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De Vuono A, Palleria C, Scicchitano F, Squillace A, De Sarro G, Gallelli L. Skin rash during treatment with generic itraconazole. J Pharmacol Pharmacother 2014; 5:158-60. [PMID: 24799820 PMCID: PMC4008915 DOI: 10.4103/0976-500x.130086] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 06/04/2013] [Accepted: 07/12/2013] [Indexed: 11/16/2022] Open
Abstract
Generic drugs have the same active substance, the same pharmaceutical form, the same therapeutic indications and a similar bioequivalence with the reference medicinal product (branded). Although a similar efficacy is postulated, some cases of clinical inefficacy during treatment with generic formulations have been reported. In this case, we describe a woman with onychomycosis that developed a skin rash during treatment with a generic formulation of itraconazole. Drug administration and its re-challenge confirmed the association between itraconazole and skin rash. Both Naranjo probability scale and World Health Organization causality assessment scale documented a probable association between generic-itraconazole and skin rash. The switch from generic formulation to brand one induced an improvement of symptoms. Since we are unable to evaluate the role of each excipient in the development of skin rash, we cannot rule out their involvement. However, more data are necessary to better define the similarities or differences between branded and generic formulations.
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Affiliation(s)
- Antonio De Vuono
- Department of General Medicine, Cosenza, University of Catanzaro, Italy ; Department of Health Science, Regional Center on drug information, Mater Domini University Hospital, Italy
| | - Caterina Palleria
- Department of Health Science, Regional Center on drug information, Mater Domini University Hospital, Italy ; Department of Chair of Pharmacology, School of Medicine, University of Catanzaro, Italy
| | - Francesca Scicchitano
- Department of Health Science, Regional Center on drug information, Mater Domini University Hospital, Italy ; Department of Chair of Pharmacology, School of Medicine, University of Catanzaro, Italy
| | - Aida Squillace
- Department of Health Science, Regional Center on drug information, Mater Domini University Hospital, Italy ; Department of Chair of Pharmacology, School of Medicine, University of Catanzaro, Italy
| | - Giovambattista De Sarro
- Department of Health Science, Regional Center on drug information, Mater Domini University Hospital, Italy ; Department of Chair of Pharmacology, School of Medicine, University of Catanzaro, Italy
| | - Luca Gallelli
- Department of Health Science, Regional Center on drug information, Mater Domini University Hospital, Italy ; Department of Chair of Pharmacology, School of Medicine, University of Catanzaro, Italy
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