Amoxicillin-clavulanate induced DRESS syndrome masquerading as red man syndrome.

Drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome is a severe drug-induced hypersensitivity reaction carrying a mortality rate of up to 10%. We present a rare case of DRESS syndrome induced by amoxicillin-clavulanate, initially masquerading as red man syndrome. A 32-year-old male was admitted with flu-like symptoms and a maculopapular rash on the trunk and face that was exacerbated with vancomycin infusion, concerning for red man syndrome. He was receiving systemic antibiotics (vancomycin, ceftriaxone, and metronidazole) for infective endocarditis and previously took amoxicillin-clavulanate for a dental abscess. Despite the discontinuation of vancomycin, the exanthem continued to worsen, extending to involve >50% of his body surface area. Eosinophilia, hepatosplenomegaly, and acute kidney and liver injuries prompted consideration of DRESS syndrome. All antibiotics were discontinued, and systemic glucocorticoids were initiated. Punch biopsy revealed interface dermatitis with eosinophilic infiltrates; a high RegiSCAR score confirmed the diagnosis of DRESS. Amoxicillin-clavulanate was flagged as a severe allergy and deemed the culprit owing to the timing of exposure and personal/family history of hypersensitivity.

Uninterrupted versus interrupted direct oral anticoagulation for catheter ablation of atrial fibrillation: A systematic review and meta-analysis.

INTRODUCTION: To evaluate the safety of uninterrupted versus interrupted direct oral anticoagulation (DOAC) for patients undergoing catheter ablation (CA) of atrial fibrillation (AF). METHODS: We conducted a systematic search of MEDLINE and EMBASE for randomized controlled trials (RCT) and observational studies comparing uninterrupted versus interrupted DOAC for patients undergoing CA of AF. Primary outcome was major bleeding. Secondary outcomes included minor bleeding, stroke or transient ischemic attack (TIA) or thromboembolism (TE), silent cerebral ischemic events, and cardiac tamponade. Meta-analysis was stratified by study design. Risk ratios (RR) with 95% confidence intervals were calculated using random effects model and Mantel-Haenszel method was used to pool RR. RESULTS: A total of 13 studies (7 randomized, 6 observational) comprising 3595 patients were included. The RCT restricted analysis did not show any difference in terms of major bleeding (risk ratio [RR] = 0.79; [0.35-1.79]), minor bleeding (RR = 0.99 [0.68-1.43]), stroke or TIA or TE (RR = 0.80 [0.19-3.32]), silent cerebral ischemic events (RR = 0.64 [0.32-1.28]), and cardiac tamponade (RR = 0.61 [0.20-1.92]). Observational study restricted analysis showed a protective effect of uninterrupted DOAC on silent cerebral ischemic events (RR = 0.45 [0.31-0.67]) and no difference in other outcomes. CONCLUSIONS: There is no difference in bleeding and thromboembolic outcomes with uninterrupted versus interrupted DOAC for CA of AF and observational data suggests that uninterrupted DOACs are protective against silent cerebral ischemic lesions.