In a 55-year-old man with chronic gastroesophageal reflux disease, persistent heartburn despite two months of over-the-counter proton-pump inhibitor therapy, no dysphagia, odynophagia, bloating, or weight loss, a 20-pack-year smoking history (quit five years ago), obesity (BMI 32) and normal vital signs, what is the most appropriate next step in evaluation?

Most Appropriate Next Step: Increase PPI to Twice Daily

The most appropriate next step is to optimize PPI therapy by increasing to twice-daily dosing (before breakfast and before dinner) for 4-8 weeks before proceeding to endoscopy. 1

Rationale for Dose Escalation First

This patient has typical GERD symptoms (heartburn and reflux) without alarm features, making him appropriate for empiric PPI therapy. However, he has only tried over-the-counter (likely once-daily) PPI for 2 months with minimal relief. 1

The 2022 AGA guidelines explicitly recommend this stepwise approach:

• When single-dose PPI therapy provides inadequate response, dosing should be increased to twice daily before pursuing diagnostic testing 1
• Only after failure of twice-daily PPI therapy for 4-8 weeks should endoscopy be performed 1

Why Not Endoscopy Yet?

Endoscopy is premature at this stage because:

• The patient lacks alarm symptoms (no dysphagia, odynophagia, weight loss, bleeding, or anemia) that would mandate immediate endoscopy 1, 2
• He has not yet failed an adequate trial of optimized PPI therapy (twice-daily dosing) 1
• Most authorities do not consider patients "PPI-refractory" unless they have been on double-dose PPIs 3

Clinical Context Supporting This Approach

This patient has multiple risk factors for true GERD:

• Age 55 years with long-standing symptoms 1, 2
• Obesity (BMI 32) 1, 2
• Former smoker (20 pack-years) 1, 2

These factors increase his likelihood of having genuine acid reflux that may respond to higher-dose PPI therapy. 1, 2

Practical Implementation

Specific dosing strategy:

• Prescribe a standard PPI (omeprazole 40 mg, lansoprazole 30 mg, or esomeprazole 40 mg) twice daily 1
• Instruct to take 30-60 minutes before breakfast and 30-60 minutes before dinner 1
• Reassess response at 4-8 weeks 1

Also address compliance and lifestyle factors:

• Confirm he was taking OTC PPI correctly (before meals, not as needed) 4, 5
• Reinforce weight loss given BMI 32 1
• Avoid late meals, trigger foods, and elevate head of bed 1

When to Proceed to Endoscopy

Endoscopy becomes indicated if:

• Symptoms persist or only partially improve after 4-8 weeks of twice-daily PPI 1
• Any alarm symptoms develop (dysphagia, bleeding, weight loss, recurrent vomiting) 1, 2
• He requires long-term PPI therapy beyond 12 months without objective confirmation of GERD 1

At that point, endoscopy should evaluate for:

• Erosive esophagitis (Los Angeles classification) 1
• Barrett's esophagus (given age >50, chronic symptoms, smoking history, obesity) 1, 2
• Hiatal hernia and Hill grade 1
• Alternative diagnoses (eosinophilic esophagitis, stricture, malignancy) 1, 5

Common Pitfall to Avoid

Do not proceed directly to endoscopy in patients with typical GERD symptoms and no alarm features who have not yet had an adequate trial of twice-daily PPI. 1 This represents overuse of endoscopy, which occurs in 10-40% of cases, contributing to unnecessary costs and patient exposure to procedural risks without improving outcomes. 6 The evidence-based pathway requires optimizing medical therapy first. 1