Seborrheic dermatitis, a common skin condition, manifests as scaly rashes and flaking, particularly on oily areas of the skin like the scalp and face. While the exact cause remains uncertain, a fungus called Malassezia yeast is believed to play a significant role. This is supported by the effectiveness of topical antifungal products in alleviating symptoms by targeting and killing the yeast. This article explores common antifungal products, including shampoos, used to manage seborrheic dermatitis and how they address the suspected fungal cause.
Malassezia is a type of yeast naturally present on the skin. In some individuals, a reaction to this yeast triggers inflammation, leading to the characteristic symptoms of seborrheic dermatitis: rashes, flaking, scaly skin patches, and itching.
Antifungals work by reducing the amount of yeast on the skin, thereby mitigating the inflammatory response. These products come in various forms, including topical applications (gels, lotions, foams, cleansers, and shampoos) and oral pills. They are available both over the counter (OTC) and by prescription, offering a range of options for managing the condition.
It's important to adhere to the specific instructions for each antifungal product. Consulting a healthcare provider about the appropriate frequency and duration of use is essential. Medicated shampoos typically require lathering and leaving the product on the scalp for approximately five minutes before rinsing. Some can also be used as body washes. While topical antifungals are generally safe for continuous use, overuse may lead to dryness.
When selecting an antifungal shampoo or cream, look for these common antifungal agents in the product's ingredient list. Most are available in both OTC and prescription strengths. A dermatologist can recommend the best product or combination of products for your skin.
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Ketoconazole, sold under brand names like Extina, Ketodan, Nizoral, and Xolegel, is a frequently prescribed topical antifungal treatment available as a cream, foam, or shampoo. Studies suggest its effectiveness is comparable to steroids, but with fewer side effects. Potential side effects include dry scalp or a stinging sensation.
Ketoconazole shampoo is a medicated shampoo designed to treat fungal infections that affect your scalp. You can use it to treat conditions such as stubborn dandruff and psoriasis. Shampoos containing ketoconazole are available both over the counter (OTC) and by prescription from your doctor.
OTC ketoconazole shampoos contain 1% or less of ketoconazole. The most commonly known OTC brand is Nizoral, which is available in most supermarkets and online.
You can get shampoos that contain 2% or more of ketoconazole with a prescription from your doctor. Brands available by prescription include: Ketozal, Ketozolin, Ket Med.
Ketoconazole shampoo is commonly advertised as a dandruff treatment, with OTC brands like Nizoral available for purchase in supermarkets or online. Dry scalp causes some dandruff, but other dandruff can be due to seborrheic dermatitis. Seborrheic dermatitis may be associated with an overgrowth of Malassezia, a yeast fungus that’s naturally present on your skin. Ketoconazole can help treat dandruff by reducing the fungus and decreasing inflammation.
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Ketoconazole is a common treatment for psoriasis, another inflammatory skin disease that causes skin flaking, skin plaques, and redness or other skin discoloration. Yeast-like fungus often infects these skin plaques. Prescription ketoconazole may be necessary to treat psoriasis flares.
Ketoconazole shampoo can also treat tinea capitis and tinea versicolor. Tinea capitis is a superficial, ringworm-like fungus infection that can affect your scalp. Tinea versicolor is a skin infection caused by overgrowth of a type of yeast that naturally lives on your skin.
While ketoconazole is most often used for its antifungal properties to treat infections or conditions such as seborrheic dermatitis, some evidence suggests that it may also help promote hair growth or reduce hair loss. However, more research is necessary to investigate this possibility.
Before using ketoconazole, you should be aware of the side effects it may cause. One of the most common side effects is skin irritation, which can take the form of pimple-like bumps on your skin where you’ve used the product. Ketoconazole shampoo might also cause oiliness or dryness of your hair or scalp, changes in hair texture, or discoloration. If your hair is permed, ketoconazole may cause your hair to lose its curl. In rare cases, ketoconazole shampoo can result in hair loss. Talk with your doctor right away if you notice this side effect.
Allergic reactions to ketoconazole shampoo are extremely rare but should be taken seriously. Seek medical attention right away if you have symptoms of an allergic reaction, such as: severe itching, swelling of your face, tongue, or throat, difficulty breathing, rash, dizziness. Anaphylactic reactions and other severe hypersensitivities have also been reported with ketoconazole use.
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Ketoconazole’s effects in people who are pregnant or breastfeeding have not been well studied. If you’re pregnant and have concerns about using an antifungal treatment, talk with your doctor before using even the OTC version of this antifungal shampoo. The safety of ketoconazole in children has not been well studied, either. It’s best not to use ketoconazole shampoo on children under 12 years of age unless instructed to do so by their pediatrician.
You should use a ketoconazole shampoo as instructed by your doctor or as indicated on the product label. To use it on your scalp, apply the shampoo to wet hair. Lather it well and give it time to soak into your scalp before rinsing. You can then condition the ends of your hair, rinse, and dry as you usually would. If you’re using ketoconazole shampoo on an area other than your scalp, apply it to the affected area and let it sit for 5 minutes. Wash it off thoroughly with water, and then dry your skin.
How often and how long you’ll use the shampoo will depend on several factors, such as: the strength of the shampoo (1% for the OTC version or 2% for the prescription version), the condition you’re using it to treat, the severity of your current symptoms. Based on these factors, your doctor might ask you to use the shampoo anywhere from every other day to once per week. Use ketoconazole shampoo exactly as your doctor recommends. Do not use it more or less frequently than your doctor tells you to.
You should start to see results within 2 to 4 weeks after you begin using the shampoo, unless your doctor tells you otherwise for your particular condition. If you don’t see any improvement after a month, ask your doctor whether a different treatment option is necessary. If ketoconazole shampoo doesn’t work to treat your skin condition, you might need to try an alternative. Options might include other medications, such as oral antifungals, to help treat your overall condition or more widespread infections. There are also other medicated shampoos that you can try.
KETOCONAZOLE (kee toe KON na zole) treats fungal or yeast infections of the skin. It belongs to a group of medications called antifungals. It will not treat infections caused by bacteria or viruses.
They need to know if you have any of these conditions: Large areas of burned or damaged skin, an unusual or allergic reaction to ketoconazole, other medications, foods, dyes, or preservatives, pregnant or trying to get pregnant, breast-feeding.
This medication is for external use only. Do not take by mouth. Wash hands before and after use. Do not get this medication in your eyes. If you do, rinse them out with plenty of cool tap water. Use this medication as directed on the prescription label at the same time every day. Do not use it more often than directed. Use the medication for the full course as directed by your care team, even if you think you are better. Do not stop using it unless your care team tells you to stop it early.
Wet the skin and apply the medication to the areas to be cleansed. Massage gently into the skin working it into a full lather. Leave in place for 5 minutes. Rinse thoroughly with plain water. Pat the skin dry. If you are using this product on your scalp, you do not need to use regular shampoo after every application.
If you miss a dose, use it as soon as you can. If it is almost time for your next dose, use only that dose. Do not use double or extra doses.
Interactions are not expected. Do not use any other skin products without telling your care team.
Visit your care team for regular checks on your progress. Tell your care team if your symptoms do not start to get better or if they get worse. If your hair has been permanently waved, this medication may remove the curls from your hair.
Side effects that you should report to your care team as soon as possible: Allergic reactions-skin rash, itching, hives, swelling of the face, lips, tongue, or throat, burning, itching, crusting, or peeling of treated skin. Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome): Change in hair color or texture, hair loss, irritation at application site.
Clotrimazole, sold under brand names Lotrimin and Mycelex, is a topical antifungal cream often used for fungal conditions like athlete’s foot or yeast infections. It is also recommended for seborrheic dermatitis. Potential side effects include rash, hives, and other forms of skin irritation. It’s sometimes used effectively in combination with topical steroid creams.
Ciclopirox, sold under the brand name Loprox, is most often recommended in shampoo form. It’s effective in managing symptoms when used one to three times per week and can be used in combination with other products.
Selenium sulfide is available as a shampoo, lotion, or foam and is the primary antifungal ingredient in Selsun Blue. It is also found (in combination with other ingredients) in Head & Shoulders shampoo. The Mayo Clinic recommends using over-the-counter selenium sulfide shampoo at least twice per week and medicated lotion once or twice per week. Individuals with blonde or gray hair should rinse selenium sulfide shampoo thoroughly to prevent bluish hair discoloration. It can also be used to treat facial symptoms.
Coal tar is a mild ingredient with antibacterial and antifungal qualities, inhibiting the growth of yeast. Coal tar topical cream is sometimes sold under the brand Psorigel, and coal tar shampoo is often sold as T-Gel.
In addition to antifungal treatments, lifestyle changes can significantly contribute to managing seborrheic dermatitis symptoms:
If symptoms persist or worsen, consult a healthcare provider or dermatologist for personalized management and the most suitable treatment plan.
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