Hello,
A drop in hemoglobin from 14.8 g/dL to 12.8 g/dL within 4 months is not "normal" and warrants a medical evaluation, especially since you are experiencing symptoms like shortness of breath and easy fatigability.
Clinical Correlation
Your long-term use of PPIs (7 years) is a key factor here. Chronic use of these medications can lead to:
Malabsorption: PPIs reduce stomach acid, which is necessary for the optimal absorption of
Vitamin B12 and Iron from your diet.
Occult Blood Loss: It is important to ensure there isn't a slow, unnoticed loss of blood from the gastrointestinal tract that might be causing the hemoglobin to drop.
Recommended Action Plan
To identify the cause of this drop, I suggest the following:
Complete Blood Count (CBC) with Peripheral Smear: To look at the size and shape of your red blood cells (Microcytic vs. Macrocytic).
Serum
Ferritin & Iron Studies: To check for iron deficiency.
Vitamin B12 & Folic Acid Levels: Long-term PPI use very commonly leads to B12 deficiency.
Stool for Occult Blood: A simple test to rule out any internal blood loss.
Consult a Gastroenterologist: They can evaluate if your long-term PPI use needs adjustment and if further investigations like an endoscopy are required given your symptoms of "gas" and shortness of breath.
Immediate Advice
Do not stop your medications abruptly, but discuss a "step-down" plan with your doctor.
Increase your intake of iron-rich foods (spinach, beetroot, lean proteins) and Vitamin C (citrus fruits), which helps with iron absorption.
Avoid taking tea or coffee immediately after meals, as they can further inhibit iron absorption.
Summary: While your current level isn't dangerously low, the trend of the drop is the concern. Please get the blood work mentioned above to catch any deficiency early.