A doctor explains why it is important to be mindful of timing
Charlotte Smith Senior Lifestyle Content Editor
12:52, 15 Sep 2026
The doctor has shared an important recommendation(Image: Getty )
A doctor has issued a message to anyone taking omeprazole for acid reflux or heartburn, concerning the ‘timing’ of the medication. Health specialist Dr Farhan Abdullah explains that those who have been prescribed this widely used medicine can “prevent potential side effects” by following the same routine each morning before sitting down to breakfast.
Dr Farhan Abdullah is a board-certified internist and the medical director of Magnolia Functional Wellness. The physician leader specialises in functional medicine, hormone optimisation, metabolic health, and medically supervised weight loss.
According to the NHS, omeprazole is a proton pump inhibitor (PPI) medicine that reduces the amount of acid your stomach produces. It is typically prescribed to treat heartburn and acid reflux (GORD/GERD). According to research, around one in seven people take proton pump inhibitors like omeprazole in the UK.
Stressing the significance of “establishing a routine”, Dr Farhan Abdullah advises those taking the medication to do so upon waking, generally 30 to 60 minutes before their first meal of the day — such as breakfast. He maintains that this approach can deliver the “greatest relief”.
Speaking exclusively to the Daily Mirror, he said: “Most people find that they experience their greatest relief from their acid-related issues when they take their omeprazole right after waking up. Therefore, my recommendation is to take your omeprazole right before your first meal of the day.
The doctor says people often find taking it in the morning provides “greatest relief” (stock image)(Image: Jana Murr via Getty Images)
“Omeprazole works better if you take it prior to the stomach’s acid-producing pumps being turned on by eating. Taking your omeprazole at the same approximate time every day will help you establish a routine and prevent potential side effects due to irregular timing.”
The Cleveland Clinic explains that when you take your medication at varying times instead of consistently at the same time daily, your stomach acid levels become unstable. This can trigger heartburn, acid reflux, and breakthrough stomach pain. If you take it after a substantial meal rather than beforehand, the medication cannot inhibit the stomach acid pumps as effectively as it should.
Evidence suggests that people across the UK typically consume breakfast between 7-9am during the working week. If breakfast is eaten at 7am, this would require taking omeprazole first thing in the morning, somewhere between 6am and 6.30am.
Why is it key to take omeprazole at the same time each day and in the morning?
The NHS advises taking omeprazole immediately upon waking, usually 30 to 60 minutes before your first meal of the day, for the most effective relief for most people. Since omeprazole deactivates the acid-producing pumps in your stomach, consuming your first meal after taking the medication helps stimulate these pumps, enabling the drug to prevent excessive acid production.
Taking the medication on an empty stomach also helps the body absorb the correct quantity into your bloodstream. Maintaining a consistent schedule ensures a steady level of the drug remains in your system. Irregular timing can leave your stomach vulnerable and trigger symptoms such as heartburn to reappear.
If your doctor has prescribed it twice daily, you may have been advised to take one dose in the morning and a second before your evening meal. Always adhere to your own doctor’s instructions if they have provided a specific schedule for an uncommon condition.
Swallow capsules or tablets whole with a full glass of water; do not crush or chew them. Omeprazole does not provide instant relief from heartburn. It typically takes between one and four days of daily use to experience the full benefit. Further information on safe usage can be found in the NHS Omeprazole Guide.
What are the common short-term side effects?
These are generally mild, short-lived, and tend to ease as your body adapts:
Flatulence (gas) and bloating.Stomach pain or abdominal discomfort.Nausea or vomiting.Constipation (less common).Headache.Diarrhoea or mild loose stools.What else should people taking omeprazole be aware of?
Dr Farhan Abdullah said: “Patients should understand that although PPIs are highly effective in treating gastroesophageal reflux disease (GERD) and related disorders. They should ideally be used at the minimum dosage required to control their symptoms for the shortest duration necessary.
“Continued long-term use is acceptable in select cases; however, each patient’s clinical situation will require periodic assessments by the clinician regarding the necessity of the medication, as well as assessing issues including nutritional deficiencies, renal dysfunction, and gastrointestinal side effects.”
He also said: “Once you’ve taken a PPI continuously for a long time and then stop taking it, your stomach will produce more acid than usual for a short time. This is called rebound acid hypersecretion. So, even though your heartburn may come back, this doesn’t mean you’ll always need to take as much medication as you did before.”