Discontinue Omeprazole and Address Iron Deficiency
This patient should discontinue omeprazole immediately given the normal endoscopy, only occasional reflux symptoms, and progressive iron deficiency that is likely PPI-induced. The 2022 AGA guideline on PPI de-prescribing explicitly identifies "uninvestigated dyspepsia" and functional symptoms without sustained PPI response as inappropriate indications for continued therapy 1. With a normal endoscopy ruling out erosive esophagitis, Barrett's esophagus, or other structural pathology requiring ongoing acid suppression, this patient has no evidence-based indication for chronic PPI therapy.
Why Discontinue the PPI
The clinical picture strongly suggests PPI-induced iron malabsorption:
- Progressive ferritin decline (30 points over 12 months) temporally correlates with omeprazole use
- Normal endoscopy excludes occult GI bleeding or malabsorptive conditions
- Mechanism is well-established: PPIs directly upregulate hepcidin, which blocks duodenal ferroportin and iron absorption 2. This occurs independent of gastric acid suppression through aryl hydrocarbon receptor pathways
The FDA label for omeprazole warns that stomach acid reduction impairs vitamin B-12 absorption and notes this concern extends beyond 3 years of use 3. While the label doesn't explicitly mention iron, multiple case reports document iron deficiency anemia from long-term PPI use even without GI blood loss 4, 5.
Critical pitfall: Continuing the PPI while treating iron deficiency will result in treatment failure. One study showed only 16% of iron-deficient patients on omeprazole achieved normal hemoglobin response to oral iron supplementation 6.
How to Discontinue
For patients with only occasional reflux and normal endoscopy, abrupt discontinuation is appropriate 1. The original symptoms (dysphagia with occasional reflux after certain foods) suggest dietary triggers rather than pathologic GERD requiring pharmacotherapy.
Provide the patient with:
- Dietary counseling to avoid trigger foods
- Antacids for breakthrough symptoms (calcium carbonate or magnesium hydroxide as needed)
- Reassurance that rebound acid hypersecretion may occur for 2-4 weeks but is self-limited
If symptoms recur and are intolerable, consider on-demand PPI therapy (taking 40 mg only when symptomatic), which has equivalent efficacy to continuous low-dose therapy for non-erosive GERD 7.
Managing the Iron Deficiency
Once the PPI is stopped, initiate iron repletion:
Start with oral iron supplementation 8:
- Ferrous sulfate 325 mg once daily (preferred as least expensive) 8
- Take on empty stomach with 500 mg vitamin C to enhance absorption 8
- Once-daily dosing is sufficient; every-other-day dosing may improve tolerance with similar absorption 8
Recheck ferritin in 3 months. If ferritin fails to improve by at least 20 μg/dL despite PPI discontinuation and oral iron adherence, switch to intravenous iron 8. The 2024 AGA guideline recommends IV iron when oral supplementation fails to restore iron stores 8. Choose a high-dose formulation requiring only 1-2 infusions (such as ferric carboxymaltose or iron isomaltoside) 8.
Key Monitoring Points
- Ferritin every 3-4 months until normalized and stable
- Hemoglobin/hematocrit if anemia develops
- Symptom diary for 4 weeks post-PPI discontinuation to assess true reflux burden
- If ferritin continues declining despite PPI cessation and iron therapy, investigate other causes (celiac disease, H. pylori, occult bleeding sources) 8
The bottom line: This patient's iron deficiency is iatrogenic from unnecessary chronic PPI therapy. Stop the omeprazole, replace the iron, and manage reflux with lifestyle measures and as-needed antacids.