Omeprazole vs Lansoprazole: Side Effects Compared

When choosing between omeprazole and lansoprazole for acid reflux treatment, understanding their side effect profiles is crucial. Both are proton pump inhibitors (PPIs) that effectively reduce stomach acid, but they may affect individuals differently. This comparison helps you understand the differences between these two popular acid reflux medications to make an informed decision about your treatment options.

  • Both medications belong to the same PPI drug class but have different side effect frequencies
  • Omeprazole may cause more frequent headaches whilst lansoprazole may affect digestion differently
  • Long-term use considerations vary slightly between the two medications
  • Individual response to side effects can vary significantly between patients
Start your free consultation

Takes less than 2 minutes to complete, 100% online

usp of our everydaymeds for Acid Reflux
usp of our everydaymeds for Acid Reflux

Available Treatments

Choose from a wide range of clinically-proven, safe, and effective treatments for Acid Reflux & Heartburn Treatment.

Frame 1321316359 (4).jpg__PID:471262e0-b5c1-4a81-8645-798924de6af3

Omeprazole 20mg

From £12.99

Learn More
Frame 1321316360 (4).png__PID:edbd79c0-7975-453d-b880-d8404a209232

Lansoprazole 15mg Capsules

From £5.99

Learn More
Frame 1321316361 (6).png__PID:dc692acd-7ef0-4d11-94cc-c9625acc0a5d

Famotidine Tablets

From £8.49

Learn More
Frame 1321316362 (3).png__PID:c3206fc2-75dd-4646-97ef-62f7d86d8e74

Lansoprazole 15mg Orodispersible Tablets

From £8.49

Learn More
Frame 1321316363 (3).png__PID:87837d9a-6a6c-4bd3-8dc1-00bdbeb52460

Losec MUPS 20mg Tablets

From £29.99

Learn More
Frame 1321316387 (1).png__PID:8814b58d-07c6-4357-8cab-3bf394b7bd4d

Pantoprazole

From £5.99

Learn More
Frame 1321316388 (1).png__PID:7ee9715c-b838-4f97-aae7-92a4bf86c0f8

Rabeprazole

From £19.99

Learn More
Frame 1321316389 (1).png__PID:a28e97f3-0d1c-4846-9dd7-ad8e0eddbe71

Esomeprazole

From £16.99

Learn More

Understanding PPI Side Effects: What to Expect

Common Side Effects Comparison

Omeprazole and lansoprazole share many similar side effects, but their frequency and severity can differ. Omeprazole commonly causes headaches (affecting up to 3% of patients), nausea, diarrhoea, and stomach pain. Lansoprazole tends to cause similar digestive symptoms but may have a slightly lower incidence of headaches whilst potentially causing more dizziness in some patients.

Digestive System Effects

Both medications can paradoxically cause digestive symptoms whilst treating acid-related conditions. Omeprazole may cause nausea, vomiting, constipation, or diarrhoea in approximately 1-4% of patients. Lansoprazole presents similar digestive side effects but some patients report better tolerance regarding nausea. Long-term use of either medication may affect nutrient absorption, particularly vitamin B12, magnesium, and calcium.

Neurological Side Effects

Headaches are more commonly reported with omeprazole use compared to lansoprazole. However, lansoprazole may cause dizziness or fatigue more frequently. Both medications can occasionally cause confusion or mood changes, particularly in elderly patients or those on long-term treatment.

Serious Side Effects Considerations

Both omeprazole and lansoprazole carry similar risks for serious side effects with long-term use. These include increased risk of bone fractures, kidney problems, and potential increased infection risk due to reduced stomach acid. The risk profile is generally comparable between the two medications, making individual tolerance the primary differentiating factor.

EverydayMeds Treatment Options

EverydayMeds offers both omeprazole 20mg capsules and lansoprazole 15mg capsules, allowing patients to choose based on their individual response and tolerability. We also stock Losec MUPS 20mg tablets for those preferring branded omeprazole, plus alternative PPIs like pantoprazole and esomeprazole if neither omeprazole nor lansoprazole proves suitable. For patients experiencing PPI side effects, famotidine tablets offer an H2 blocker alternative with a different side effect profile.

Making the Right Choice

Choosing between omeprazole and lansoprazole often depends on individual tolerance rather than effectiveness, as both are similarly effective for acid reflux treatment. If you experience headaches with omeprazole, lansoprazole might be better tolerated. Conversely, if lansoprazole causes dizziness, omeprazole could be preferable. Both medications require consistent timing and should be taken before meals for optimal effectiveness.

How it
Works?

Group 469326.png__PID:d1d71928-56cc-4f79-bdc7-0a45d0bc6b99
Background (1).png__PID:62282697-4455-4e74-a869-705c14f98b30
Background (3).png__PID:72aeaaf6-bb5b-4dd5-8914-6efdf80a1555

Start your assessment for Acid Reflux & Heartburn

Start your journey to better health today.

List.svg__PID:b4a5b990-cf62-48e4-ba8f-0a8bffce6cc6

Start your journey to better health today.

Once you complete a short online assessment, you’ll be able to choose your preferred treatment and quantity from a list of safe, medically approved options tailored to you.

Start My Assessment

Returning customer?

Log in to Your Account

Frequently Asked Question