In a 24-year-old man presenting with odynophagia and retrosternal chest pain, without fever, sore throat, or neck pain, who has been taking ibuprofen 800 mg three times daily for a week for ankle pain, what is the most likely diagnosis?

Pill-Induced Esophagitis from NSAIDs

The most likely diagnosis is pill-induced esophagitis (PIO) secondary to ibuprofen use. This young man's presentation of odynophagia (painful swallowing) and retrosternal pain after one week of high-dose ibuprofen (800 mg three times daily) without fever, sore throat, or neck pain is classic for NSAID-induced esophageal injury.

Clinical Reasoning

The diagnosis is strongly supported by multiple converging factors:

Drug Label Evidence

NSAIDs like ibuprofen are well-documented causes of esophageal injury. The FDA labeling explicitly warns that ibuprofen can cause serious GI side effects including ulcers, with patients needing to be alert for symptoms such as epigastric pain and dyspepsia 1. While the label focuses primarily on gastric complications, esophageal injury follows the same pathophysiologic mechanism of direct mucosal contact damage.

Characteristic Clinical Features

• Odynophagia (painful swallowing) is the hallmark symptom of PIO, present in 38.5% of cases 2
• Retrosternal chest pain occurs in 71.8% of drug-induced esophagitis cases 2
• The absence of fever, sore throat, and neck pain effectively rules out infectious causes (pharyngitis, tonsillitis) and other inflammatory conditions
• "Pinpoint localized odynophagia" (PLO) is a highly specific symptom for PIO and correlates with kissing ulcers on endoscopy 3

Medication History

The patient's ibuprofen regimen (800 mg TID = 2400 mg daily) represents a high therapeutic dose. Research demonstrates that ibuprofen is one of the main causative agents for drug-induced esophagitis, alongside antibiotics 2. Multiple case reports document esophageal ulcers, bleeding, and even perforation from ibuprofen specifically 4, 5, 6.

Risk Factors Present

Two critical risk factors are likely operative here:

• Taking pills with insufficient water (less than 100 mL is a significant risk factor) 3
• Taking medication shortly before lying down (within 10 minutes of sleep increases risk) 3

Expected Endoscopic Findings

If endoscopy were performed, you would expect to find:

• Kissing ulcers (present in 43.6-91.3% of PIO cases) - these are characteristic mirror-image ulcers on opposing esophageal walls 3, 2
• Location in the middle third of the esophagus (78.2% of cases), near the aortic arch where pills naturally lodge 2, 5
• Large, shallow, discrete ulcers with normal surrounding mucosa 5
• Possible erosions, ulcers with bleeding, or coating with drug material 2

Management Approach

Immediate actions:

1. Discontinue ibuprofen immediately - this is the most critical intervention
2. Initiate proton pump inhibitor (PPI) therapy - all patients in the literature were successfully treated with PPIs or sucralfate 2
3. Consider sucralfate as adjunctive therapy for mucosal protection
4. Provide alternative analgesia for ankle pain (acetaminophen, topical NSAIDs, or other non-oral options)

Patient counseling on pill-taking technique:

• Take all medications with at least 200 mL (full glass) of water
• Remain upright for at least 30 minutes after taking pills
• Never take pills immediately before bed
• Consider liquid formulations if available

Follow-up considerations:

• Endoscopy is indicated if symptoms persist beyond 7-10 days, worsen, or if dysphagia develops (suggesting stricture formation)
• Most cases heal completely within 3-4 weeks with appropriate treatment 5
• Endoscopic follow-up in treated cases shows normal findings, scars, or healing ulcers 2

Important Caveats

Red flags requiring urgent endoscopy:

• Hematemesis or melena (indicating bleeding ulcers, seen in 24.4% of cases) 2
• Progressive dysphagia (suggesting stricture formation, which can occur even from a single tablet) 6
• Inability to swallow secretions
• Signs of perforation (fever, severe pain, subcutaneous emphysema) - though rare, ibuprofen-induced perforation has been reported 4

Alternative diagnoses to briefly consider but are less likely:

• Infectious esophagitis (would expect fever, immunocompromised state) 7
• Eosinophilic esophagitis (chronic dysphagia, food impaction history) 8
• Cardiac causes (but troponin would be needed, and pain pattern doesn't fit) 9

The temporal relationship between starting high-dose ibuprofen and symptom onset, combined with the characteristic symptom pattern and absence of infectious signs, makes pill-induced esophagitis the clear diagnosis.