What are Proton Pump Inhibitors?
Proton Pump Inhibitors (PPI) are medications that are used to treat acid reflux and Gastric ulcers. They work by stopping/ reducing the acid production in the stomach. Although stomach acid is essential for digestion and absorption of food and nutrients, excess stomach acid can damage the stomach lining and cause Gastric ulcers, dyspepsia , acid reflux and Barrett’s esophagus (which can turn into esophageal cancer). Omeprazole (prilosec), Pantoprazole (Protonix) , esomeprazole (Nexium) are some of the PPIs that are widely used by people.
Complications of long term use of PPI

- Acute interstitial nephritis or CKD
- It is unclear how PPI use can cause CKD or interstial nephritis
- Pneumonia
- Long term PPI use alters the stomach acidity and thereby cause a disruption in stomach bacteria. This increases the risk of pneumonia.
- Increased GI infection
- Long term PPI use alters the stomach acidity and thereby cause a disruption in stomach bacteria. This can lead to Infectious colitis or Clostridium difficle infection.
- Iron Deficiency
- Stomach acid is necessary for absorption of certain minerals and vitamins. By inhibiting stomach acid the absorption of iron is impaired and thereby it causes iron deficiency anemia.
- Vitamin B12 deficiency
- Stomach acid is necessary for absorption of certain minerals and vitamins. By inhibiting stomach acid the absorption of Vitamin B12 is impaired. This can lead to feeling fatigue / Tired and anemia secondary to vitamin B12 deficiency
- Bone fracture
- Stomach acid is necessary for absorption of certain minerals and vitamins. By inhibiting stomach acid the absorption of calcium is impaired. Calcium is necessary for bones. Calcium impairment can lead to osteoporosis (fragile bones) that can easily fracture.
- Hypomagnesemia
- Stomach acid is necessary for absorption of certain minerals and vitamins. By inhibiting stomach acid the absorption of magnesium is impaired. Magnesium is essential for many important body functions including cardiac activity .
- Medication interaction (omeprazole reduces the effectiveness of clopidogrel)
- Clopidogrel is a medication that prevents blood vessels from clogging. This medication absorption is affected by omeprazole (a PPI). Other Proton Pump Inhibitors don’t affect the absorption of clopidogrel (Plavix).
If you’re on a PPI don’t discontinue without consulting with your doctor. All medications have some side effects, but discuss with your doctor to see if the benefits of medication outweighs the risks in your situation. Rapidly stopping the PPI can cause rebound acid reflux symptoms. If you’re taking a PPI for acid reflux , try to change your diet and control the symptoms with lifestyle modifications as much as possible to reduce the use of medications and to reduce the risk of side effects.
