BACKGROUND Corticosteroid sparing is required in 15% to 40% of adults with persistent or chronic primary immune thrombocytopenic purpura (ITP). Herein, the efficacy of immunomodulatory drugs (dapsone, interferon alpha, danazol, and hydroxychloroquine as second-third-line therapies in ITP is investigated. METHODS MEDLINE was searched for studies that included patients with persistent or chroni...

Intraoperative cyanosis is most commonly caused by hypoxaemia. The anaesthetist is required to perform a rapid series of diagnostic manoeuvres and take remedial action. Occasionally methaemoglobin, sulfhaemoglobin, or haemoglobin M, undetected preoperatively, is the cause of the cyanosis. We report a case of methaemoglobinaemia secondary to dapsone ingestion that was diagnosed intraoperatively....

Methemoglobinemia is a life-threatening condition that can be difficult to diagnose. While methemoglobinemia can be congenital and should be considered in cyanotic infants,1 it is more often an adverse medication effect, most commonly related to dapsone use.2 As up to 1 in 9 emergency department visits in Canada might be owing to adverse medication effects, physicians and other health care prov...

Corrosion inhibition of mild steel in 1 M HCl and 0.5 M H2SO4 by dapsone were studied by polarization resistance, Tafel polarization, electrochemical impedance spectroscopy (EIS) and weight loss measurement. Results obtained revealed that inhibition occurs through adsorption of the drug on metal surface without modifying the mechanism of corrosion process. Potentiodynamic polarization suggested...

A 35-year-old female with borderline lepromatous (BL) leprosy who suffered from dapsone-induced erythroderma is reported. Sudden onset of erythroderma gave rise to a temporary arrest of the function of nail matrix with the resultant Beau's lines. She rapidly recovered with omission of dapsone and therapy with systemic corticosteroids and a topical emollient. In view of the potentially fatal hyp...

Two groups, each of 1 00 patients suffering from tuberculoid leprosy, were treated with different dosages of dapsone, the control group being given a conservative dosage of the drug and the study group a high dosage ( 1 200 mg weekly) . The patients in the high-dosage group showed more rapid regression of the disease , a lower incidence of relapse and early regression of the tingling, enlargeme...

Dapsone syndrome is a potentially fatal hypersensitivity reaction to sulphone. We report a 12-year-old girl who developed high grade fever associated with intense jaundice, exfoliative skin rash and hepatomegaly after five weeks of starting the multidrug regimen for the treatment of Hansen's disease. Laboratory investigations revealed presence of leucocytosis with eosinophilia, deranged liver e...

Dapsone 5% gel for the topical treatment for acne vulgaris was recently introduced in Canada. It represents the first new anti-acne agent to gain North American regulatory approval in the past decade. Dapsone's utility is attributable to its anti-inflammatory and antimicrobial properties that improve both inflammatory and non-inflammatory acne, with more prominent effects occurring in inflammat...