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IntroductionInsulin‐like growth factor 1 (IGF‐1) plays a role in the pathogenesis of acne vulgaris. Metformin can reduce IGF‐1 levels and insulin resistance, so it may be useful in treating acne.ObjectiveThis study compared the efficacy of metformin and doxycycline in treating patients with acne vulgaris.MethodsIn this assessor‐blind, add‐on, randomized controlled clinical trial, we enrolled 40 patients with moderate acne vulgaris aged 15–40 and randomly divided them into two groups. For two months, the first group received doxycycline 100 mg capsules daily, and the second received metformin 500 mg tablets twice daily. The patients in both groups were adminitered to apply a fingertip (fourth finger) of 5% benzoyl peroxide gel (Pangel®) topically every night over the lesions, and to wash it off after 30 min. Patients were evaluated using the Global Acne Grading System (GAGS) score, Investigator Global Assessment for Acne (IGA) score, Cardiff Acne Disability Index (CADI), Total Acne Lesion Count (TLC), and the number of inflammatory and noninflammatory lesions.ResultsBy the end of the study, the GAGS, IGA, CADI, and TLC scores and the number of inflammatory and noninflammatory lesions decreased significantly in both groups (p < 0.001), with no significant difference between the two groups (p > 0.05).ConclusionThis trial indicates equal efficacy of doxycycline and metformin in reducing acne vulgaris severity, with doxycycline performing better in reducing lesions of the inflammatory type. Confirmatory or equivalence clinical trials should be performed to confirm our results.

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Introduction: Melasma is one of the common dermatologic diseases that has an effect on the patient's quality of life, therefore its treatment is important. Various medicinal and herbal compounds have been used, including creams containing hydroquinone, vitamin C, alfa hydroxy acids, arbutin, tretinoins, and sometimes combination creams are prescribed, and there is still no definite and guaranteed treatment for it. In the present experimental study, the effect of topical medicine Atache Despigman (Atache laboratorios, Spain), which contains 2% hydroquinone, vitamin C and fruit acids) in the treatment of melasma has been investigated. After two months of treatment with this medicine, from the patients' point of view, the results of spot reduction were very good 17%, good 53%, average 25%, and poor 5%, and these percentages from the doctor's point of view were 20%, 52%, 25%, and 3%, respectively. Therefore, the majority observed the effectiveness. With the examination by Dermacatch device, a decrease in pigmentation was also observed.

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