The World Allergy Organization journal · 2026
Vitamin B12 desensitization and provocation: Ten-year clinical experience.
СтатьяНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Dindar Çelik Fatma, Aksu Kurtuluş, Göktürk Özge, Karahan Yavuz, Baştuğ İnan Nur Betül, Uslu Barış, Demir Şenay, Çelik Enes
Аннотация
BACKGROUND: Vitamin B12 is an essential micronutrient and hypersensitivity reactions (HSR) are considered rare.
OBJECTIVE: To present the characteristics of HSRs to vitamin B12 preparations and to report the outcomes of desensitization and drug provocation tests (DPT) for vitamin B12.
METHODS: The retrospective descriptive study included patients who required treatment for vitamin B12 deficiency and were hypersensitive to vitamin B12 or hesitant to use it due to other drug allergies. Low-risk patients based on their index reaction and patients hesitant to use vitamin B12 underwent DPT, while desensitization protocols were performed for patients classified as high-risk. Successful completion defined as the execution of all steps in the desensitization and DPT protocols without any subsequent immediate or delayed reactions.
RESULTS: Among the 44 patients, 28 patients (63.6%) had a history of HSRs following the use of cyanocobalamin. The remaining 16 patients (36.4%) had no prior history of HSR to vitamin B12-containing drugs but were hesitant to use vitamin B12 due to other drug allergies. DPT was performed in 38 patients (86.4%), while desensitization was performed in 6 patients (13.6%). The mean age was 46.34 ± 14.50 years and 32 (72.7%) of them were female. Skin prick tests (SPT) and immediate reading intradermal tests (IDTs) were administered in 20 patients (45.5%). Patch tests were conducted in 8 patients (18.1%) and delayed reading IDTs were performed in 3 (6.8%). All skin test results were negative. A total of 40 challenges were conducted and an immediate-type HSR was observed in 1 challenge (2.5%). Desensitization was performed in 8 cycle and HSR occurred in 1 (12.5%) cycle.
CONCLUSION: DPT is a reliable procedure that provides the assessment of low-risk patients with vitamin B12 hypersensitivity and prevents unnecessary drug restrictions. Additionally, desensitization protocols enable the continuation of vitamin B12 treatment in high-risk patients.
OBJECTIVE: To present the characteristics of HSRs to vitamin B12 preparations and to report the outcomes of desensitization and drug provocation tests (DPT) for vitamin B12.
METHODS: The retrospective descriptive study included patients who required treatment for vitamin B12 deficiency and were hypersensitive to vitamin B12 or hesitant to use it due to other drug allergies. Low-risk patients based on their index reaction and patients hesitant to use vitamin B12 underwent DPT, while desensitization protocols were performed for patients classified as high-risk. Successful completion defined as the execution of all steps in the desensitization and DPT protocols without any subsequent immediate or delayed reactions.
RESULTS: Among the 44 patients, 28 patients (63.6%) had a history of HSRs following the use of cyanocobalamin. The remaining 16 patients (36.4%) had no prior history of HSR to vitamin B12-containing drugs but were hesitant to use vitamin B12 due to other drug allergies. DPT was performed in 38 patients (86.4%), while desensitization was performed in 6 patients (13.6%). The mean age was 46.34 ± 14.50 years and 32 (72.7%) of them were female. Skin prick tests (SPT) and immediate reading intradermal tests (IDTs) were administered in 20 patients (45.5%). Patch tests were conducted in 8 patients (18.1%) and delayed reading IDTs were performed in 3 (6.8%). All skin test results were negative. A total of 40 challenges were conducted and an immediate-type HSR was observed in 1 challenge (2.5%). Desensitization was performed in 8 cycle and HSR occurred in 1 (12.5%) cycle.
CONCLUSION: DPT is a reliable procedure that provides the assessment of low-risk patients with vitamin B12 hypersensitivity and prevents unnecessary drug restrictions. Additionally, desensitization protocols enable the continuation of vitamin B12 treatment in high-risk patients.