoo may be used twice weekly.
Flammability Topical foam and gel are flammable; avoid heat, open flame, or smoking during application.

Official Use Protocol Structure

The approved protocol mandates following the route-specific instructions precisely. For oral use, this involves strict adherence to food intake and managing co-administered medications that affect gastric acidity. For topical applications, the protocol defines the contact time (e.g., 5 minutes for shampoo) and external use only. These guidelines structure the standardized approach to correct medicine use as outlined in official documents.

Recent Clinical Evidence

Ketazol: Recent Clinical Evidence

Evidence for Topical Use in Common Fungal and Yeast Skin Infections

Research exploring the outcomes of topical Ketazol (creams, shampoos, gels, and foams) has focused primarily on common skin conditions caused by pathogenic fungi and yeasts, such as Athlete's Foot, Ringworm (dermatophytoses), Tinea Versicolor, and Seborrheic Dermatitis. These studies were primarily structured as short-term Randomized Controlled Trials (RCTs). These trial designs were applied in studies examining outcomes related to physical discomfort and outcomes linked to inflammatory or irritative states.

Researchers monitored metrics like changes in signs (redness and scaling) and patient-reported outcomes describing perceived discomfort. Research also examined mycological clearance—a technical measure of whether the fungal organism was cleared from the affected site. Findings describe patterns observed in these short-term studies, and the evidence contributes to the broader evidence landscape for managing these episodic or acute skin conditions. Data remain insufficient regarding how the various topical forms were compared to newer antifungal agents in all populations.


Historical Evidence for Oral Use in Systemic Fungal Infections

Ketazol in its oral tablet form was studied for use in deep-seated systemic fungal infections, such as histoplasmosis. The evidence for this use is primarily derived from older clinical trials and case series. Research examined outcomes related to systemic or functional imbalance, including the ability to manage the spread of the pathogen. Research focus on the oral use of Ketazol was reduced due to concerns about internal organ health and its potential for serious drug interactions.


Study Types, Quality, and Key Limitations

Most of the available evidence on Ketazol involves short-term study designs, typically focusing on the monitored change in the status of a fungal infection or the observed change in symptoms over a 2-to-8 week period. The research base for Ketazol is diverse, consisting of Randomized Controlled Trials (RCTs), comparative studies, and systematic reviews. Evidence also points to several key limitations. Follow-up durations were limited, meaning long-term effects are not fully established. Research provides context but not individual predictions. Findings describe group patterns, not personal outcomes.

Frequently Asked Questions (FAQ)

Common questions about Ketazol (FAQ)

Q: What type of medication is Ketazol, and how does it work?

Ketazol is classified as a non-steroidal anti-inflammatory drug (NSAID). According to the official product information, it works by inhibiting the production of certain natural substances in the body that cause inflammation, pain, and fever. This mechanism is the basis for its use in reducing pain and swelling associated with various conditions, according to official labeling.

Q: What is Ketazol mainly used to treat?

Regulatory documents state that Ketazol is primarily indicated for managing mild to moderate pain, reducing fever, and treating certain types of inflammation. It is commonly used for conditions such as pain following surgery or dental procedures, menstrual pain, and symptoms of certain inflammatory diseases.

Q: Is Ketazol the same as other pain relievers like Tylenol (acetaminophen) or Advil (ibuprofen)?

Ketazol is in the same class as ibuprofen (an NSAID), but it is not the same type of medication as acetaminophen (the active ingredient in Tylenol). Official product information confirms that Ketazol is specifically an NSAID, which means it works differently than non-NSAID pain relievers.

Q: How long does it typically take for Ketazol to start working?

Official product information indicates that initial pain relief typically begins relatively quickly after administration, often within about 30 minutes. While the exact time can vary among individuals, studies and official information show this timeframe for noticing initial effects.

Q: What should I do if I miss a dose of Ketazol?

Official product information outlines a procedure for a missed dose: generally, if a dose is missed, the instruction is to take it as soon as it is recalled, unless the next dose is due shortly. The regulatory text advises skipping the missed dose and continuing with the regular schedule in that scenario, to avoid taking a double dose.

How should Ketazol be stored and disposed of?

Storage and Disposal Requirements for Ketazol (Ketoconazole)

The storage and handling of Ketoconazole, in its various forms, are governed by specific regulatory requirements to maintain product stability and ensure safety.

Scope Element Official Regulatory Requirements
Storage Temperature Store at 20 C to 25 C (68 F to 77 F) (Controlled Room Temperature) for tablets and cream. Foam must not be stored above 50 C (122 F).
Protection Requirements The medication must be protected from light and moisture. Tablets should be stored in a tightly closed container.
Child Safety All forms of the medicine must be kept out of the reach of children.
Disposal and Handling Pressurized foam containers must not be punctured or incinerated. All unused or expired product must be disposed of in accordance with local regulatory instructions.

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

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