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OBJECTIVE: The study aims to describe drug shortages affecting lead chelators in the United States from 2001 through 2022. METHODS: Drug shortage data were retrieved from the University of Utah Drug Information Service from January 1, 2001, through December 31, 2022. Shortages of first- and second-line lead chelators were analyzed. Drug class, formulation, administration route, shortage reason, shortage duration, generic status, single-source status, and presence of temporally overlapping shortages were examined. Total shortage months, percentages of study period on shortage, and median shortage durations were calculated. RESULTS: Thirteen lead chelator shortages were reported during the study period. Median duration was 7.4 months and the longest shortage (24.8 months) involved calcium disodium edetate. Calcium disodium edetate and dimercaprol had the greatest number of shortages, 4 each, and 61.5% of shortages involved parenteral medications. Median shortage duration was 14.2 months for parenteral agents and 2.2 months for non-parenteral agents. All shortages involved generic, single-source products. Supply/demand and manufacturing problems were the most common shortage reasons provided. Overlapping shortages occurred for 3.7% of the study period. Median shortage duration increased from 3 to 11 months in the second half of the study period, and 61.5% of shortages occurred in the second half of the study period. CONCLUSIONS: All chelators experienced multiple shortages, which became increasingly frequent and prolonged over time. Concurrent shortages occurred, potentially hampering substitution between different agents. Health care stakeholders must build supply chain resilience and develop guidelines regarding how to modify chelation therapy based on shortage conditions.
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INTRODUCTION: Antimuscarinic delirium (AD), a potentially life-threatening condition frequently encountered by emergency physicians, results from poisoning with antimuscarinic agents. Treatment with physostigmine and benzodiazepines is the mainstay of pharmacotherapy, and use of dexmedetomidine and non-physostigmine centrally-acting acetylcholinesterase inhibitors (cAChEi) such as rivastigmine has also been described. Unfortunately, these medications are subject to drug shortages which negatively impact the ability to provide appropriate pharmacologic treatment of patients with AD. METHODS: Drug shortage data were retrieved from the University of Utah Drug Information Service (UUDIS) database from January 2001 through December 2021. Shortages of first-line agents used to treat AD (physostigmine and parenteral benzodiazepines) and second-line agents (dexmedetomidine and non-physostigmine cAChEi) were examined. Drug class, formulation, route of administration, reason for shortage, shortage duration, generic status, and whether the drug was a single-source product (made by only one manufacturer) were extracted. Shortage overlap and median shortage durations were calculated. RESULTS: Twenty-six shortages impacting drugs used to treat AD were reported to UUDIS from January 1, 2001 to December 31, 2021. Median shortage duration for all medication classes was 6.0 months. Four shortages were unresolved at the end of the study period. The single medication most often on shortage was dexmedetomidine, however benzodiazepines were the most common medication class on shortage. Twenty-five shortages involved parenteral formulations, and one shortage involved the transdermal patch formulation of rivastigmine. The majority (88.5%) of shortages involved generic medications, and 50% of products on shortage were single-source. The most common reported reason for shortage was a manufacturing issue (27%). Shortages were often prolonged and, in 92% of cases, overlapped temporally with other shortages. Shortage frequency and duration increased during the second half of the study period. CONCLUSION: Shortages of agents used in the treatment of AD were common during the study period and affected all agent classes. Shortages were often prolonged and multiple shortages were ongoing at study period end. Multiple concurrent shortages involving different agents occurred, which could hamper substitution as a means of mitigating shortage. Healthcare stakeholders must develop innovative patient- and institution-specific solutions in times of shortage and work to build resilience into the medical product supply chain to minimize future shortages of drugs used for treatment of AD.
