Lansoprazole is a treatment for acid reflux and GERD. Acid reflux is when acid from the stomach travels into your food pipe and throat. It causes a burning sensation that we know as heartburn. Other symptoms can include bloating and bad breath. Lansoprazole treats acid reflux by stopping the cells in the lining of your stomach from producing too much acid.
Persistent and recurring acid reflux is called GERD (Gastro-esophageal reflux disease).
Lansoprazole is a generic version of other branded treatments, such as Prevacid. It’s available either as a capsule that’s taken with water, or as a tablet that melts in the mouth.
How does Lansoprazole work?
Acid reflux happens when acid in the stomach passes through the ring of muscle that holds the bottom of the esophagus closed, and then enters the food pipe and throat.
Your stomach uses acid to break down the food you eat so that your body can digest it. It’s produced by proton pumps in the lining of your stomach wall. Sometimes, though, they produce too much and it goes up into your food pipe.
Lansoprazole prevents the proton pumps from producing too much acid. As a result there isn’t excess acid to travel to the food pipe and cause heartburn and the other symptoms associated with acid reflux and GERD.
What doses of Lansoprazole are there?
Lansoprazole capsules come in two doses: 15mg and 30mg. They’re swallowed with water, and can be taken once or twice a day.
It’s also available as a dissolvable orodispersible tablet that melts on the tongue and doesn’t need to be taken with water.
For acid reflux, treatment usually involves taking one 30mg tablet or capsule daily for four weeks.
This page was written by The Treated Content Team.
This page was medically reviewed by Dr. Joseph Palumbo on February 20, 2025. Next review due on February 20, 2028.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
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How to take Lansoprazole
How you take lansoprazole depends on the version you are taking. It’s important that you read the leaflet that comes with it beforehand. If you‘re unsure about anything to do with taking the medicine, let a doctor know.
Put the tablet into your mouth and allow it to dissolve before swallowing.
Use a syringe if you struggle to take the tablet. For full instructions on how to take it with the syringe, check the package insert.
How long does it take Lansoprazole to work?
Lansoprazole starts to work straight away. Within a few days, you should start to feel relief from symptoms like acid reflux,heartburn and indigestion, but it can take up to four weeks to feel the full effects.
It takes just under two hours for lansoprazole to reach the bloodstream, but can take 50% longer if you take it with food.
What should I do if I make a mistake when taking Lansoprazole?
If you forget to take a dose of lansoprazole you should take your medication as soon as you remember. If it’s time for your next dose, skip the missed dose and carry on as usual. Never take a double dose of lansoprazole.
If you take too much lansoprazole seek medical advice immediately.
This page was written by The Treated Content Team.
This page was medically reviewed by Dr. Joseph Palumbo on February 20, 2025. Next review due on February 20, 2028.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
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Lansoprazole isn’t suitable for everyone, and there are some things that you need to be aware of when taking it.
Here’s all the official info on it. If anything is unclear, let our physician know, and they can talk with you about it.
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Lansoprazole: FAQ
Have something specific you want to know? Search our info below, or ask our experts a question if you can’t find what you’re looking for.
Is Lansoprazole similar to any other treatments?
Answer:
There are a range of drugs used to treat acid reflux and GERD. Although they have different names and are produced by different companies, they all tend to be proton pump inhibitors and work by reducing the amount of acid produced in your stomach.Â
Lansoprazole is available as both a capsule and dissolvable tablet, so you can choose which type you’d like to use. It’s a generic medicine, and there is a branded version of it called Prevacid.Â
Being a generic treatment makes Lansoprazole a cheaper alternative to its branded equivalents.Â
How is Lansoprazole different to other GERD medications?
Answer:
Lansoprazole is a generic treatment. This means that it’s available as a branded medicine, but the generic version is likely to be a cheaper option.Â
There are other generic and branded treatments for acid reflux and GERD, but not many of them are available as a dissolvable tablet.
Which dose of Lansoprazole should I use?
Answer:
Our doctor can advise you on which form and dose to take, it will most likely depend on your symptoms and how bad they are.Â
When taken to treat acid reflux and GERD, you’ll typically be prescribed the 15mg or 30mg dose and have to take it once a day for four weeks. If symptoms still persist, it can be taken for an additional four weeks.
When taken to treat an ulcer, 30mg is almost always the prescribed dose. The length of treatment depends on where the ulcer is. A gut ulcer usually involves two weeks of treatment, and a stomach ulcer usually involves a four week course of treatment.Â
In some cases where GERD is chronic, your physician may suggest that you take lansoprazole for a prolonged period of time.
Which version of Lansoprazole should I use?
Answer:
The orodispersible version of Lansoprazole might suit you better if you don’t like swallowing tablets, or if you have difficulty swallowing. It comes in the same doses as the capsules, and works equally as effectively.Â
It can be placed in your mouth, where it melts, or mixed with water in a syringe. This is then emptied into your mouth.
Both the capsules and orodispersible tablets should be taken around half an hour before food. If you’re not sure which type of Lansoprazole you need, you can get some advice from a physician. But it’s usually a case of personal preference.Â
How effective is Lansoprazole?
Answer:
Lansoprazole is a highly effective and fast acting treatment for acid reflux and GERD. It can help reduce symptoms in under two hours, and symptoms usually disappear after four weeks of treatment.
When used as a long term treatment for GERD, Lansoprazole is highly effective and offers relief from symptoms for over 70% of people who take it for over five years.[1]
Do I need a prescription for Lansoprazole?
Answer:
This depends on the dose. Lansoprazole 15mg is available over the counter (OTC), while 30mg requires a prescription. A physician will chat with you about your symptoms and medical history to make sure that they prescribe you the right dose. You should also be monitored as you take the medication to check that it’s working.
Treated trusted source:
Kovacs, T.O., et al. (2009). Long-Term Efficacy of Lansoprazole in Preventing Relapse of Erosive Reflux Esophagitis. Digestive Diseases and Sciences, [online] 54(8), pp.1693–1701.
Last updated on Feb 20, 2025.
How we reviewed this page:
Our experts continually monitor new findings in health and medicine, and we update our articles when new info becomes available.
Feb 20, 2025
Published by: The Treated Content Team.Medically reviewed by: Dr. Joseph Palumbo, Senior Medical Adviser
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
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Dr. Joseph Palumbo
Senior Medical Adviser
Joseph joined Treated in 2023, and is one of the lead doctors providing prescribing services for the platform.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
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