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Ketoconazole sampunas is a common topical antifungal drug widely used in the field of dermatology to treat various skin fungal infections. The core ingredient ketoconazole, with the chemical name cis-1-acetyl-4- [4- [[2- (2,4-dichlorophenyl) -2- (1H-imidazol-1-ylmethyl) -1,3-dioxolan-4-yl] methoxy] phenyl] piperazine, has a molecular formula of C26H28Cl2N4O4 and a molecular weight of 531.431. In terms of physical form, it appears as a white to off white crystalline powder with specific physical parameters, such as a melting point of 146 ℃, a boiling point of 753.4 ℃, a density of 1.38g/cm ³, a flash point of 409.4 ℃, and is insoluble in water. These chemical properties determine their special requirements during storage and use, typically requiring sealed storage in a low temperature, dry place, and away from oxidants to ensure their chemical stability and effectiveness.
(1) Drug name
Ketoconazol ointment, commonly known as Ketoconazol Cream in English.
(2) Drug type
Belonging to skin medication, it is a topical antifungal drug.
(3) Drug properties
Generally, it is a milky white or slightly red ointment with an emulsion matrix, with a uniform texture and easy to apply.
(4) Main components
The main ingredient is ketoconazol, and the excipients usually include stearic acid, white Vaseline, monostearic acid glycerin, preservatives (such as hydroxyethyl methacrylate), etc. Ketoconazol ointment produced by different manufacturers may have slight differences in excipient composition, but the content and mechanism of action of the main active ingredient ketoconazol are consistent.
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Additional information of chemical compound:
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Ketoconazole sampunas ointment is mainly used to treat the following skin fungal infections:
Superficial fungal infection of the skin
Tinea manus: caused by fungal infection of the skin on the hands, manifested as redness, blisters, peeling, itching, and other symptoms between the palms and fingers. Ketoconazole ointment can effectively inhibit the fungus that causes tinea manus, reduce inflammatory reactions, alleviate itching symptoms, and promote the restoration of normal skin.
Tinea pedis: commonly known as "beriberi", it is a common fungal infectious diseases that occurs in the foot skin. Patients often experience symptoms such as foot itching, peeling, blisters, erosion, etc., which can seriously affect walking and daily life. Ketoconazol ointment can be applied topically, directly to the infected area, killing fungi and improving symptoms.
Tinea corporis: refers to a fungal infection of the skin that occurs in areas other than the scalp, hair, palms, soles, and nails. Manifested as round or oval erythema with clear edges, surrounded by papules and blisters, accompanied by varying degrees of itching. Ketoconazol ointment has a good inhibitory effect on fungi that cause tinea corporis, helping to eliminate skin lesions and relieve itching.
Tinea crus: a fungal infection of the skin that mainly occurs in the groin, perineum, perianal area, and buttocks. Due to the thin and tender skin of these areas, as well as their moisture and excessive sweating, they are prone to the growth of fungi. Patients often experience severe local itching, with skin lesions appearing as circular or semi-circular erythema with raised edges. Ketoconazol ointment can effectively treat tinea crus, alleviate symptoms, and prevent further progression of the condition.
Tinea versicolor: also known as sweat spots, is a superficial infection caused by Malassezia invading the stratum corneum of the skin. Manifested as circular or irregular light brown, light yellow, or white patches on the skin, with small pityroid scales on the surface, generally without conscious symptoms, but may worsen after sweating or sun exposure. Ketoconazol ointment has an inhibitory effect on Malassezia and can be used to treat tinea versicolor and improve skin appearance.
Candidiasis of the skin
Caused by Candida infection of the skin, it can occur in any part of the body, commonly in skin folds such as armpits, groin, and under the breast. Manifesting as redness, papules, blisters, erosion, exudation, etc. on the local skin, accompanied by itching or burning sensation. Ketoconazole ointment has good antibacterial activity against Candida, which can control infections and alleviate symptoms.
Other related diseases
Ketoconazol ointment can also be used to treat other skin diseases caused by the aforementioned fungi, such as pityrosporum folliculitis. Pityrosporum folliculitis is a follicular skin fungal disease caused by Malassezia furfur, which is more common in the chest, back, and upper arms. It is characterized by follicular hemispherical papules or small pustules, accompanied by varying degrees of itching. Ketoconazol ointment can inhibit the growth of Malassezia furfur and improve symptoms of folliculitis.
Usage and dosage
Preparation before use
Before using ketoconazole ointment, the affected area should be washed with warm water and mild soap to remove local dirt, secretions, scales, etc. Then, the affected area should be gently wiped dry with a clean towel to keep the skin clean and dry, which is conducive to the absorption of the drug.
Application method
Take an appropriate amount of ketoconazole ointment, usually the size of a pea or adjusted according to the size of the affected area. Apply it evenly to the affected area and surrounding skin, gently massage for a moment to promote drug penetration. Be careful to apply the ointment to the entire infected area, including easily overlooked areas such as skin folds, to ensure that the medication can fully exert its effects.
Usage frequency
Normally, ketoconazol ointment is used twice a day, once in the morning and once in the evening. But the specific frequency of use can be adjusted according to the severity of the condition and the guidance of the doctor. For patients with mild symptoms, it may be sufficient to use it once a day; For patients with severe or recurrent conditions, doctors may recommend increasing the frequency of use appropriately.
Course of treatment
In order to completely cure fungal skin infections, medication should be continued according to the doctor's requirements. In general, to reduce recurrence, for tinea corporis, tinea pedis, tinea versicolor, and candidiasis, it should be used continuously for 2-4 weeks; Hand and foot tinea should be used continuously for 4-6 weeks. Do not stop taking medication immediately after symptoms have improved, as it may lead to incomplete eradication of fungi and result in disease recurrence. If the symptoms do not improve or worsen during use, seek medical attention promptly and adjust the treatment plan.
chemical reactivity
Reaction with potassium bismuth iodide
Ketoconazol can react chemically with potassium bismuth iodide to form an orange red precipitate. This reaction is commonly used in the identification experiments of ketoconazol. In the quality inspection process of preparing ketoconazol ointment, this reaction can also be used to detect whether the ointment contains ketoconazole components and whether its content meets the regulations.
UV absorption characteristics
Ketoconazol has certain absorption characteristics in the ultraviolet region. Take an appropriate amount of ketoconazol solution and measure it with a UV spectrophotometer. The maximum absorption is at the wavelengths of 221 nm and 269 nm, and there is a shoulder peak at the wavelength of 276 nm. This characteristic can be used for quantitative analysis of ketoconazol. By measuring its absorbance at specific wavelengths, the concentration of the drug solution can be calculated, thereby controlling the quality of ketoconazol ointment.
Interactions with other substances
Ketoconazole ointment not only contains ketoconazol, but also various excipients such as stearic acid, white Vaseline, monostearic acid glycerin, preservatives (such as hydroxyethyl methacrylate), etc. There may be some interaction between these excipients and ketoconazol. For example, excipients may affect the solubility, stability, and release performance of ketoconazol. Oil based excipients such as stearic acid and white Vaseline can dissolve or disperse ketoconazol, forming a uniform ointment matrix; Preservatives can prevent the ointment from being contaminated by microorganisms during storage, ensuring the quality and safety of the drug. However, the interaction between excipients and ketoconazol may also be complex and requires thorough research and optimization during the formulation development process to ensure the quality and efficacy of the ointment.
When ketoconazole ointment is applied to the skin, ketoconazol will interact with skin components. The main components of the skin include the stratum corneum, lipids, proteins, etc. Ketoconazol can penetrate into the interior of the skin through the stratum corneum and act on fungi at the site of infection. Its interaction with skin lipids may affect the permeability and distribution of drugs in the skin. In addition, ketoconazol may also bind to proteins in the skin, but this binding is generally reversible and does not affect the antifungal activity of the drug.
Although Ketoconazole sampunas is a topical medication with limited systemic absorption, in some cases, it may still interact with other drugs used simultaneously. For example, if a patient uses ketoconazol ointment locally while also using other antifungal drugs or immunosuppressants systemically, it may increase the risk of adverse drug reactions or affect the efficacy of the drug. In addition, some excipients in ketoconazole ointment may interact with other drugs, so when using ketoconazol ointment, doctors should be informed of the other drugs being used so that they can assess the risk of drug interactions.
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