JOURNAL ARTICLE

Association of non-immediate drug hypersensitivity with drug exposure: A case control analysis of spontaneous reports from a Tunisian pharmacovigilance database

Amel Chaabane, Najeh Ben Fadhel, Zohra Chadli, Haifa Ben Romdhane, Nadia Ben Fredj, Naceur A Boughattas, Karim Aouam
European Journal of Internal Medicine 2018, 53: 40-44
29409745

PURPOSE: To assess delayed-type cutaneous reactions (DTCRs) related to drugs, using a case-control approach to qualify drug risks.

METHODS: The study used the Tunisian pharmacovigilance database of Monastir. The association between drugs and DTCRs was assessed using a case/non-case method. Drugs were grouped according to the ATC Classification System. Patients were defined as "cases" if they have developed DTCRs regardless of the causality assessment. All other reports were "non-cases". Association between reactions and drugs was calculated using the reporting odds ratio (ROR) with 95% confidence intervals (CIs). A p value < 0.05 was considered significant.

RESULTS: The analysis was carried out on 1798 reports, of which 867 concerned DTCRs (cases) and 931 concerned non-cases. The calculated risk estimates were significant for cefotaxime (ROR 2.1; 95% CI 1.5 to 3), pristinamycin (ROR 4; 95% CI 2 to 7.9), sulfamethoxazole (ROR 4.4; 95% CI 1.6 to 11.7), oxacillin (ROR 2.2; 95% CI 1.2 to 3.8), doxycycline (ROR 10.8; 95% CI 1.4 to 84.9), carbamazepine (ROR 3.3; 95% CI 1.7 to 6.2), phenobarbital (ROR 2.3; 95% CI 1.03 to 5.1), allopurinol (ROR 3.6; 95% CI 1.8 to 7.2), furosemide (ROR 2.4; 95% CI 1.3 to 6.3), hydrochlorothiazide(ROR 2.9; 95% CI 1.3 to 6.3) and candesartan (ROR 4.7; 95% CI 1.3 to 16.6).

CONCLUSION: Our findings corroborate risks for a number of drugs, such as antibacterials, antiepileptics and allopurinol in inducing DTCRs. Given the widespread use of these drug classes, awareness should be raised among patients and prescribers about these risks.

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