• Provides reliable relief from frequent heartburn and acid reflux
  • Helps heal and prevent stomach and duodenal ulcers
  • Trusted PPI that also protects the stomach during long-term NSAID use

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Overview

If heartburn or acid reflux is stopping you from enjoying meals, keeping you awake at night, or leaving you constantly reaching for quick fixes, Lansoprazole could be the answer. This trusted treatment works by reducing excess stomach acid, easing burning pain and indigestion, and protecting your food pipe (oesophagus) from further irritation. With Lansoprazole, you can finally focus on living your life — not your symptoms.

At SwiftMedi, every request is carefully reviewed by a UK-registered prescriber through a secure online consultation, with discreet delivery straight to your door.


What is Lansoprazole 


Lansoprazole is a proton pump inhibitor (PPI) that works by reducing the amount of acid produced in the stomach. By tackling the root cause of reflux, it not only relieves symptoms but also allows the oesophagus and stomach lining to heal, helping prevent further irritation and discomfort.

It is commonly prescribed for frequent heartburn and acid reflux, gastro-oesophageal reflux disease (GORD), and for the treatment and prevention of stomach and duodenal ulcers. Lansoprazole is also used to protect the stomach in people who need long-term treatment with NSAIDs.

Many patients begin to notice improvement within just a few days, with the full benefit usually seen after 1–2 weeks of consistent use, making it a reliable option for both short-term relief and long-term management of reflux conditions.

Directions

  • Usual dose: 15mg to 30mg once daily.
  • Take in the morning, at least 30 minutes before food.
  • Swallow capsules whole with water — do not crush or chew.
  • Duration depends on your condition — from 2–4 weeks for short-term heartburn to longer courses for GORD or ulcers.


Always follow the exact instructions from your prescriber.

Side Effects

Like all medicines, lansoprazole can cause side effects, although not everyone will experience them. Most are mild, short-lived, and improve as your body adjusts to treatment.

Common (may affect up to 1 in 10 people):

  • Headache – usually mild and temporary.
  • Stomach pain, constipation, diarrhoea, or nausea – digestive upset is the most frequently reported effect but is generally mild.
  • Flatulence (wind) – some people may notice bloating or excess gas.


Uncommon (may affect up to 1 in 100 people):

  • Dizziness, tiredness, or sleep problems – these may affect alertness; avoid driving if you feel unwell.
  • Dry mouth or taste changes – usually mild and temporary.
  • Skin rash or itching – generally mild, but seek advice if persistent.


Rare but serious (seek urgent medical advice):

  • Severe allergic reaction (anaphylaxis) – symptoms may include swelling of the face, lips, tongue, or throat, difficulty breathing, or a sudden rash.
  • Severe stomach pain or persistent vomiting – may indicate bleeding or complications from ulcers.
  • Yellowing of the skin or eyes (jaundice) – a possible sign of liver problems.


Most people tolerate lansoprazole well, and side effects (if they do occur) are usually mild. If you are concerned about any symptoms, or if they do not improve, speak to your doctor, pharmacist, or prescriber.

Disclaimer: This is not a complete list of side effects. Always read the patient information leaflet provided with your medicine for full details. If you experience severe or worrying symptoms, seek medical advice straight away. In an emergency, call 999 or go to A&E.

Warnings

Lansoprazole may not be suitable if you:

  • Are allergic to lansoprazole or other PPIs
  • Have liver disease
  • Are taking medicines such as digoxin, warfarin, methotrexate, HIV medicines, or antifungals (interactions possible)
  • Are pregnant or breastfeeding — seek advice before use
  • Require long-term treatment — monitoring may be needed for vitamin B12, magnesium, or bone health
Frequently asked questions

  • What is lansoprazole and how does it work?

    Lansoprazole is a proton pump inhibitor (PPI) that reduces stomach acid production. It is widely used for conditions such as heartburn, acid reflux, indigestion, gastritis and stomach ulcers. By lowering acid levels, it allows inflammation in the oesophagus and stomach to heal. It also helps prevent flare-ups when taken correctly.

  • How long does lansoprazole take to relieve heartburn?

    Many people start feeling some improvement within a few hours, but full relief often takes two to four days as acid levels gradually reduce. Lansoprazole is designed for sustained control rather than instant relief. For sudden flare-ups, antacids or alginates may help while the PPI takes effect.

  • How do I take lansoprazole for best results?

    Take lansoprazole first thing in the morning, at least 30 minutes before food. Swallow capsules whole with water. Consistency is important, so take it at the same time daily. Avoid lying down after meals and limit trigger foods for maximum benefit. Speak to a clinician if symptoms persist.

  • Is lansoprazole stronger or weaker than omeprazole?

    Lansoprazole and omeprazole offer similar acid-reducing effects, and most people respond equally well to either medicine. Some find one works better or causes fewer side effects. Lansoprazole sometimes starts acting slightly quicker, while omeprazole may offer more consistent long-term control. A clinician can help decide the best option.

  • What side effects can lansoprazole cause?

    Common side effects include headache, nausea, abdominal pain, diarrhoea or constipation. These usually settle with continued use. Rare effects include dizziness or skin rashes. Very long-term treatment may affect vitamin and mineral levels, so periodic reviews are recommended. Most people tolerate lansoprazole well when taken as prescribed.

  • Is lansoprazole safe for long-term use?

    Long-term use can be safe when monitored, especially for chronic conditions like severe reflux or ulcer prevention. However, PPIs may affect magnesium, calcium or B12 levels if used for extended periods. Regular reviews help ensure you remain on the lowest effective dose.

  • Who should not take lansoprazole?

    Lansoprazole may not be suitable for people with severe liver disease, unexplained weight loss, difficulty swallowing or signs of gastrointestinal bleeding. It may also interact with some medicines used for HIV, blood thinning or fungal infections. A consultation confirms whether it’s the right option.

  • Can I use lansoprazole for reflux-related cough or throat symptoms?

    Yes. Lansoprazole can help if your cough, hoarseness or throat irritation is caused by acid reaching the upper airway. Symptoms may take longer to improve because throat tissues heal slowly. If a cough persists despite treatment, a clinician may investigate other causes.

  • What should I do if lansoprazole stops working?

    Yes. Many people combine antacids with lansoprazole for rapid relief, especially while waiting for the PPI to take full effect. Leave at least a two-hour gap between lansoprazole and antacids to avoid affecting absorption. This combination is commonly used during flare-ups.

  • Does lansoprazole help with stomach ulcers or gastritis?

    Yes. Lansoprazole is often prescribed to help ulcers heal by reducing stomach acid and protecting the lining. It can also improve symptoms of gastritis caused by irritation, stress or NSAID use. Treatment duration varies depending on severity and underlying cause.

  • Can I drink coffee or alcohol while taking lansoprazole?

    You can, but both caffeine and alcohol can worsen reflux and slow healing. Coffee increases acid production, while alcohol relaxes the valve above the stomach. Reducing these triggers can improve treatment results and help prevent flare-ups.

  • Is lansoprazole suitable during pregnancy or breastfeeding?

    Lansoprazole is sometimes used in pregnancy when symptoms are troublesome, but milder treatments such as antacids or alginates are usually recommended first. It is generally considered compatible with breastfeeding, though advice varies by individual. Always check with a clinician before starting treatment.

  • Can lansoprazole affect vitamin or mineral levels?

    Long-term use may reduce absorption of magnesium, calcium and vitamin B12 because stomach acid plays a role in nutrient uptake. This is uncommon but more likely with prolonged or high-dose therapy. Periodic monitoring and dietary adjustments can help maintain healthy levels.

  • How long should I use lansoprazole before stepping down the dose?

    Many people use lansoprazole for two to eight weeks before tapering to a lower dose or occasional use. Stepping down too quickly may cause rebound symptoms, so gradual reduction is usually best. A clinician can help plan the safest approach for long-term control.