Ketomac

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Ketomac

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Medically reviewed

Rosario Oropesa

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 Ketomac

Quick Facts

Property Description
Active Ingredient Ketoconazole
Form Topical Cream, Shampoo, Gel, Foam
Pharmacological Class Azole Antifungal / Imidazole Derivative
Common Purpose Addressing superficial fungal and yeast infections
Origin Synthetic Compound

Defining Ketomac: The Azole Antifungal Identity

Ketomac is a trade name for a medicinal product containing Ketoconazole Topical, a synthetic compound classified pharmacologically as an azole antifungal agent. This specialized medicine belongs to the Imidazole derivative group, a class of drugs engineered to specifically combat infections caused by fungi and yeasts on the body's surface. Ketoconazole is recognized for its efficacy in targeting these superficial pathogens.

The fundamental purpose of this agent is the management of fungal presence on the skin and scalp. As a synthetic single-ingredient product, its activity is considered broad-spectrum against a variety of dermatophytes and yeasts. This formulation is frequently chosen to address common concerns such as persistent flaking of the scalp caused by yeast overgrowth.

Forms and Composition: Understanding Topical Ketoconazole

The active ingredient is Ketoconazole, which is formulated exclusively for topical application (external use) in several common dosage form(s), including a moisturizing cream, a cleansing shampoo, a smooth gel, and a light foam. This variety ensures the medicine can be applied appropriately across different affected areas, from localized skin patches to the entire scalp. The drug is always combined with an inert base/vehicle (such as an aqueous cream base or a shampoo suspension), to ensure the Ketoconazole can be efficiently delivered to the infection site. This Topical route of administration is defined as the application of a drug to a body surface to treat a localized condition.

General Purpose: How Ketoconazole Works Against Fungi

Ketoconazole Topical functions primarily as an Ergosterol Synthesis Inhibitor to prevent the growth and spread of fungal pathogens. It achieves this by blocking a specific fungal enzyme, which is essential for manufacturing ergosterol, the vital structural component of the fungal cell membrane. This class of azole antifungals acts by inhibiting fungal cell membrane synthesis. This mechanism is crucial for the control and elimination of superficial fungal presence on the skin and scalp.

Regulatory References

  1. NIH MedlinePlus on Ketoconazole Topical

What side effects are possible with Ketomac?

Possible Side Effects and Safety Information

The safety profile for topical ketoconazole (Ketomac) primarily details local adverse reactions affecting the skin and application site, as documented in official government regulatory sources. Due to minimal systemic absorption, the high-level systemic safety concerns associated with oral ketoconazole are not applicable to the topical formulation.


Frequency-Classified Adverse Reactions

Adverse reactions are grouped by frequency classification:

  • Common (may affect up to 1 in 10 people): Reactions are mainly localized, including pruritus (itching) at the application site, a skin burning sensation, and localized erythema (redness).
  • Uncommon (may affect up to 1 in 100 people): Documented effects include hypersensitivity (allergic reaction), contact dermatitis, rash, bullous eruption (blisters), skin exfoliation (peeling), and sticky skin.

Reactions reported post-marketing, where frequency cannot be estimated (Not Known), include urticaria (hives) and, with shampoo/foam formulations, abnormal hair texture or hair discoloration.


Serious Adverse Reactions and Restrictions

Rare, serious adverse events documented primarily through post-marketing surveillance include anaphylaxis and severe hypersensitivity reactions.

Official labels contain high-level safety restrictions:

  • Local Intolerance: If significant irritation or signs of hypersensitivity develop, use of the medicine should be discontinued.
  • Corticosteroid Transition: When transferring from a topical corticosteroid, gradual withdrawal of the steroid is advised to help prevent a rebound effect of the underlying skin condition.

Population-Specific Safety Notes

The regulatory profile includes specific notes for certain populations:

Population Regulatory Safety Status
Pediatrics (<12 years) Safety and effectiveness have not been established.
Pregnancy Classified as Pregnancy Category C; use is only justified if potential benefit outweighs risk.
Nursing Mothers Caution is advised; systemic absorption is unlikely to lead to detectable quantities in breast milk.

Overdose and Emergency Response

Overdose and when to seek help

When to Seek Immediate Medical Attention

Immediate medical attention must be sought in all cases of known or suspected overdose, regardless of whether symptoms are currently present. An overdose occurs following the ingestion of a dose higher than the prescribed amount. Given the risk of serious complications, contacting emergency services or a poison control center right away is a critical step.

Documented Overdose Symptoms

Acute overdose with Ketomac has been officially associated with a range of symptoms, primarily affecting the central nervous system and the gastrointestinal tract. Symptoms reported in the event of an overdose may include nausea, vomiting, headache, dizziness, drowsiness, and somnolence. Other reported manifestations include abdominal pain, diarrhea, and a tingling sensation known as paresthesia.

Clinical Manifestations and Management

Beyond acute symptoms, an overdose may also be associated with evidence of abnormal liver function, which requires medical evaluation. Therefore, monitoring of vital signs and clinical status is instituted as part of supportive care. The documented emergency procedures that may be considered by healthcare professionals include gastric lavage and the administration of activated charcoal to limit drug absorption following a recent ingestion. The primary goal of management is to provide symptomatic and supportive care while monitoring the patient's condition until clinical stability is achieved.

Therapeutic Uses of Ketomac

Quick Facts: Ketomac Uses

  • Main Therapeutic Domains: Fungal skin conditions and seborrheic dermatitis.
  • May Help Address: Dandruff, ringworm (tinea corporis, tinea cruris), and pityriasis versicolor.

Ketomac, which contains the active ingredient ketoconazole, is an antifungal medication indicated for the topical management of various skin and scalp conditions caused by fungi or yeast.

Its primary use is to help address seborrheic dermatitis, a common condition that may lead to symptoms such as dry, flaky, and itchy skin on the scalp and other body areas. The medication is also utilized to help manage fungal skin infections like ringworm of the body or groin, and athlete's foot (tinea pedis). Additionally, it may be used to treat pityriasis versicolor (also known as tinea versicolor), which may result in irregular patches on the skin.

Ketoconazole works by interfering with the growth of the fungi responsible for these conditions, thereby helping to clear the infection and associated symptoms.

Eligibility and Restrictions for Use

Who Can and Cannot Use Ketomac? (Ketoconazole Topical)

Official regulatory documents define specific population eligibility for topical ketoconazole. Use is contraindicated for patients with a known hypersensitivity or documented allergic reaction to the active ingredient or any excipient in the formulation. The medicine is strictly not for ophthalmic use (in the eye).


Age-Related Eligibility

  • Adults and Adolescents (ge 12 years): This group is eligible for use, particularly for the 2% shampoo, foam, and gel formulations.
  • Children ( <12 years): Safety and effectiveness have not been established for most topical formulations in this age group, and use is generally not recommended.

Conditional Use and Restrictions

  • Pregnancy: The medicine is classified as Pregnancy Category C by the US FDA. Use is conditional and should occur only if the potential benefit justifies the potential risk to the fetus, due to limited data from adequate human studies.
  • Lactation: Caution is advised for nursing mothers, as it is not known if the drug is excreted in human milk.
  • Organ Function: No specific restrictions are documented for patients with hepatic (liver) or renal (kidney) impairment for the topical form, consistent with its minimal systemic absorption.

What should I know about interactions with other medicines?

Ketomac, which contains the active ingredient Ketoconazole for topical application, has a defined interaction profile largely determined by its lack of systemic absorption. Official government regulatory documents state that no formal drug interaction studies have been conducted for the cream, shampoo, or gel formulations. Due to the negligible absorption of Ketoconazole into the bloodstream, the likelihood of systemic drug-drug interactions, particularly those involving the cytochrome P450 (CYP) enzyme system, is considered very low.

Despite the low systemic risk, one specific restriction exists related to co-administered topical treatments. When initiating treatment with Ketomac 2% shampoo, there is a mandatory protocol for patients who have been using Topical Corticosteroids. The label requires these steroids to be gradually withdrawn over a two-to-three-week period. This timing-based constraint is essential to prevent a potential rebound effect that can occur upon the abrupt cessation of the corticosteroid.

The regulatory profile further specifies that the product is contraindicated in individuals with a known hypersensitivity to Ketoconazole or any other component present in the formulation. Furthermore, official government sources do not document any formal interaction constraints with food, alcohol, or herbal products for the topical formulations.

Mechanism of Action

The mechanism of action centers on inhibiting the biological processes required for fungal cellular function and structural integrity. The active agent acts as an enzyme inhibitor by specifically blocking the lanosterol 14α-demethylase ( CYP51 A1) enzyme, which is critical in the Fungal Sterol Biosynthesis Pathway.

Interrupting this pathway halts the conversion of lanosterol to ergosterol, the vital structural lipid of the fungal cell membrane. This block triggers a dual cascade: ergosterol depletion and the accumulation of toxic 14α-methylated sterols. These events severely compromise the membrane's fluidity and permeability, leading to the leakage of essential internal components. The resulting physiological consequence is the fungicidal (cell-killing) and fungistatic (growth-inhibiting) effect, reducing the pathogenic fungal population through cellular disruption. The mechanism involves interaction with fungal CYP51 A1 in preference to most human P450 enzymes.

Dosage and Administration Information

How to Use Ketomac

Ketomac, which contains the active ingredient ketoconazole, is an antifungal medication strictly formulated for Topical application to the skin and scalp. Usage instructions establish specific patterns for administration, which vary depending on the dosage form (cream, shampoo, gel, or foam) and the condition being managed.


Dosing and Frequency

The frequency and typical course duration are predetermined and are not interchangeable between formulations or indications. For many conditions, such as Tinea Corporis (ringworm of the body) or Cutaneous Candidiasis, the 2% cream is applied once daily for a course lasting two weeks. Conversely, the treatment for Tinea Pedis (athlete's foot) may require the cream to be applied once daily for up to six weeks.

For Seborrheic Dermatitis, administration varies: the cream or foam is typically applied twice daily, while the 2% shampoo is usually applied twice weekly for a four-week course. Pityriasis Versicolor, when treated with the shampoo, requires a single application course.


Administration Protocol and Constraints

The method of use is defined by the specific dosage form. When using the cream, the product is applied to the affected area and a small surrounding margin. For the 2% shampoo, instructions specify a necessary contact time: the product must be lathered onto wet hair, left in place for three to five minutes, and then rinsed thoroughly.

The usage protocol also establishes age restrictions, noting that the safety and effectiveness of the 2% cream and shampoo have not been established in pediatric patients younger than 18 years. It is essential to complete the full, specified course duration, regardless of whether the visual symptoms clear early.

Recent Clinical Evidence

Research evidence / Overview of studies for Ketomac


Evidence for use in Seborrheic Dermatitis and Dandruff

Research for the use of topical ketoconazole was conducted in populations with conditions characterized by fluctuating or episodic manifestations such as flaking, itching, and redness, and has primarily involved short-term, double-blind Randomized Controlled Trials (RCTs). The studies explored how symptoms like scaling and itching evolved in the observed populations, and also measured the count of Malassezia yeast, an organism that studies monitor in this condition.

Findings describe patterns observed in the studies related to the measurement of symptom scores (such as scaling and redness) over the defined time intervals. The research provides insight into short-term clinical status and the mycological assessment of the skin and scalp. However, long-term effects are not fully established for this condition. While studies report short-term patterns, there is limited information for how well the effects are maintained over many months.


Evidence for use in Pityriasis Versicolor

Research exploring how symptoms change over time for pityriasis versicolor has involved controlled clinical trials and systematic reviews. Studies were designed to evaluate the physical appearance of the skin and to monitor the mycological status. This was done through mycological assessment alongside the evaluation of clinical symptoms, sometimes combining both into a single success endpoint.

Studies report on the short-term clinical and mycological measurements taken after the treatment phase. Studies observed responses over defined time intervals to see how the condition evolved after the medicine was stopped, which provided context regarding potential recurrence.

Research does not fully characterize the timeline for the skin's natural repigmentation process, as this outcome takes longer than the typical study follow-up duration. Additionally, data are still emerging regarding the long-term recurrence rates for the topical formulation, and findings were mixed when recurrence patterns were evaluated against other types of antifungals studied.


Research Gaps and What Remains Uncertain

Most research studies exploring symptom change over time were conducted on adult populations. While research has included the study of the topical formulation in adolescent populations ( ge 12 years old), data for certain groups remain insufficient. For instance, there is limited information available for the safety and effectiveness patterns in infants and very young children (under 12 years of age).

Furthermore, follow-up durations were limited in many key efficacy trials, meaning long-term effects are not fully established, and the evidence quality varies across studies. Outcomes related to patient-reported perceived discomfort and overall quality of life are not a consistent focus in the current research.

Frequently Asked Questions (FAQ)

Common questions about Ketomac (FAQ)

Q: What is the difference between fungicidal and fungistatic action for Ketomac?

A: Official information regarding how antifungal medicines work explains the difference between two actions. A fungicidal action means the medicine is designed to actively kill the fungi. A fungistatic action means the medicine stops the fungus from growing or reproducing. Ketomac is reported to have both of these effects against the target pathogens.

Q: Should I stop using Ketomac once my symptoms go away?

A: According to the official product information, it is important to complete the full specified course of treatment. Regulatory guidance suggests the medication should be used for the entire duration, even if symptoms like itching or flaking appear to clear up early. This is intended to help ensure the infection is fully resolved.

Q: What are the signs of a severe allergic reaction that would require me to stop using Ketomac?

A: Regulatory documents indicate that topical ketoconazole is rarely associated with severe allergic reactions, including anaphylaxis. If signs of a severe allergic reaction occur, official warnings state that the medication should be discontinued and emergency medical attention should be sought. These signs may include hives, difficulty breathing or swallowing, or swelling of the face, lips, tongue, or throat.

Q: What is the typical timeframe for the skin to return to its normal color after treating pityriasis versicolor?

A: Studies and official information indicate that while the treatment removes the fungal infection, the skin’s process of returning to its normal color, known as repigmentation, takes longer. This natural process can continue for several weeks or even months after the treatment course is complete. Research into this specific timeline is limited.

Q: What should I do if I accidentally get Ketomac cream in my mouth?

A: Ketomac topical products are only for external use on the skin or scalp and are not for oral consumption. If accidental ingestion occurs, it is recommended that a healthcare provider or a poison control center be contacted for guidance, according to official safety advice.

Q: Is there a generic version of Ketomac?

A: Yes, Ketomac is a brand name for a medicine containing the active ingredient ketoconazole. Ketoconazole is the generic name for the drug and is widely available in generic topical formulations that are considered therapeutically equivalent to the brand name product.

Q: What is the difference in side effects between the cream and the shampoo formulation?

A: The official product safety information reports that side effects for both the cream and shampoo are primarily localized to the application site, such as itching or burning. For the shampoo and foam formulations, official post-marketing reports have also included instances of abnormal hair texture or hair discoloration.

How should Ketomac be stored and disposed of?

How to Store and Dispose of Ketomac

Ketoconazole-containing products must be stored under specific environmental conditions as defined by regulatory documents to maintain stability.

Official Storage Requirements

Condition Requirement (Official Labeling)
Temperature Store at Controlled Room Temperature (20°C to 25°C or 68°F to 77°F).
Protection Keep in a tightly closed, light-resistant container to protect from moisture.
Safety Store out of the reach of children.

Storage outside of the allowed range (e.g., freezing or prolonged exposure above 30°C) should be avoided. Disposal of unused or expired medication must be handled according to local regulations or a drug take-back program. It is officially advised not to flush the product down a toilet or pour it down a drain.

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

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