# A Case of Acute Eosinophilic Pneumonia Associated With Non-steroidal Anti-inflammatory Drugs

## TL;DR

A patient developed acute eosinophilic pneumonia after taking NSAIDs, which improved after stopping the drugs.

## Contribution

Reports a rare case of NSAID-induced acute eosinophilic pneumonia and highlights the importance of identifying the causative agent.

## Key findings

- The patient showed symptoms and lab findings consistent with acute eosinophilic pneumonia after NSAID use.
- Drug-induced AEP was diagnosed after ruling out other causes and the patient improved after drug discontinuation.

## Abstract

Non-steroidal anti-inflammatory drugs (NSAIDs) are widely used and their gastric, cardiovascular, and renal adverse effects have been well documented. Although rare, NSAID-induced acute eosinophilic pneumonia (AEP) may occur. We report a case of AEP related to naproxen and celecoxib. The patient presented with dry cough and breathlessness two weeks after she started taking these drugs. The chest radiograph displayed bilateral opacities and she had peripheral eosinophilia. Bronchoalveolar lavage was performed at a time when blood eosinophilia was already decreasing and cell analysis revealed 63700 cells/mL with 9% eosinophil. After ruling out other possible etiologies, drug-induced AEP was diagnosed. The patient improved after drug discontinuation. When it comes to drug-induced AEP identifying a causative agent is essential as cessation of the drug is the mainstay of the treatment.