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compositionComposition:KETOCONAZOLE-1%W/W
Ketofast Soap

Ketofast Soap is used to treat fungal infections of the skin like ringworm, jock itch, athlete's foot, seborrheic dermatitis (dry, flaky skin on the face, scalp, chest, upper back or ears) and pityriasis (a type of skin rash that causes scaly, discoloured patches on chest, back, legs and arms). It contains Ketoconazole which works by damaging the fungal cell membranes that are essential for their survival. Thus, it kills fungi and yeast. It may cause common side effects such as dry skin, itching, redness or burning sensation at the application site. Before using this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.

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Written By Veda Maddala , M Pharmacy
Reviewed By Santoshini Reddy G , M Pharmacy
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More about the Product

Composition :

KETOCONAZOLE-1%W/W

Consume Type :

Topical

Expires on or after :

Dec-28

Return Policy :

Not Returnable

About Ketofast Soap

Ketofast Soap is a topical antifungal medicine used to treat skin infections caused by fungi or yeast. It is commonly prescribed for skin conditions such as athlete's foot, jock itch, ringworm, sweat rash, and seborrheic dermatitis, which causes dry, flaky skin on your scalp or face.

To get the best results from your treatment, you must apply Ketofast Soap consistently and at the exact same times every day, even if your symptoms begin to clear up early. The medicine must be applied directly to the affected skin, which should be clean and completely dry before application. Making small lifestyle adjustments, such as wearing loose-fitting cotton clothes and drying your skin thoroughly after bathing, can help the treatment work more effectively.

While using Ketofast Soap, you may experience mild and temporary skin irritation, redness, or a slight burning sensation where the product is applied. These common side effects usually go away as your skin adjusts, but you should contact your doctor immediately if you experience severe burning, swelling, or blistering.

Do not use this medicine if you have open wounds, deep cuts, or severe skin damage at the application site. If you have any known allergies to other antifungal creams or skin products, talk to your doctor before starting Ketofast Soap to ensure it is safe for you to use.

Because Ketofast Soap is applied directly to the skin, very little of the medicine typically enters your bloodstream. However, absorption may increase when it is applied to large areas of skin, inflamed or damaged skin, or under airtight dressings. As a result, interactions with oral medicines are generally uncommon with topical use. However, if you are pregnant, planning to become pregnant, or breastfeeding, you should consult your doctor or pharmacist before using this treatment.

Uses of Ketofast Soap

Your doctor may prescribe Ketofast Soap to treat several types of fungal skin conditions. It is commonly used to treat:

  • Athlete's foot (tinea pedis): Ketofast Soap clears up the fungal infection between the toes, relieving itching, peeling, and burning.
  • Jock itch (tinea cruris): It targets fungal overgrowth in the groin area, soothing redness, chafing, and intense itching.
  • Ringworm (tinea corporis): It stops the spread of the circular, itchy rash on the body and helps the skin heal.
  • Seborrheic dermatitis and dandruff: It reduces yeast levels on the scalp and face, clearing up stubbornflakes, scaling, and redness.
  • Pityriasis versicolor: It helps restore natural skin tone by clearing the fungal patches that cause light or dark spots on the chest, back, or neck.
     

Key Benefits

Ketofast Soap brings real-world relief to uncomfortable and irritating skin conditions. By targeting the source of the fungal infection, it helps you feel better in several ways:

  • Quickly calms itching and discomfort: It rapidly soothes the intense itching and burning associated with fungal infections, allowing you to go about your day comfortably.
  • Restores skin health: It helps clear up embarrassing skin peeling, flaking, and redness, allowing your skin to heal and regain its natural texture.
  • Prevents the infection from spreading: Regular use stops the fungus from multiplying, which protects other parts of your body and prevents the infection from spreading to others.
     
Side effects of Ketofast Soap
Here are the key steps to manage medication-triggered Burning At Application Site:
  • Consult and seek guidance from a doctor or healthcare expert to determine the cause and best course of treatment.
  • Avoid harsh products, extreme temperatures, and other potential irritants that may exacerbate the issue.
  • Depending on the location and severity of the burning, your healthcare professional may recommend applying a soothing or protective agent, such as a cream, gel, or ointment.
  • Keep the affected area clean to promote healing and prevent further irritation.
  • Schedule follow-up appointments with your healthcare professional to monitor your symptoms and adjust your treatment plan as needed.
  • If the burning or irritation persists or worsens, seek medical attention for further guidance and treatment.

Directions for Use

To get the safest and most effective results from Ketofast Soap, follow these step-by-step instructions and always use the product exactly as your doctor has instructed:

  • Wash your hands thoroughly with soap and water before applying the medicine.
  • Clean the affected skin area gently with mild soap and water, then pat it completely dry with a clean towel.
  • Apply a thin layer of Ketofast Soap to the affected area and slightly onto the surrounding healthy skin.
  • Gently rub the cream or gel in until it is evenly distributed and absorbed.
  • Wash your hands with soap and water immediately after application to avoid spreading the infection to other areas of your body or to other people.
  • Do not cover the treated area with bandages, tight dressings, or plastic wraps unless your doctor specifically tells you to do so.
     

How Ketofast Soap Works

The active ingredient in Ketofast Soap, ketoconazole, works by targeting the microscopic cells responsible for fungal infections. The active medicine interferes with the ability of the fungus to build its own cell walls. Specifically, it stops the production of a vital substance called ergosterol, which fungi need to keep their cell membranes intact. Without a stable cell membrane, holes develop in the outer layer of the fungal cells. This causes the internal contents of the cell to leak out, which effectively kills the fungus and stops the infection from multiplying. This process allows your skin's natural healing systems to repair the damage and clear the rash.
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Alcohol

Consult your doctor

Interaction of Ketofast Soap with alcohol is unknown. Please consult a doctor before consuming alcohol while using Ketofast Soap.

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Pregnancy

Consult your doctor

Ketofast Soap is a Category C pregnancy drug and is given to a pregnant woman only if the doctor thinks the benefits outweigh the risks.

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Breast Feeding

Consult your doctor

Ketofast Soap is recommended for breastfeeding mothers only if needed. However, if Ketofast Soap is applied on the breast, care should be taken to avoid accidental ingestion by the baby.

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Driving

Safe if prescribed

Ketofast Soap usually does not affect your ability to drive or operate machinery.

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Liver

Consult your doctor

If you have any concerns regarding the use of Ketofast Soap in patients with liver problems, please consult a doctor.

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Kidney

Consult your doctor

If you have any concerns regarding the use of Ketofast Soap in patients with kidney problems, please consult a doctor.

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Children

Unsafe

Ketofast Soap is not recommended for use in children below 12 years of age as the safety and efficacy are not established.

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Heart

Consult your doctor

Please consult your doctor before using Ketofast Soap if you have pre-existing heart problems. Your doctor will prescribe Ketofast Soap if the benefits outweigh the risks.

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Geriatrics

Consult your doctor

Please consult a doctor before giving Ketofast Soap to geriatric patients. Your doctor will prescribe Ketofast Soap if the benefits outweigh the risks.

What if I have taken an overdose of Ketofast Soap

Do not apply Ketofast Soap in large amounts or use it for a long time than recommended, as it does not give quick or better results but increases the risk of side effects.

Diet & Lifestyle Advise

  • Keep the skin dry: Thoroughly dry your skin after showering or bathing, paying close attention to skin folds, the spaces between your toes, and your groin area.
  • Choose breathable clothing: Wear loose cotton clothing and cotton underwear. Avoid synthetic fabrics that trap moisture and sweat against your skin.
  • Avoid sharing personal items: Do not share towels, clothing, combs, hairbrushes, or footwear with others, as fungal spores can easily spread from person to person.
  • Manage sweat: Change out of sweaty gym clothes or wet swimwear as quickly as possible to prevent creating an ideal environment for fungi to grow.
  • Wash linens frequently: Wash your towels, bed sheets, and socks in hot water regularly to kill any lingering fungal spores.
     

Have a query?

How Soon It Starts Working

  • The time required for Ketofast Soap to start to work: The time required for Ketofast Soap to show its action is unknown.
  • The time for which the effects of Ketofast Soap last: The duration of action for Ketofast Soap is unknown.

Storage

Store the medicine at room temperature, ideally between 15°C and 30°C. Do not freeze the product. •Keep the tube or bottle tightly closed when you are not using it to prevent contamination.

What if you forget to take Ketofast Soap

Apply the missed dose as soon as you can. If it is almost time for the next dose, skip the missed dose and follow your regular schedule.

Drug Warnings

  • Avoid Contact with Eyes and Mouth: Apply Ketofast Soap only to the affected skin or scalp. If it accidentally gets into your eyes, nose, or mouth, rinse thoroughly with plenty of cool water.
  • Complete the Full Course: Continue using Ketofast Soap for the full duration prescribed by your doctor, even if your symptoms improve or disappear earlier.
  • Check Before Use: Inspect the tube or bottle before use. Do not use the product if the packaging is damaged or if the cream has changed colour or developed an unusual odour.
  • Avoid Using Other Topical Products: Do not apply other medicated creams, ointments, or cosmetic products to the same treated area unless advised by your doctor.
  • Use Only as Directed: Avoid applying Ketofast Soap to large areas of damaged skin or covering the treated area with airtight dressings unless specifically instructed by your doctor. 
     

Drug-Drug Interactions

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Drug-Drug Interactions

The following products may interact with topical Ketofast Soap and may require special precautions:

  • Topical steroids and other skin treatments: If you are using steroid creams, medicated lotions, or other topical treatments on the same area of skin, tell your doctor. They will advise you on the safest way to use these products together and help minimise irritation. 

Drug-Disease Interactions

Inform your doctor if you have a history of the following conditions before using Ketofast Soap, as they may require special precautions:

  • Severe skin conditions: If you have active eczema, psoriasis, or highly sensitive skin, using Ketofast Soap may cause temporary irritation or localised burning. Talk to your doctor before starting treatment.
No Drug - Drug interactions found in our data. We may lack specific data on this medicine and are actively working to update our database. Consult your doctor for personalized advice

Drug-Drug Interactions

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Drug-Food Interactions

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No Drug - Food interactions found in our database. Some may be unknown. Consult your doctor for what to avoid during medication.

Drug-Food Interactions

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All Substitutes & Brand Comparisons

Habit Forming

No

Therapeutic Class

[ANTIFUNGALS]

FAQs

Ketofast Soap is used to treat Fungal skin infections.
Yes, fungal infection is a contagious skin condition that spreads from one person to another through direct skin-to-skin contact or by contact with contaminated soil or surfaces and infected animals. Therefore, it is recommended to avoid close direct contact until the infection is clear and avoid sharing things with the infected person as it can also spread the infection.
Yes, Ketofast Soap may cause skin reactions such as contact dermatitis (red, itchy skin rash caused by direct contact with a certain substance) as it may contain stearyl alcohol and cetyl alcohol responsible for causing such skin reactions. However, if the irritation worsens or persists, please consult a doctor.
You are recommended to use Ketofast Soap for as long as your doctor has prescribed it. However, if the condition worsens or persists after 2 to 4 weeks of treatment with Ketofast Soap, please consult a doctor.
No, Ketofast Soap is not a steroid cream. It contains Ketoconazole, which is an antifungal medication used to treat fungal infections.
Common side effects of Ketofast Soap include dry skin, itching, redness, and a burning sensation at the application site. However, it's essential to note that these side effects may occur in some individuals but not everyone. They are usually mild and temporary, but it's best to consult your doctor if they persist or worsen.
It's generally not recommended to use a steroid cream along with Ketofast Soap without consulting your doctor first. Combining these medications may increase the risk of side effects or reduce their effectiveness. Always consult your doctor for guidance on using multiple medications simultaneously.
Before applying Ketofast Soap, wash and dry the infected skin area. Take a small amount on your finger and gently apply it to the clean, dry, affected area and surrounding skin. Remember to use it for external purposes only, avoiding contact with eyes, nose, and mouth. If accidental contact occurs, rinse with water thoroughly. Finally, wash your hands before and after application unless your hands are the affected area.
If you forget to use Ketofast Soap, apply it as soon as you remember. Then, continue with your regular application schedule. Do not apply extra cream to make up for the missed dose.
Ketofast Soap contains Ketoconazole, which works by damaging the fungal cell membranes, which are essential for their survival as they prevent the entry of unwanted substances into the cells and stop the leakage of cell contents. Thus, it kills fungi and yeast.
Unless your doctor advises, do not use other medicated topical products with Ketofast Soap.
If you see no improvement after using Ketofast Soap, consult your doctor. They will assess your condition and provide further guidance or recommend alternative treatments.
Most people begin to notice improvement in itching, redness, or scaling within a few days of starting treatment. However, fungal infections often require several weeks of regular use to clear completely, and treatment duration varies depending on the condition being treated. If your symptoms do not improve, worsen, or show signs of infection such as increasing pain, swelling, pus, or spreading redness, talk to your doctor.
Yes, Ketofast Soap can be used on the face for conditions like seborrheic dermatitis, but you must be extremely careful to avoid your eyes, nose, and mouth. If the medicine accidentally gets into your eyes, rinse them immediately with water. Talk to your doctor before applying it to sensitive facial skin.
It is best to avoid applying makeup, sunscreens, or other cosmetics directly over the treated area immediately after applying Ketofast Soap. Allow the medicine to absorb fully into your skin first, or check with your doctor for advice on your skincare routine.
Because Ketofast Soap is applied directly to the skin, very little of it enters your body. However, you should still talk to your doctor or pharmacist before using it if you are pregnant or breastfeeding to make sure it is completely safe for your specific situation.
Mild flaking can occur as your infected skin heals and sheds. However, if you experience severe skin peeling, cracking, pain, or blistering, stop using the product and talk to your doctor immediately, as this could be a sign of an allergic reaction or severe irritation.
No, you must continue using Ketofast Soap for the entire length of time prescribed by your doctor, even if your skin looks completely healed. Stopping the treatment too early may allow the remaining fungus to grow back, causing the infection to return.
No, this topical formulation of Ketofast Soap is designed only for external skin and scalp infections. It should not be used internally or for vaginal yeast infections unless specifically directed by your doctor. Talk to your doctor for appropriate treatment options.
If Ketofast Soap is accidentally swallowed, seek medical help or contact a poison control centre immediately. While it is safe for skin application, swallowing topical formulations can cause stomach upset, nausea, or other health issues. Talk to your doctor if you have concerns.

Disclaimer

While we strive to provide complete, accurate, and expert-reviewed content on our 'Platform', we make no warranties or representations and disclaim all responsibility and liability for the completeness, accuracy, or reliability of the aforementioned content. The content on our platform is for informative purposes only, and may not cover all clinical/non-clinical aspects. Reliance on any information and subsequent action or inaction is solely at the user's risk, and we do not assume any responsibility for the same. The content on the Platform should not be considered or used as a substitute for professional and qualified medical advice. Please consult your doctor for any query pertaining to medicines, tests and/or diseases, as we support, and do not replace the doctor-patient relationship.

Reference

  1. Drugs.com Clinical Review Team. Ketoconazole Topical Clinical Drug Monograph. Auckland, NZ: Drugs.com; 2026. [Accessed on 02 Jun. 2026] Check here
  2. U.S. Food and Drug Administration (FDA). 021946S005Lbl [FDA Prescribing Information]. Silver Spring, MD: FDA; 2024. [Accessed on 02 Jun. 2026] Check here
  3. Ketoconazole cream [Prescribing Information]. 2014. [Accessed on 10 Jun. 2025] Check here
  4. Ketoconazole [Summary of Product Characteristics]. 2023. [Accessed on 10 Jun. 2025] Check here
  5. Ketoconazole Ketoconazole. 2026. [Accessed on 01 Apr. 2026] Check here
  6. Ketoconazole 2% w/w Shampoo - Summary of Product Characteristics (SmPC) - (emc) [Internet]. Medicines.org.uk. 2021 [Accessed on 31 Oct 2025] Check here
  7. Ketoconazole (Topical Route) Description and Brand Names - Mayo Clinic [Internet]. Mayoclinic.org. 2021 [Accessed on 31 Oct 2025]Check here

Country of origin

India

Manufacturer/Marketer address

sco-299, 2nd floor, sector 20, panchkula, haryana, 134120, india
Other Info - KE92732

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