BACKGROUND

Acne vulgaris is a common skin disorder among adolescents and young adults, with a worldwide prevalence of 9.4%. Both 5% dapsone gel and 5% benzoyl peroxide gel (BPO) have been reported in literature to have antimicrobial action against Cutibacterium acnes.

To compare the efficacy and safety of 5% dapsone gel versus 5% BPO gel in Filipino patients with mild to moderate acne vulgaris in a tertiary hospital.

Phase 1 involved compounding 5% dapsone gel and assessing its safety in healthy individuals through a repeated open application test in 30 participants. In phase 2, a double- blinded experimental study compared the efficacy and safety of both groups. Participants were randomized through block design. Efficacy and safety was assessed using the Global Acne Assessment Score (GAAS) and lesion count, and monitoring the adverse effects. The Cardiff Acne Disability Index (CADI) questionnaire was utilized to evaluate the impact on quality of life.

In phase 1, 56.7% of the participants were female and the only reported adverse event was pruritus (13.3%). In phase 2, both the BPO and dapsone group had 35 participants enrolled. Most are female (75.7%) with a mean age of 24. Results showed improvement in the GAAS from moderate to mild, a decrease in inflammatory and non-inflammatory lesions, and a reduction in side effects during the succeeding visits in both groups.

5% dapsone gel and 5% BPO were both efficacious and safe for mild to moderate acne management.

Background: Due to the high prevalence and incidence of leprosy in the Philippines, there is a continuing need to detect and document the occurrence of dapsone-induced hemolytic anemia. Objective: The aim of this study is to determine the incidence of dapsone-induced hemolytic anemia in non-glucose-6-phosphate dehydrogenase deficient leprosy patients receiving multidrug therapy (MDT) in Southern Philippines Medical Center. Methodology: This is a retrospective study through chart review of leprosy patients treated with MDT regimen at Southern Philippines Medical Center from January 2016 to December 2018. The demographic profile, clinical characteristics, hemoglobin and hematocrit concentrations before and after initiation of MDT, the presence of symptoms of anemia, and the occurrence of dapsone-induced hemolytic anemia in leprosy patients were collected. The main outcome measure for this study was the incidence rate of dapsone- induced hemolytic anemia. Statistical-based analysis were used for continuous and categorical data which were summarized using means and standard deviations, and frequencies and percentages, respectively. Results: There was a decrease in the mean hemoglobin and hematocrit levels noted in the majority of patients after initiation of MDT from baseline 143.46 g/dl and 0.44, respectively, to 94 g/dl and 0.28 on the third month of MDT. The incidence rate of dapsone-induced hemolytic anemia during the 3-year period was 20 cases per 100. Conclusion The relatively high incidence rate of dapsone-induced hemolytic anemia highlights the importance of frequent monitoring of hemoglobin and hematocrit concentrations in leprosy patients being treated with multidrug therapy.
Hansen&rsquo ; s disease ; leprosy ; Dapsone ; hemolytic anemia

INTRODUCTION: Actinomycetoma is a neglected infectious disease that presents with a triad of subcutaneous mass, with sinus formation and seropurulent discharge containing grains. This causes severe functional disability to patients if not treated early and properly. CASE REPORT: We report a case of a 62-year-old adult Filipino farmer diagnosed with actinomycetoma of the left foot. For 8 years, the patient medicated with several antibiotic therapies affording minimal improvement of symptoms. Hence, surgical intervention with combination antimicrobial therapy was done which provided resolution of symptoms, improving the quality of life of the patient. CONCLUSION Treatment of actinomycetoma must be individualized among patients. Although oral antibiotics became the standard of treatment, combining surgical treatment with oral medications may be considered to ensure effective management of the disease.
actinomycetoma ; cotrimoxazole ; dapsone ; surgery ; case report

Humans ; Dapsone/adverse effects* ; Drug Hypersensitivity/etiology* ; Hypersensitivity ; Syndrome

A 61-year-old man presented with a 3-year history of erythematous firm nodules on the hands and feet. Histopathological findings of the lesional skin revealed perivascular and diffuse neutrophilic infiltrations on the upper and mid-dermis. Increased and dilated blood vessels were observed in the upper dermis. Fibrinoid necrosis of the vessel walls was unremarkable, but endothelial swelling and scant red blood cell (RBC) extravasation were noted. Fibrosis and sclerosis of collagen fibers were noted on the deep dermis. Results of laboratory examinations, including complete blood count (CBC), routine chemistry, c-reactive protein (CRP), syphilis and human immunodeficiency virus (HIV) tests, and serum immunoglobulin electrophoresis, were all negative or within normal limit. A diagnosis of erythema elevatum diutinum was made based on the clinical and histological findings. The patient was treated with prednisolone, dapsone, colchicine, and intralesional injection of triamcinolone and showed slight improvement after treatment for 8 months.
Blood Cell Count ; Blood Vessels ; C-Reactive Protein ; Chemistry ; Colchicine ; Collagen ; Dapsone ; Dermis ; Diagnosis ; Electrophoresis ; Erythema ; Erythrocytes ; Fibrosis ; Foot ; Hand ; HIV ; Humans ; Immunoglobulins ; Injections, Intralesional ; Middle Aged ; Necrosis ; Neutrophils ; Prednisolone ; Sclerosis ; Skin ; Syphilis ; Triamcinolone

No abstract available.
Ascorbic Acid ; Dapsone ; Methemoglobinemia

Introduction: Sneddon-Wilkinson disease (SWD) is a rare, recurrent neutrophilic dermatosis presenting as sterile pustules, with a predilection for flexural and intertriginous areas. Case summary: A 49-year-old Filipino female presented with a three-year history of recurrent pustules and papules on the flexural areas of trunk and extremities. Skin punch biopsy was done and histopathology was consistent with subcorneal pustular dermatosis/SWD. She was started on Dapsone but after two weeks of intake, the patient developed generalized erythematous desquamating plaques on the trunk and extremities, with palmoplantar involvement. The patient did not have fever, jaundice, lymphadenopathy, and abdominal tenderness. Laboratory investigation such as complete blood count and liver function tests were normal. The final diagnosis was SWD with hypersensitivity to Dapsone. Dapsone was immediately discontinued and she was shifted to oral colchicine. After six weeks of oral colchicine therapy, the lesions have completely resolved. Patient was in remission for six months thereafter. Conclusion SWD is rare and the drug of choice is dapsone. In instances where dapsone is not suitable, oral colchicine can be an ideal alternative treatment.
Skin Diseases, Vesiculobullous ; Dapsone ; Colchicine

Granuloma annulare is a benign granulomatous skin disease, clinically characterized by dermal papules tending to form annular shapes. Granuloma annulare is classified into localized, generalized, subcutaneous, and perforating types. Localized granuloma annulare is likely to resolve spontaneously, while generalized granuloma annulare usually takes a chronic course. Topical steroids, phototherapy, isotretinoin, dapsone, hydroxychloroquine, and other various treatments have been proposed, but some cases have been resistant to all of those treatment modalities. We experienced 3 cases of generalized granuloma annulare demonstrating a recalcitrant course that were successfully treated with methotrexate and propose that methotrexate may be an effective option for recalcitrant generalized granuloma annulare treatment.
Dapsone ; Granuloma Annulare* ; Granuloma* ; Hydroxychloroquine ; Isotretinoin ; Methotrexate* ; Phototherapy ; Skin Diseases ; Steroids

Dapsone, an antibiotic, has been used to cure leprosy. It has been reported that dapsone has anti-inflammatory activity in hosts; however, the anti-inflammatory mechanism of dapsone has not been fully elucidated. The present study investigated the anti-inflammatory effects of dapsone on bone marrow cells (BMs), especially upon exposure to lipopolysaccharide (LPS). We treated BMs with LPS and dapsone, and the treated cells underwent cellular activity assay, flow cytometry analysis, cytokine production assessment, and reactive oxygen species assay. LPS distinctly activated BMs with several characteristics including high cellular activity, granulocyte changes, and tumor necrosis factor alpha (TNF-α) production increases. Interestingly, dapsone modulated the inflammatory cells, including granulocytes in LPS-treated BMs, by inducing cell death. While the percentage of Gr-1 positive cells was 57% in control cells, LPS increased that to 75%, and LPS plus dapsone decreased it to 64%. Furthermore, dapsone decreased the mitochondrial membrane potential of LPS-treated BMs. At a low concentration (25 µg/mL), dapsone significantly decreased the production of TNF-α in LPS-treated BMs by 54%. This study confirmed that dapsone has anti-inflammatory effects on LPS-mediated inflammation via modulation of the number and function of inflammatory cells, providing new and useful information for clinicians and researchers.
Bone Marrow Cells ; Bone Marrow ; Cell Death ; Dapsone ; Flow Cytometry ; Granulocytes ; Inflammation ; Leprosy ; Membrane Potential, Mitochondrial ; Necrosis ; Reactive Oxygen Species ; Tumor Necrosis Factor-alpha

Patients with chronic lymphocytic leukemia (CLL) rarely exhibit an exaggerated insect bite-like reaction without a history of an arthropod bite. We report a case of an insect bite-like reaction in a 74-year old man with CLL. The patient presented with a 2-year history of recurrent itchy erythematous patches and blisters on the whole body. He had been diagnosed with CLL 2 years ago, and the skin lesions developed 1 month after remission. The result of a skin biopsy was consistent with insect bite. Immunohistochemical staining of the infiltrated cells showed positive reactions for CD3, CD5 and negative for CD20, CD23. Direct and indirect immunofluorescence revealed negative results. The patient was treated with oral prednisolone and dapsone, under the diagnosis of CLL-associated insect bite-like reaction, and showed marked improvement. Dermatologist should be aware of insect bite-like reaction associated with CLL as a distinct disease entity that is similar to insect bite or bullous pemphigoid.
Arthropods ; Biopsy ; Blister* ; Dapsone ; Diagnosis ; Fluorescent Antibody Technique, Indirect ; Humans ; Insect Bites and Stings ; Insects* ; Leukemia, Lymphocytic, Chronic, B-Cell* ; Pemphigoid, Bullous* ; Prednisolone ; Skin