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Andy Stein
June 3, 2026

Common Questions and Answers about Lansoprazole

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Common Questions and Answers about Lansoprazole

Here are 5 common FAQs about lansoprazole.

1.❓What is lansoprazole used for

Lansoprazole is used to reduce the amount of acid produced by the stomach. It is commonly prescribed for acid reflux, gastro-oesophageal reflux disease (GORD), indigestion caused by excess stomach acid, stomach ulcers, and duodenal ulcers.

It may also be used to help prevent ulcers in people taking certain anti-inflammatory medicines and as part of treatment to eradicate Helicobacter pylori infection.

2.❓How does lansoprazole work

Lansoprazole belongs to a group of medicines called proton pump inhibitors (PPIs). It works by blocking the acid-producing pumps in the lining of the stomach.

This reduces the amount of acid produced, allowing irritation and ulcers in the oesophagus, stomach, and upper intestine to heal.

3.❓What are the common side effects of lansoprazole

Lansoprazole is generally well tolerated when taken at the recommended dose. Common side effects may include headache, diarrhoea, constipation, nausea, stomach pain, and dizziness.

Most side effects are mild and improve as the body adjusts to treatment.

4.❓What serious side effects should people be aware of

Serious side effects are uncommon but can include severe allergic reactions, significant skin reactions, liver problems, and an autoimmune inflammation of the kidneys called tubulo-interstitial nephritis (TIN).

Medical attention should be sought if symptoms such as difficulty breathing, swelling of the face or throat, severe rash, yellowing of the skin or eyes, or unexplained changes in urination occur.

Long-term use may also be associated with an increased risk of vitamin B12 deficiency, low magnesium levels, and certain bone fractures in some people.

5.❓What strengths does lansoprazole come in

Lansoprazole is commonly available as 15 mg and 30 mg capsules or orally disintegrating tablets. Some formulations are also available as oral suspensions.

Your doctor or pharmacist can advise on the most appropriate strength and dose based on your condition and individual circumstances.

Bonus Question

❓What are the common trade names of lansoprazole?

Lansoprazole is sold under a number of trade names, including Zoton®, Prevacid®, Lanzor®, and Takepron®.

It is also available as a generic medicine in many countries. Taking lansoprazole exactly as prescribed, usually before meals, can help achieve the best results and improve control of acid-related symptoms.

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