Proton pump inhibitors (PPIs) are the most widely used medicines for reducing stomach acid. They are used for acid reflux, ulcers and H. pylori treatment. Many people take them for months or years, and often ask whether that is safe.
Who may need them long term
- Severe inflammation of the food pipe (oesophagitis), or reflux that returns each time the medicine is stopped
- Barrett’s oesophagus
- People who need aspirin, anti-inflammatory painkillers or blood thinners and have had an ulcer or bleeding before
For these people, the benefit of staying on treatment is usually much greater than the risk.
Possible side effects
Short-term side effects such as headache, nausea or a change in bowel habit are uncommon and mild. Studies have linked long-term use with low magnesium and vitamin B12, some gut infections, and thinner bones. Most of these links come from studies that cannot prove the medicine was the cause, and the extra risk for any one person is small.
Using them well
- Take a PPI 30 to 60 minutes before a meal, as it works best this way
- Newer medicines such as vonoprazan (a potassium-competitive acid blocker) reduce acid more strongly than PPIs and do not need to be timed with meals. They can be a good option for long-term use.
- Use the lowest dose that controls your symptoms, and review the need at least once a year
- If you no longer need it, reduce the dose gradually rather than stopping suddenly. Stopping suddenly can cause a few weeks of rebound heartburn, which can be mistaken for the reflux coming back.
- Some people can take it only when symptoms flare, or switch to a milder acid-reducing medicine
Do not stop a medicine prescribed for Barrett’s oesophagus, severe oesophagitis or ulcer protection without speaking to your doctor first.
When to see a specialist
See a doctor if you still need acid medicine every day after a few months, if symptoms return quickly when you stop, or if you have warning signs such as difficulty swallowing, weight loss, vomiting or black stools. A gastroscopy may be advised.
General information only. Reviewed by Dr Chia Chung King, 2026-11-13. Book a consultation.