Fixed drug eruption to sitagliptin
© Gupta and Gupta; licensee BioMed Central. 2015
Received: 18 January 2015
Accepted: 7 March 2015
Published: 25 March 2015
Fixed drug eruption is a common adverse effect seen with various drugs notably antibiotics, antiepileptics and non-steroidal anti-inflammatory drugs. Herein we report a case of Sitagliptin induced fixed drug eruption in a 46 year old female who developed circumscribed, erythematous macules all over the body within one week of initiation of Sitagliptin. The lesions resolved with residual hyperpigmentation on cessation of the drug. The diagnosis was confirmed by an oral provocation test which led to a reactivation of the lesions. To the best of our knowledge, this is the first case of fixed drug eruption to Sitagliptin reported in the literature.
KeywordsSitagliptin Fixed drug eruption Oral provocation test
Fixed drug eruption (FDE) is a common cutaneous adverse effect seen with a wide array of drugs like antimicrobials, antiepileptics and non-steroidal anti-inflammatory drugs. FDE is characterized by well circumscribed, erythematous muco-cutaneous macules that can at times develop as early as 30 minutes after exposure to the causative drug, healing with residual hyperpigmentation and recurring at the same site upon subsequent exposure to the same drug. Sitagliptin is a novel antihyperglycemic agent belonging to the class of dipeptidyl peptidase IV inhibitors, which is used as a second line drug for the management of type II diabetes mellitus . Herein we report a case of FDE due to Sitagliptin in a 46 year old female which, to the best of our knowledge, is the first case to be reported in the literature.
Sitagliptin is a newly developed oral hypoglycemic drug for the management of type II diabetes mellitus belonging to the class of dipeptidyl peptidase (DPP)-IV inhibitors, approved by the US Food and Drug Administration in 2006. Apart from systemic adverse effects like hypoglycemia, gastrointestinal effects, pancreatitis, respiratory side effects like nasopharyngitis and upper respiratory tract infections, Sitagliptin has been reported to induce a wide array of cutaneous adverse effects including psoriasiform eruption, maculopapular rash, Stevens Johnson syndrome, toxic epidermal necrolysis, anaphylaxis, cutaneous vasculitis, bullous pemphigoid, photosensitivity and angioedema on co-administration with ACE inhibitors [1,4-7]. A thorough search of literature could not reveal any case of FDE due to Sitagliptin till date.
FDE is a type of delayed hypersensitivity reaction mediated by CD8+ T-cells in which the causative drug acts as a hapten, which induces sensitization and development of sensitized CD8+ T-cells, which get activated on re-exposure to the offending drug . Although clinical history remains the mainstay of diagnosis, patch tests and drug challenge tests are also helpful and can be used for a more objective diagnostic approach. Patch tests have been found useful in the diagnosis of FDE especially when applied at the previously affected sites. Drug challenge test are the most accurate diagnostic tool for the diagnosis of FDE which can be performed either by starting with a low dose of suspected drug followed by gradual escalation or by starting with the full therapeutic dose at once. A lymphocyte transformation test is a laboratory test for the diagnosis of delayed drug hypersensitivity especially maculopapular drug rash, but have been found useful in FDE also . These tests are of importance, both for the confirmation of diagnosis as well as for the identification of causative drug. Discontinuation of the offending drug forms the mainstay of treatment and may be the only treatment required for mild cases but severe cases may require topical and systemic corticosteroids and antihistamines. Patient education and counseling regarding the avoidance of the offending drug or its derivatives to prevent recurrences constitute an important aspect of management.
In conclusion, Sitagliptin is a new drug commonly being used for the management of type II diabetes mellitus; henceforth adverse effects caused by it are still not fully known. Cutaneous adverse effects have been reported with Sitagliptin but this is the first case of FDE reported with it. The healthcare providers should be fully aware of the various adverse effects of the drug in order to prevent recurrences and for rapid diagnosis and proper management of the same.
Written informed consent was obtained from the patient for publication of this Case report.
We gratefully thank the patient and her family for consenting to publication of this study.
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