A 23-year-old woman presents to her primary care physician with severe pain when swallowing that began 2 days ago. She reports a burning sensation in the middle of her chest and discomfort with both liquids and solids. Three days ago, she was prescribed doxycycline for acne vulgaris. She states that she usually takes her medication immediately before going to bed with “just a sip of water.” She denies fever, weight loss, chronic heartburn, or prior swallowing difficulties. Temperature is 36.8°C (98.2°F), blood pressure is 116/72 mm Hg, pulse is 72/min, and respiratory rate is 14/min. Physical examination is unremarkable.
Which of the following is the most likely diagnosis?
The correct answer is:
E) Pill esophagitis
This patient has pill esophagitis, also known as medication-induced esophagitis. The diagnosis is suggested by the abrupt onset of odynophagia and retrosternal chest pain shortly after starting doxycycline, one of the medications most commonly implicated in this condition. The history that she takes the medication immediately before lying down with minimal water is the critical clue.
Pill esophagitis occurs when a medication remains in prolonged contact with the esophageal mucosa, causing local irritation and ulceration. This most commonly occurs when pills are taken with insufficient water or immediately before recumbency. The mid-esophagus is particularly vulnerable because it is compressed externally by structures such as the aortic arch and left atrium, creating areas where pills may become transiently lodged.
Several medications are classically associated with pill esophagitis, including doxycycline, other tetracyclines, bisphosphonates, potassium chloride, iron supplements, and nonsteroidal anti-inflammatory drugs. Patients typically present with sudden-onset odynophagia, retrosternal pain, and dysphagia developing days after exposure.
Management involves discontinuing the offending medication when possible, providing symptomatic treatment, and counseling patients to take pills with a full glass of water and remain upright for at least 30 minutes afterward. Most cases resolve without long-term complications.
Answer choice A: Achalasia, is incorrect.
Achalasia causes progressive dysphagia to both solids and liquids due to impaired relaxation of the lower esophageal sphincter. Symptoms generally develop gradually rather than acutely over several days after medication exposure.
Answer choice B: Eosinophilic esophagitis, is incorrect.
Eosinophilic esophagitis typically presents with chronic solid-food dysphagia and food impaction, often in patients with atopic disease. The abrupt onset after starting doxycycline is more consistent with pill esophagitis.
Answer choice C: Esophageal adenocarcinoma, is incorrect.
Esophageal adenocarcinoma usually presents with progressive dysphagia and weight loss in older adults with longstanding gastroesophageal reflux disease. It would not cause sudden odynophagia in a healthy young patient.
Answer choice D: Gastroesophageal reflux disease, is incorrect.
GERD commonly causes heartburn and regurgitation. Although esophagitis may occur, the temporal relationship to doxycycline use and the prominent odynophagia strongly favor pill esophagitis.
Key Learning Point
Pill esophagitis commonly occurs after taking medications such as doxycycline, bisphosphonates, potassium chloride, or NSAIDs with insufficient water or immediately before lying down. Patients typically present with acute odynophagia and retrosternal chest pain.
