Shorter or longer? study tests best duration for fungal shampoo treatment
NCT ID NCT07471178
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at whether using ketoconazole 2% shampoo for seven days works better than using it for three days to treat pityriasis versicolor, a common fungal skin condition that causes discolored patches. About 76 people aged 12 and older with confirmed infection will be randomly assigned to one of two treatment lengths. The main goal is to see which duration clears the fungus more effectively, while also checking for side effects.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 4
Runs after approval, following long-term safety and how well the treatment works in everyday use.
- Participants
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About 76 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Feb 2026
An estimate. Start dates often move.
- Expected to finish
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Jun 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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12 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Male and female patients aged 12 years or older * Patients with pityriasis versicolor confirmed mycologically by the presence of short hyphae and round spores on direct microscopic examination using potassium hydroxide (KOH) preparation and Parker Blue-Black® ink * Patients who are willing to participate in the study and provide written informed consent after receiving adequate explanation of the study; informed assent is obtained for participants younger than 18 years * Participants younger than 18 years who have written permission from a parent or legal guardian Exclusion Criteria: * Patients in an immobilized condition * Patients with pityriasis versicolor lesions limited exclusively to the face, without involvement of other body areas * History of hypersensitivity to ketoconazole * Use of systemic antifungal agents or systemic corticosteroids within one month prior to study enrollment * Use of topical antifungal agents or topical corticosteroids within two weeks prior to study enrollment * Patients with severe immunosuppression * Pregnant or breastfeeding women
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
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The official record
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