Ninazol

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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 Ninazol

Understanding Ninazol

Ninazol is a pharmaceutical formulation containing ketoconazole, a synthetic antifungal agent belonging to the imidazole class. It is primarily used to treat various fungal infections by inhibiting the growth of fungi that affect the skin, hair, and mucous membranes.

Mechanism of Action

The active ingredient works by interfering with the fungal synthesis of ergosterol, a vital component of fungal cell membranes. By disrupting the integrity of these membranes, the medication inhibits the ability of the fungi to replicate and spread, effectively managing the infection at its source.

Therapeutic Applications

Ninazol is typically utilized for the management of systemic and localized fungal conditions. Common applications include:

  • Dermatological Infections: Treatment of skin conditions such as ringworm (tinea corporis), athlete's foot (tinea pedis), and jock itch (tinea cruris).
  • Yeast-Related Conditions: Management of cutaneous candidiasis and pityriasis versicolor, a condition that causes small patches of skin discoloration.
  • Scalp Conditions: Addressing seborrheic dermatitis and dandruff caused by Malassezia yeast.

Available Forms

Ninazol is produced in several formulations to suit specific clinical needs, including oral tablets for systemic treatment and topical preparations such as creams and shampoos for localized application. The choice of formulation depends on the type, location, and severity of the fungal infection being treated.

Regulatory References

  1. Ketoconazole - StatPearls - NCBI Bookshelf (NIH)
  2. Ketoconazole-containing medicines - Referral (EMA)

What side effects are possible with Ninazol?

Possible Side Effects and Safety Information

The safety profile for Ninazol (Ketoconazole), as defined by governmental regulatory authorities, is structured around the incidence of adverse effects and formal restrictions on its use. The documented risks vary significantly depending on the route of administration, with topical forms primarily exhibiting localized reactions.

Adverse Reactions and Frequency Classification

The majority of documented adverse reactions for the topical form occur at the site of application. These are classified according to regulatory frequency standards:

  • Common (may affect up to 1 in 10 people): Application site pruritus (itching), skin burning sensation, and application site erythema (redness).
  • Uncommon: Bullous eruption, contact dermatitis, rash, skin exfoliation, sticky skin, and various localized application site reactions (e.g., discomfort, irritation).
  • Frequency Not Known: Alopecia (hair loss), urticaria (hives), and angioedema (swelling beneath the skin).

Serious Systemic Safety Considerations

The regulatory label for the active substance, Ketoconazole, contains mandatory high-level warnings regarding potentially severe systemic risks, primarily when used orally:

System-Organ Class Serious Risk Documented
Hepatobiliary Disorders Severe Hepatotoxicity (liver damage) and liver failure.
Cardiac Disorders Risk of QTc prolongation and serious Ventricular Arrhythmias.

Serious allergic-type reactions, including anaphylaxis, are also documented under Immune System Disorders.


Population-Specific Safety Notes

Official regulatory documents include safety constraints for specific populations:

  • Pediatric Use: Safety and effectiveness for topical formulations are not established in pediatric patients.
  • Pregnancy: The medication is generally assigned a Pregnancy Category C, requiring careful assessment of potential risk.
  • Hepatic Impairment: The oral form of the active substance is strictly contraindicated in patients with acute or chronic liver disease.

Overdose and Emergency Response

Overdose Map: Overdose and when to seek help — official regulatory information for Ninazol

Overdose Scope

Property Description (Strictly Regulatory-Derived)
Documented overdose presentations Acute liver injury (hepatocellular/cholestatic), Adrenal insufficiency, Nausea, Vomiting, Diarrhea, Anorexia, Fatigue, Jaundice. Local redness/swelling/burning sensation (topical) [NIH, FDA].
Physiological systems affected (as stated in label) Hepatic system, Endocrine system (adrenal axis), Cardiovascular system (risk of QT prolongation/dysrhythmias) [FDA, EMA].
Dose-related or exposure-related factors (if applicable) Systemic exposure (e.g., accidental ingestion); excessive topical application [FDA].
Population-specific overdose notes (if applicable) No explicit, distinct population-specific overdose severity or response protocols documented in the general overdose sections reviewed.
Emergency-response statements (as written in official documents) Seek immediate medical attention. Contact emergency services if collapse, seizure, trouble breathing, or inability to awaken occurs. Discontinuation of use (for topical overdose). Symptomatic and supportive treatment is required [NIH, FDA].
When immediate medical help is required (label-derived phrasing only) Upon accidental ingestion. If severe, systemic symptoms (e.g., jaundice, irregular heart rhythm) manifest. If life-threatening irregular heart rhythm is suspected [FDA, NIH].

Overdose Classifications (High-Level)

Classification Regulatory Status
Severity classification (as defined in official documents) Risks include manifestations classified as severe or life-threatening (e.g., acute liver failure, Torsades de pointes) [FDA].
Regulatory basis (EMA / FDA / etc.) Information derived from FDA Prescribing Information, NIH DailyMed, EMA Summary of Product Characteristics, and national regulatory authority documents.
Overdose-context constraints (as defined in official documents) No specific antidote is known. Gastric lavage is discouraged for accidental ingestion of liquid topical formulations due to aspiration risk [FDA].

Resulting Overdose Structure

Official overdose statements:

  • Overdose may present with signs of acute liver injury (jaundice, anorexia, fatigue) and symptoms related to adrenal suppression (vomiting, hypotension) [NIH, EMA].
  • Systemic exposure carries a risk of severe cardiotoxicity, including QT prolongation which can lead to life-threatening ventricular dysrhythmias [FDA].
  • Immediate medical attention is required upon accidental ingestion or if severe, systemic symptoms manifest; treatment is limited to symptomatic and supportive measures [NIH].

Connection to the overall overdose profile

Regulatory documents define the overdose profile by strictly detailing the clinical and physiological manifestations that pose the greatest risk, thereby establishing the urgent need for medical intervention. The conditions for seeking help are precisely dictated by the label, requiring contact with emergency services for specific acute signs and specifying that management is confined to supportive measures due to the documented absence of a specific pharmacological antidote.

Therapeutic Uses of Ninazol

What Ninazol treats: main uses and benefits

Ninazol is a pharmaceutical formulation containing ketoconazole, an antifungal agent belonging to the imidazole class. It is primarily utilized to manage a variety of fungal and yeast infections that affect the skin, hair, and certain systemic functions.

Management of Fungal Skin Infections

The medication is frequently prescribed for localized fungal infections where the overgrowth of dermatophytes or yeasts has occurred. Common conditions treated include:

  • Tinea corporis (Ringworm): Fungal infections characterized by red, circular skin rashes.
  • Tinea cruris (Jock itch): Fungal growth in the groin or inner thigh area.
  • Tinea pedis (Athlete’s foot): Infections affecting the skin between the toes and on the feet.
  • Tinea versicolor: A condition caused by yeast that results in small, discolored patches of skin.

Treatment of Scalp and Hair Conditions

Ninazol is effective in addressing conditions related to the scalp, particularly those caused by the yeast-like fungus Malassezia.

  • Seborrheic Dermatitis: It helps reduce the inflammation, scaling, and redness associated with this condition on the scalp and face.
  • Dandruff: By targeting the underlying fungal growth, it assists in controlling the shedding of dead skin cells from the scalp.

Cutaneous Candidiasis

The medication is used to treat skin infections caused by Candida species. These infections typically occur in warm, moist areas of the body, such as skin folds, where the yeast can proliferate, leading to irritation and redness.

Systemic Fungal Infections

In specific clinical scenarios, oral forms of the medication may be used to treat more severe, systemic fungal infections. This includes chronic mucocutaneous candidiasis and other internal infections where alternative therapies are not suitable or have proven ineffective. The primary benefit in these cases is the inhibition of ergosterol synthesis, a vital component of fungal cell membranes, which halts the progression of the infection.

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

The eligibility to use Ninazol (Ketoconazole) is strictly defined by regulatory documents, with a critical distinction made between the minimally absorbed topical forms and the high-risk Oral Tablet form.

Contraindications and Restrictions

All forms of Ninazol are contraindicated in individuals with a known hypersensitivity to ketoconazole or any excipients in the specific formulation. Topical forms (creams, shampoos) are restricted as they are strictly not for ophthalmic use.

For the Oral Tablet form, use is severely restricted and contraindicated in multiple populations due to the risk of serious adverse effects. The tablet is explicitly contraindicated in patients with acute or chronic liver disease, certain pre-existing cardiac conditions (such as QTc prolongation), and with co-administration of an extensive list of other medications.

Age and Physiological Eligibility

Safety and effectiveness of the topical forms have generally not been established in children (pediatric patients) by regulatory authorities. For pregnant individuals, the Oral Tablet is contraindicated in some regions, whereas topical use is conditional, based on benefit justifying the potential minimal risk.

Eligibility Criterion Topical Forms (Cream/Shampoo) Oral Tablet Form
Liver Disease Generally permitted ABSOLUTELY CONTRAINDICATED
Use in Children Safety not established Restricted/Not Recommended

What should I know about interactions with other medicines?

Ninazol (Ketoconazole) is a potent inhibitor of the enzyme Cytochrome P450 3A4 (CYP3A4), a key system in the liver responsible for metabolizing many drugs. Consequently, taking Ninazol can significantly increase the blood concentration of medications cleared by this enzyme, raising the risk of serious side effects.

Contraindicated (Do Not Use Together)

Drug Class Examples of Interacting Drugs
QT-prolonging Drugs Dofetilide, Quinidine, Pimozide, Dronedarone, Cisapride, Methadone, Ranolazine, Disopyramide
Certain Statins Lovastatin, Simvastatin (risk of muscle toxicity)
Ergot Alkaloids Ergotamine, Dihydroergotamine (risk of severe vasoconstriction)
Certain Sedatives Oral Midazolam, Triazolam (risk of prolonged sedation/respiratory depression)

Other Significant Interactions

  • Acid-Reducing Agents: Drugs that decrease stomach acid (e.g., antacids, H2-blockers, proton pump inhibitors like Omeprazole) may decrease the absorption of Ninazol, rendering it less effective. An alternative antifungal agent may be necessary.
  • Warfarin and other Anticoagulants: Increased risk of bleeding due to Ninazol elevating their blood levels.
  • Rifampicin and Phenytoin: These drugs are strong CYP3A4 inducers and can decrease Ninazol's effectiveness by rapidly breaking it down.
  • Alcohol: Consumption of alcohol while taking Ninazol may increase the risk of liver damage and cause an unpleasant reaction (flushing, nausea, headache).

Mechanism of Action

How Ninazol Works: Pharmacodynamic Mechanism

The core mechanism of Ninazol (Ketoconazole) is the specific inhibition of the fungal enzyme Lanosterol 14alpha-demethylase (CYP51A1). This interaction blocks a necessary step in the production of ergosterol, the primary sterol of the fungal cell membrane. The physiological consequence is a failure to maintain membrane integrity, which hinders fungal cell growth and replication.

This molecular action initiates a cascade: the depletion of ergosterol is coupled with the toxic buildup of methylated sterol precursors within the fungal cell. This structural failure increases membrane permeability, causing the leakage of vital internal components and inhibiting the function of membrane-bound enzymes. The cellular failure results in the cessation of fungal proliferation, which culminates in cellular failure.

At high systemic concentrations, a secondary mechanism involves the potential cross-reactivity of Ketoconazole with certain human cytochrome P450 enzymes (e.g., 17alpha-hydroxylase) that regulate the steroidogenesis pathway. This mechanistic domain can lead to the physiological effect of reduced synthesis of endogenous hormones, such as cortisol and testosterone, an effect separate from the primary mechanistic focus on CYP51A1 inhibition.

Dosage and Administration Information

How to Use Ninazol (Ketoconazole)

The administration of Ninazol, which contains the active ingredient Ketoconazole, is determined by its dosage form, requiring distinct patterns for oral systemic use versus topical external use.

Administration Scope

The medicine is administered via the Oral route using the 200 mg tablet and the Topical route via 2% cream, shampoo, gel, or foam formulations. Oral dosing for systemic fungal infections typically begins at 200 mg once a day and may be increased to 400 mg once a day if necessary. The usual duration of oral therapy is approximately six months.

Entity Administration Rules
Timing in Relation to Meals Oral Tablets must be taken with a meal to ensure proper drug absorption.
Topical Frequency 2% cream is typically applied once or twice daily. 2% shampoo for seborrheic dermatitis is typically applied twice weekly for four weeks, followed by intermittent use.
Pediatric Dosing Rule For the oral tablet, children aged 2 years and older receive a weight-based dose of 3.3 to 6.6 mg/kg once daily.
Topical Preparation 2% shampoo must be applied, lathered, and allowed to remain on the affected area for 3 to 5 minutes before rinsing with water.
Missed Dose If a dose of the oral tablet is missed, it should be taken as soon as it is remembered unless it is almost time for the next scheduled dose, in which case the missed dose should be skipped.

Connection to the Overall Use Protocol

The protocol is divided by the route of administration, with oral use requiring simultaneous food intake as a condition for use to optimize drug bioavailability. Conversely, topical forms are governed by a contact time requirement, such as the three-to-five-minute application of the shampoo, which establishes the procedural requirement for its correct application.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Ninazol (Ketoconazole)

Evidence for use in Seborrheic Dermatitis

This section summarizes the structure of the clinical evaluation for seborrheic dermatitis, primarily detailing the use of randomized controlled trials (RCTs) and systematic reviews to study changes in mycological status and visible symptoms like scaling and itching.

Research was studied for Ninazol's role in individuals with seborrheic dermatitis (which includes common flaking and itching on the scalp). These studies often take the form of short-term, double-blind randomized controlled trials (RCTs) and systematic reviews. In these trials, researchers examined various outcomes, including the change in the mycological status (presence of Malassezia species) and the measurement of clinical changes, such as scores for scaling, redness, and patient-reported itching. Studies primarily included adults and adolescents (18 and older) diagnosed with mild-to-moderate forms of the condition.

Evidence for use in Tinea Versicolor

This block will describe the types of short-term studies, including comparative trials, that have focused on this superficial fungal infection, outlining how researchers measured both the mycological status and the evolution of skin lesions.

For the skin condition Tinea versicolor (Pityriasis versicolor), research has been conducted through short-term RCTs, including those comparing formulations or against other topical treatments. Studies monitored outcomes related to mycological status (change confirmed by tests like a KOH smear) and clinical status (an investigator’s assessment of skin lesions and scaling). The populations evaluated were primarily adults with mycologically confirmed, uncomplicated infections.

Evidence for use in Tinea Pedis, Tinea Cruris, and Tinea Corporis

This part will cover the body of evidence—often based on short-term RCTs and comparative studies—that has evaluated the medicine for common ringworm and athlete's foot, detailing how various clinical and mycological outcomes were assessed during the trials.

Research was studied for Tinea pedis (athlete's foot), Tinea cruris (jock itch), and Tinea corporis (ringworm). Studies in this area include double-blind, randomized, placebo-controlled multicenter trials and systematic reviews, primarily focusing on adults with uncomplicated infections. The research explored short-term symptom changes, focusing on mycological status (change in the fungus) and clinical status (outcomes related to physical discomfort like itching and scaling).

Long-term Studies and Durability of Outcomes

Across all indications, research highlights that evidence primarily derives from studies exploring short-term symptom changes, with observation periods typically lasting only a few weeks beyond the completion of treatment. This means that while studies provide context for short-term changes, there is limited information for long-term outcomes, particularly concerning the natural cycles of stability and flare-ups seen in conditions like seborrheic dermatitis and tinea versicolor. The recurrence rate of superficial fungal infections is an area of study that requires further long-term investigation.

What is Still Uncertain About the Research for Ninazol

Findings were sometimes mixed in direct comparative trials against other topical antifungal agents, and certainty remains low regarding the patterns related to the timing of reported outcomes between various compounds. Furthermore, long-term effects are not fully established across the indications, as follow-up durations were limited in most of the main efficacy trials. Data for specific patient groups, like those with complex or treatment-resistant infections, remain insufficient.

Key Studies & References

  1. Topical Antifungals for the Treatment of Superficial Dermatophyte Infections: A Systematic Review and Meta-Analysis

Frequently Asked Questions (FAQ)

Common questions about Ninazol (FAQ)


Q: What are the main things Ninazol is used for?

According to regulatory documents, the oral form of the active ingredient in Ninazol is reserved for treating specific serious systemic fungal infections when other options are not suitable. The topical formulations, such as the cream and shampoo, are approved for controlling common skin and scalp conditions caused by fungus, including seborrheic dermatitis, tinea versicolor, and ringworm infections.


Q: Does Ninazol cause tiredness or fatigue?

Official product information states that fatigue has sometimes been reported as a non-serious side effect during clinical studies. However, unusual weakness or extreme tiredness can be a symptom of a more serious issue, such as liver problems or adrenal insufficiency, which are risks associated with the oral tablet form.


Q: Does Ninazol affect sleep patterns?

The official prescribing information notes that somnolence, or feeling drowsy, has been reported with the use of the oral tablet. However, for some topical forms, any effect on cognitive function is generally described as 'not relevant' in the product labeling.


Q: Is it normal to feel a bit nauseous when starting Ninazol?

Nausea is listed as a common side effect for the oral tablet form of the medicine. Nausea is one of the commonly reported effects when taking this medicine; however, official safety information indicates that severe or persistent nausea and vomiting can also be symptoms of serious liver injury.


Q: Can elderly patients generally use Ninazol?

Official product labels often indicate that there is limited specific information available on how the effects of the medicine relate to geriatric patients (the elderly). Due to the lack of dedicated data in this population, the need for caution and individual evaluation is a regulatory consideration for use in this group.


Q: Are there any known interactions between Ninazol and common pain relievers?

The active ingredient in Ninazol strongly affects an enzyme in the liver called CYP3A4, which is described as breaking down many other medications. If certain pain relievers are cleared by this enzyme, taking Ninazol may lead to increased levels in the blood, which carries a risk of heightened side effects. Regulatory documents describe the importance of reviewing all co-administered products for potential interactions.


Q: Does Ninazol interact with birth control pills?

Official prescribing information indicates that the active ingredient in Ninazol can interact with certain hormonal contraceptives. This interaction is described as altering the blood levels of the contraceptive, which may sometimes lead to symptoms such as nausea or unexpected vaginal bleeding.


Q: How does the body generally process or eliminate Ninazol?

Pharmacokinetic studies indicate that the oral form of the medicine is mainly metabolized, or broken down, by the liver through a specific enzyme system. The drug and its byproducts are then primarily eliminated from the body through bile and excreted in the feces, with a smaller portion excreted in the urine.


Q: Are headaches a common side effect of Ninazol?

Official adverse reaction reports list headaches as a common side effect associated with the oral tablet form of the drug. However, it is also noted that a severe headache can potentially be a symptom linked to other, more serious side effects.


Q: Is there a generic version of Ninazol available?

The active ingredient in Ninazol is Ketoconazole, which is an established International Nonproprietary Name (INN). Because the drug is defined by its active ingredient, generic formulations of Ketoconazole are widely available across most markets and regions.


Q: What happens if you stop taking Ninazol suddenly?

Official documents for the topical shampoo formulation contain the recommendation to gradually withdraw any co-administered topical corticosteroid treatments to mitigate the potential for a rebound of the skin condition. The general protocol for the sudden cessation of the oral tablet is not explicitly covered in terms of specific withdrawal effects in the available regulatory text.


Q: Can people with kidney problems generally take Ninazol?

Unlike liver disease, which is a major contraindication for the oral form, kidney problems (renal dysfunction) are not listed as a primary restriction in the official prescribing information. The drug is primarily processed by the liver. However, the regulatory label contains a precaution regarding fluid retention risks in certain situations.


Q: How long does Ninazol stay in your system after the last dose?

The time required for the oral drug to be eliminated from the bloodstream is described in two phases: initially around 2 hours, and then around 8 hours thereafter. Official pharmacokinetic data indicates that the active substance generally requires a period equivalent to approximately five 'half-lives' to be fully cleared from the body.


Q: What does 'contraindicated' mean in relation to Ninazol?

The term 'contraindicated' describes conditions where the medication is not permitted for use because the risks are considered to outweigh any possible benefit, and the use could result in severe harm. For the oral tablet form of Ninazol, major contraindications involve specific conditions such as liver disease and co-administration with certain medications that carry a risk of dangerous heart rhythm problems.


Q: Can you drive or operate machinery while taking Ninazol?

Official product information states that side effects associated with the oral tablet, such as dizziness or somnolence (drowsiness), may affect a person’s ability to drive or operate machinery. However, for some topical formulations, this specific warning is generally considered not relevant.


Q: Is it normal for Ninazol to cause dry mouth?

Dry mouth is noted in regulatory adverse reaction lists for the oral tablet form, though it is not typically categorized as a common side effect. It is also mentioned that dry mouth can be a symptom related to adrenal insufficiency, which is a serious but rare systemic risk.


Q: Are there any known interactions between Ninazol and herbal supplements?

Official prescribing documents highlight that the active ingredient in Ninazol strongly affects the CYP3A4 enzyme system. Because many herbal supplements are processed by this same system, there is a potential for interaction. Regulatory information describes the importance of reviewing all co-administered products.


Q: Why is the research evidence for Ninazol important?

The official research evidence establishes the conditions for which Ninazol has demonstrated safety and effectiveness, defining its approved use. For instance, the serious risks documented in studies of the oral tablet require regulatory bodies to restrict its use to a second-line therapy, meaning it is only considered when other treatments are inappropriate.


Q: What are the general rules for stopping Ninazol?

According to official safety information, the decision to discontinue the oral tablet is guided by clinical and laboratory data. The regulatory label describes situations where treatment discontinuation is necessary, such as the appearance of specific signs of liver injury (e.g., blood test results or physical symptoms like a lack of appetite or jaundice).


Q: What kind of patient monitoring is typically associated with Ninazol use?

Due to the risks associated with the oral tablet, regulatory documents describe that liver function monitoring with blood tests is required before starting treatment and routinely throughout the course. The documents also describe that heart activity monitoring, such as an ECG, may be necessary in situations involving specific drug combinations that affect heart rhythm.


Q: Does Ninazol cause weight gain or loss?

Weight loss and reduced appetite are symptoms documented in official safety information as being linked to adrenal insufficiency, a rare but serious side effect of the oral tablet. Weight gain is not commonly listed as a direct side effect in the regulatory documents.


Q: Is it necessary to avoid sunlight while taking Ninazol?

Official adverse event reports indicate that photosensitivity, or increased sensitivity to sunlight, has been reported with the oral tablet form of the medicine. However, specific regulatory tests for the topical shampoo formulation have generally confirmed no phototoxicity potential.


Q: Can I take Ninazol if I have high blood pressure?

While the oral tablet is strictly contraindicated for certain heart rhythm problems, high blood pressure itself is not listed as a primary contraindication. However, regulatory warnings include a precaution regarding fluid retention risks when co-administering certain drugs, and high blood pressure has sometimes been reported as a less common side effect.

How should Ninazol be stored and disposed of?

How to Store and Dispose of Ninazol (Ketoconazole)

Official regulatory guidelines mandate specific storage and disposal rules for Ninazol, depending on the formulation, to ensure product stability and safety. The tablets must be stored at Controlled Room Temperature (between 15°C and 30°C) in a tight, light-resistant container, and protected from moisture.

Topical products, such as the cream and shampoo, are typically stored at 25°C. The shampoo must also be protected from light. Special handling applies to the foam and gel due to flammability; they must be kept away from fire or flame, and the foam container should not be stored above 49°C or incinerated.

For safety, all Ninazol products must be kept out of the sight and reach of children.

Disposal requires adherence to local drug regulations, often through a take-back program. The medication should not be flushed down the toilet or poured down a drain.

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

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