• William Manning and Benjamin S Roth.
• Department of Emergency Medicine, Prisma Health-Upstate, Greenville Memorial Hospital, Greenville, South Carolina.
• J Emerg Med. 2020 Jun 1; 58 (6): e247-e249.

BackgroundDiltiazem in its extended-release formulation is widely prescribed and is generally well-tolerated. Currently, there are no published case reports of localized inflammation related to extended-release diltiazem causing either significant pill esophagitis or airway inflammation when swallowed incompletely.Case ReportWe present a case of an 85-year-old female who reported difficulty swallowing roughly 18 h after incomplete ingestion of an extended-release diltiazem tablet. She had mild stridor and visible right-sided neck swelling on examination. Imaging revealed a large inflammatory mass, which was believed to be a subacute to chronic neoplastic process when reviewed both by radiology and otolaryngology. Two days after presentation, however, the patient's symptoms and the inflammatory mass had resolved entirely. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: Extended-release diltiazem can cause an inflammatory mass when ingested incompletely, leading to possible acute airway compromise. Any invasive airway intervention should be approached with caution, given the degree of acute inflammation. Even in patients who do not require intervention, close observation until clinical improvement is warranted in symptomatic patients with a history of recent incomplete ingestion of extended-release diltiazem.Copyright © 2020 Elsevier Inc. All rights reserved.

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