A 60-year-old woman presents with abdominal pain, nausea and weight loss. Endoscopy is performed and shows active gastritis with a duodenal ulcer.
Biopsies show Helicobacter pylori (H. pylori) infection and she is treated with quadruple therapy. She returns to the clinic for follow-up two months later and reports feeling well with no residual symptoms. She has stopped the proton pump inhibitors (PPI) and reports infrequent pyrosis.
What is the best next step?