Drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome is a rare but severe drug reaction, most commonly to aromatic anticonvulsants with a delayed onset, variable clinical presentation and protracted course. The exact incidence of DRESS syndrome is not known because of the variability in clinical presentation, lack of strict diagnostic criteria and universally accepted nomenclature. We report four cases of DRESS syndrome associated with the use of carbamazepine. The clinical manifestation was similar: a maculopapular eruption progressing to exfoliative erythroderma, fever, and lymphadenopathy. Leukocytosis, atypical lymphocytes and liver injury (in 2 patients) were also observed. Assessment of causality using the Naranjo algorithm established a "probable" relationship with carbamazepine in three of the cases and a "possible" relationship in one case. Detection of DRESS syndrome is dependent on the exclusion of a variety of diseases with similar manifestations and may be delayed in time. DRESS syndrome is a potentially life-threatening multisystem adverse drug reaction, and accidental reexposure or drug provocation tests must be avoided.
The objective of this study was to evaluate the clinical pattern and risk factors for adverse drug reactions (ADRs) in patients hospitalized in a specialized dermatology department. A prospective study was conducted in the Clinic of Dermatology and Venereology in Stara Zagora for a 5-year period. ADRs were classified by type, severity and causality. Case-causality was scored according to Naranjo et al. (1981). A total of 1041 admissions were analyzed. ADRs occurred in 147 patients. Cutaneous reactions represented the most common ADRs followed by endocrine/metabolic, cardiovascular and gastrointestinal disorders. The prevalent clinical patterns of cutaneous ADRs were exanthematous and urticarial. ADRs were almost evenly distributed as type A and type B reactions. Drug classes most frequently responsible for ADRs were glucocorticosteroids (GLCs) and antiinfective agents. The factors significantly associated with ADRs were the use of GLCs (OR 11.11; 95% CI 6.69-18.43), antiinfective agents (OR 1.48; 95% CI 1.04-2.11) and older age. Patients hospitalized in a dermatology department may develop ADRs with multiorgan clinical presentation. The most important risk factors for ADRs in this sample of patients were the use of GLCs, antiinfective agents and older age. The study establishes a specific ADR risk profile of patients with dermatological disorders in a hospital setting.
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