About this trial
This randomised controlled trial aims to compare the efficacy of topical metformin (30%) and topical tranexamic acid (3%) in the treatment of melasma using reduction in the Melasma Area and Severity Index (MASI) score over 12 weeks. Melasma is a common hyperpigmentation disorder with significant cosmetic and psychological impact, and current treatments often have limitations. Both metformin and tranexamic acid have shown promising depigmenting effects through different mechanisms. A total of 70 patients will be enrolled and randomly divided into two groups. Participants will apply the assigned treatment once daily along with sunscreen and will be assessed at baseline and at 4, 8, and 12 weeks. The primary outcome is MASI score reduction, while secondary outcomes include patient-reported improvement and safety. This study seeks to provide comparative evidence for safer and more effective treatment options for melasma management.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Patients aged 18-50 years
Clinically diagnosed facial melasma
Both genders
Patients willing to give informed consent
Disqualifiers
• Pregnant or lactating women
Patients using systemic or topical melasma treatments in the previous 4 weeks
Known hypersensitivity to study medications
Presence of other facial dermatoses
Trial design
Parallel
Treatments tested in this trial
topical 3% tranexamic acid solution
Drugnightly topical 3% tranexamic acid solution for 12 weeks with mineral sunscreen
Topical 30% metformin cream
DrugParticipants will apply topical 30% metformin once a night for 12 weeks, with concurrent use of mineral sunscreen.
Treatment groups
Trial outcomes
Primary outcomes
Mean reduction in MASI (MASI) score
Compare the mean reduction in MASI scores from baseline to 12 weeks between topical 30% metformin and 3% tranexamic acid.
Secondary outcomes
Patients with adverse effects
Proportion of participants developing adverse effects (erythema, burning, peeling/dryness, or dyspigmentation) during treatment, compared between groups at follow-up visits.
Sponsors and contacts
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