Introduction
Drug provocation tests are gold standard to confirm or exclude drug allergy. Few studies have specifically investigated patients’ adherence after a negative test and the determinants of their level of trust in the procedure. We aimed to assess both the trust level and the intention to resume the reintroduced drugs in adult patients who had completed a full allergology workup, including a negative drug provocation test.
Methods
This retrospective, cross-sectional, observational, descriptive, and analytical study was conducted in the Allergy unit of Le Mans hospital between April and July 2025. It included 305 drug provocation tests with negative outcomes performed in 230 patients reintroduced between 2017 and 2021.
Results
A total of 64.3% of surveyed patients reported a satisfactory trust level (at least 7/10) in the drug provocation tests for a future resumption of the drug. Among our patients, 35.4 % had already resumed the treatment after reintroduction. The mean trust score was 7.02/10, rising to 8.90/10 among “confident” patients who were willing to resume the drug at home. The reintroduction of a corticosteroid or the presence of polyallergy in the patient's record appeared to be the two main factors of reluctance to resume treatment. Forty-four percent of patients did not recall having a written record of the drug provocation test outcome.
Conclusion
We found post-drug provocation test adherence to be consistent with the literature. A specific focus on patients at high risk of non-adherence could improve their level of treatment resumption. Providing a document confirming the absence of allergy, or adding a “drug tested and reintroduced” note to the patient's digital health record, appear to be promising approaches to counter forgetting and/or misreporting to healthcare professionals managing the patient in the future.
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