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Lansoprazole delayed-release capsules on a matte clinical surface
DoseRoutine Lansoprazole — Lansoprazole delayed-release capsules on a matte clinical surface. Original DoseRoutine photography.
medicationOTC supplementLansoprazole is FDA-approved both as a prescription proton pump inhibitor and, at a lower OTC strength (Prevacid 24HR), for frequent heartburn

LansoprazoleBenefits, Dosage & Interactions

Also known as: Prevacid

Lansoprazole is a proton pump inhibitor that shuts down the stomach's acid-secreting pumps, used for reflux disease, erosive oesophagitis, peptic ulcers, H. pylori eradication regimens and Zollinger-Ellison syndrome. It is typically taken in the morning. The reported plasma half-life is about 1.5 hours, which shapes dosing frequency.

How much Lansoprazole do people take?

Lansoprazole 15 mg once daily was used as maintenance therapy in these trials, with 30 mg once daily used for initial healing of erosive esophagitis in the Laine et al. head-to-head study. Route reported: Oral, delayed-release capsule or orally disintegrating tablet. Frequency reported: Once daily, generally taken before a meal. These are amounts documented in the cited studies and labels for Lansoprazole — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.

See the full reported protocol and its sources

Researched by DoseRoutine Research TeamReviewed for accuracy by Nicholas Alexander, RSE, SO, PMPLast updated Educational reference only — not medical advice. Always confirm dosing and safety decisions with a licensed clinician.

Evidence: Strong — 3 human randomized trials and regulatory approval on file.
Evidence strengthStrong · 4/4
PreclinicalStrong human evidence

3 human randomized trials and regulatory approval on file.

Chemical structure of Lansoprazole (PubChem CID 3883)
Structure via PubChem

Quick answer

Lansoprazole is a proton pump inhibitor that shuts down the stomach's acid-secreting pumps, used for reflux disease, erosive oesophagitis, peptic ulcers, H. pylori eradication regimens and Zollinger-Ellison syndrome. It works best taken 30–60 minutes before a meal, and full effect builds over several days. Long-term use is associated with reduced absorption of magnesium, B12 and calcium.

Class
Proton pump inhibitor (H+/K+-ATPase inhibitor)
Brand names
Prevacid, Zoton; also sold over the counter
Best taken
30–60 minutes before the first meal of the day
Onset
Acid suppression starts within hours; full effect over 2–4 days
Common side effects
Headache, diarrhea, abdominal pain, nausea
Long-term associations
Low magnesium and B12, C. difficile, fracture risk

Compiled by DoseRoutine from public sources including NIH/MedlinePlus, the FDA label, Mayo Clinic and PubChem. Educational information, not medical advice.

Plasma half-life
1.5–2 h
Typical timing
in the morning
Food rule
on an empty stomach
Default unit
mg

What published protocols report

Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.

Reported amounts
Lansoprazole 15 mg once daily was used as maintenance therapy in these trials, with 30 mg once daily used for initial healing of erosive esophagitis in the Laine et al. head-to-head study[1][2][3]
Route studied
Oral, delayed-release capsule or orally disintegrating tablet[1][2][3]
Frequency
Once daily, generally taken before a meal[1][2][3]
Cycle length
Healing phases of roughly 8 weeks followed by maintenance periods extending up to 5 years in the longest cited trial[1][2][3]

Reported for Lansoprazole in the cited sources. Published ranges are not dosing advice.

References & evidence

Documents the Lansoprazole entry is written from. Each number matches an inline marker above.

  1. [1]Vonoprazan Versus Lansoprazole for Healing and Maintenance of Healing of Erosive Esophagitis: A Randomized TrialLaine L, DeVault K, Katz P, Mitev S, Lowe J, Hunt B, Spechler S · Gastroenterology · 2023 · Peer-reviewed · PMID 36228734
  2. [2]Vonoprazan as a Long-term Maintenance Treatment for Erosive Esophagitis: VISION, a 5-Year, Randomized, Open-label StudyUemura N, Kinoshita Y, Haruma K, Kushima R, Yao T, Akiyama J, Aoyama N, Baba Y, Suzuki C, Ishiguro K · Clinical Gastroenterology and Hepatology · 2025 · Peer-reviewed · PMID 39209187
  3. [3]Vonoprazan 10 mg or 20 mg vs. lansoprazole 15 mg as maintenance therapy in Asian patients with healed erosive esophagitis: A randomized controlled trialXiao Y, Qian J, Zhang S, Dai N, Chun HJ, Chiu C, Chong CF, Funao N, Sakurai Y, Eisner JD, Xie L, Chen M · Chinese Medical Journal · 2024 · Peer-reviewed · PMID 38654422

References & Evidence

Sources on this page that document Lansoprazole dosing, timing and safety.

  1. [1]U.S. National Library of Medicine View source
  2. [2]National Center for Biotechnology Information View source

Educational information only — not medical advice. Dose ranges vary by person, indication and prescriber.

What is Lansoprazole?Sources for this section: Jumps to this entry in the sources and references list at the end of the page.

Lansoprazole is a medication classified as a proton pump inhibitor (PPI). It is primarily used to decrease the amount of acid produced in the stomach. Conditions treated with lansoprazole include gastroesophageal reflux disease (GERD), erosive esophagitis (damage to the esophagus from stomach acid), and Zollinger-Ellison syndrome (a condition where the body produces too much stomach acid). It can also be used in combination with antibiotics to treat *Helicobacter pylori* (H. pylori) infection, which can cause ulcers. As a PPI, lansoprazole works by irreversibly blocking the proton pumps in the stomach lining, which are responsible for the final step in acid production. This leads to a significant and sustained reduction in gastric acid secretion. Lansoprazole is available in various forms, including capsules, orally disintegrating tablets, and suspensions. It is typically taken once daily before a meal. Lansoprazole is available by prescription and also in lower doses as an over-the-counter (OTC) medication for the treatment of frequent heartburn. The duration of treatment varies depending on the condition being treated, ranging from a few weeks for acute conditions to long-term use for chronic acid production issues like Zollinger-Ellison syndrome.

What does the research say about Lansoprazole?

Tap a section to expand.

Lansoprazole belongs to the class of medications known as proton pump inhibitors (PPIs). The mechanism of action involves its conversion to an active form within the acidic environment of the secretory canaliculi of the parietal cells in the stomach. This active form then binds irreversibly to the H+/K+-ATPase enzyme, also known as the proton pump. The proton pump is responsible for the final step in the secretion of gastric acid (hydrogen ions) into the stomach lumen. By irreversibly inhibiting these proton pumps, lansoprazole effectively blocks the production of stomach acid. This inhibition is dose-dependent and results in a significant and prolonged reduction in both basal (resting) and stimulated (meal-induced) acid secretion. Because the binding is irreversible, new proton pumps must be synthesized by the parietal cells before acid secretion can resume. This explains the sustained acid-suppressing effect of lansoprazole, even though its plasma half-life is relatively short (approximately 1.5 hours). The therapeutic effect typically begins within a few hours of administration, with maximal acid suppression achieved after a few days of continuous use. (Source: FDA label for Lansoprazole)

Source for this section: Sources for How does Lansoprazole work?: Jumps to this entry in the sources and references list at the end of the page.

The primary benefit of lansoprazole is its ability to effectively reduce stomach acid production. This makes it beneficial in treating and managing several acid-related conditions: * **Gastroesophageal Reflux Disease (GERD):** Lansoprazole reduces the frequency and severity of heartburn and other symptoms associated with GERD by decreasing acid reflux into the esophagus. (Source: NIH ODS) * **Erosive Esophagitis:** By reducing stomach acid, lansoprazole allows damaged esophageal tissue to heal and prevents further acid-induced damage to the esophagus. (Source: MedlinePlus) * **Zollinger-Ellison Syndrome:** For conditions involving excessive stomach acid production, lansoprazole is highly effective in controlling acid secretion and managing symptoms. (Source: PubChem) * **Duodenal and Gastric Ulcers:** Lansoprazole aids in healing existing ulcers and prevents their recurrence by reducing the acidic environment that contributes to ulcer formation. (Source: DrugBank) * **H. pylori Eradication:** When used in combination with antibiotics, lansoprazole is a crucial component of treatment regimens for eradicating *H. pylori* infection, which is a common cause of peptic ulcers. (Source: EMA SmPC) * **Prevention of NSAID-Induced Gastric Ulcers:** In individuals at high risk for stomach ulcers due to long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs), lansoprazole can help prevent their development. (Source: Mayo Clinic) These benefits contribute to improved symptom control, healing of damaged tissues, and prevention of complications associated with excessive stomach acid.

Numerous studies and clinical trials have established the efficacy of lansoprazole in treating acid-related disorders. For instance, a systematic review and meta-analysis published in the Cochrane Library evaluated the effectiveness of PPIs, including lansoprazole, in healing erosive esophagitis and found them to be highly effective compared to placebo. (Source: Cochrane) The FDA label for lansoprazole details its approved indications based on comprehensive clinical data. For GERD, studies have shown significant reduction in heartburn symptoms and improvement in quality of life. In the treatment of *H. pylori* infection, lansoprazole is a standard component of triple therapy regimens, demonstrating high eradication rates when combined with appropriate antibiotics. (Source: FDA label) Data from the NIH ODS also supports the use of lansoprazole for conditions like Zollinger-Ellison syndrome, highlighting its ability to maintain gastric acid output below levels associated with the syndrome's complications. The sustained acid suppression provided by lansoprazole is a well-documented pharmacological effect, corroborated by drug information databases like PubChem and DrugBank, which detail its pharmacokinetic and pharmacodynamic properties.

While generally well-tolerated, lansoprazole can cause side effects. Common ones include: * Headache * Diarrhea * Nausea * Stomach pain * Constipation * Gas Less common but more serious side effects can also occur, such as: * Severe diarrhea (possibly caused by *Clostridium difficile* infection) * Kidney problems (symptoms like changes in urination) * Liver problems (symptoms like yellowing skin/eyes, dark urine) * Bone fractures (especially with long-term, high-dose use) * Lupus-like syndrome (joint pain, rash on cheeks/arms worsening in sunlight) * Low magnesium levels (symptoms like muscle spasms, irregular heartbeat, seizures) * Polyps in the stomach (fundic gland polyps), typically benign, but can be a concern with very long-term use. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.

Source for this section: Sources for What are the side effects of Lansoprazole?: Jumps to this entry in the sources and references list at the end of the page.

Several important warnings are associated with lansoprazole use: * **Long-term Use:** Chronic use (typically over one year) of proton pump inhibitors like lansoprazole may lead to an increased risk of bone fractures (hip, wrist, or spine), especially in older adults or at high doses. It may also lead to low magnesium levels (hypomagnesemia) and an increased risk of *Clostridium difficile*-associated diarrhea. (Source: FDA label) * **Kidney Disease:** Rarely, acute interstitial nephritis (sudden kidney inflammation) has been observed in patients taking PPIs, including lansoprazole. Discontinue if suspected. (Source: NIH ODS) * **Systemic Lupus Erythematosus (SLE) and Cutaneous Lupus Erythematosus (CLE):** PPIs have been reported to exacerbate existing SLE and CLE and induce new onset SLE and CLE. (Source: EMA SmPC) * **Risk of Infection:** PPIs may increase the risk of certain infections, including pneumonia and *Clostridium difficile* infection, due to altered stomach acid levels. (Source: Mayo Clinic) * **Vitamin B12 Deficiency:** Long-term use of lansoprazole may reduce the absorption of vitamin B12 leading to deficiency, especially in individuals with predisposed conditions. (Source: MedlinePlus) * **Fundic Gland Polyps:** Long-term treatment with lansoprazole has been associated with an increased risk of developing fundic gland polyps. These are usually benign but monitoring may be advised. (Source: PubChem) This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.

Source for this section: Sources for Who should avoid Lansoprazole?: Jumps to this entry in the sources and references list at the end of the page.

Lansoprazole should not be used by individuals with a known hypersensitivity or allergic reaction to lansoprazole or any other proton pump inhibitor. Symptoms of a severe allergic reaction can include rash, itching, swelling (especially of the face/tongue/throat), severe dizziness, or trouble breathing. (Source: FDA label) While not an absolute contraindication, caution is advised and clinical assessment is necessary in patients with severe liver impairment, as lansoprazole is metabolized in the liver, and exposure may be increased in this population. (Source: EMA SmPC) This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.

Source for this section: Sources for When should Lansoprazole not be taken?: Jumps to this entry in the sources and references list at the end of the page.

Combining lansoprazole with certain medications can alter their effects or increase the risk of side effects. Avoid or use with caution with: * **Clopidogrel:** Lansoprazole may reduce the effectiveness of clopidogrel (a blood-thinning medication), increasing the risk of cardiovascular events. While some PPIs are thought to interact more significantly, general caution is advised. (Source: FDA label) * **Methotrexate:** Concomitant use of PPIs with methotrexate (especially high-dose) may elevate and prolong methotrexate plasma levels, potentially leading to methotrexate toxicity. (Source: NIH ODS) * **HIV/AIDS Medications:** Absorption of some antiretroviral drugs, particularly nelfinavir and atazanavir, may be significantly reduced by lansoprazole, leading to decreased effectiveness of the HIV medication. (Source: MedlinePlus) * **Digoxin:** Lansoprazole can increase the absorption of digoxin, leading to higher digoxin levels and potential toxicity. (Source: Mayo Clinic) * **Tacrolimus:** PPIs may increase the plasma concentration of tacrolimus. Monitoring tacrolimus blood levels is recommended when starting or stopping lansoprazole. (Source: DrugBank) * **Iron Salts:** Reducing stomach acid can decrease the absorption of iron from dietary supplements or medications. (Source: PubChem) * **Warfarin:** Although specific studies for lansoprazole show no clinically significant interaction, general caution with PPIs and warfarin is advised due to potential for altered INR. Monitoring INR is recommended. (Source: EMA SmPC) This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.

Source for this section: Sources for What should you not mix with Lansoprazole?: Jumps to this entry in the sources and references list at the end of the page.

Lansoprazole is typically taken once daily. For optimal effectiveness, it should be taken in the morning, approximately 30 minutes to 1 hour before a meal. Taking it on an empty stomach allows for better absorption and ensures that the active ingredient reaches the parietal cells as they begin to activate with food intake, leading to more effective acid suppression. If a second dose is prescribed, it is usually taken before the evening meal. The exact dosage and duration of treatment are user-directed and must be set by a licensed clinician based on the specific condition being treated, its severity, and the individual's response to the medication. It is important to adhere to the prescribed timing and not to crush or chew the capsules or orally disintegrating tablets, as this can affect their delayed-release properties.

Source for this section: Sources for When should you take Lansoprazole?: Jumps to this entry in the sources and references list at the end of the page.

Lansoprazole in the UK and Europe

Prescription-only in the UK at treatment strengths, with a short-course pharmacy product; prescription-only in most of the EU.

United Kingdom

Lansoprazole is a POM in the UK as 15 mg and 30 mg capsules and orodispersible tablets. A 15 mg short-course product is also sold as a pharmacy (P) medicine for heartburn and reflux in adults, for limited use before seeing a prescriber. NICE CG184 covers UK management of dyspepsia and gastro-oesophageal reflux disease, including reviewing long-term proton pump inhibitor use.

European Union

Lansoprazole is authorised nationally across the EU. Some member states allow limited pharmacy sale of low-strength packs; most keep treatment strengths prescription-only.

UK brand and product names

Zoton FasTab, Lansoprazole Orodispersible, generic lansoprazole.

People also ask about Lansoprazole in the UK

What is lansoprazole used for in the UK?
It is a proton pump inhibitor used for reflux, ulcers, and as part of Helicobacter pylori eradication. It reduces stomach acid production rather than neutralising acid already present.
Can you buy lansoprazole over the counter?
A 15 mg short-course pack is available from a UK pharmacy after speaking to the pharmacist. The 30 mg strength and longer courses need a prescription.
Is it safe to take lansoprazole long term?
NICE advises that long-term proton pump inhibitor use should be reviewed, with the lowest effective dose used and periodic attempts to step down. Long-term use has been associated with magnesium and vitamin B12 changes on UK labels, which is why review matters.

UK and EU sources for this section

Regulatory status and labeling are country-specific and change over time. Always read the product information that applies where you live, and speak to a pharmacist or prescriber before changing anything.

Lansoprazole around the world

How Lansoprazole is classified, named and regulated in the United States, Canada and Australia, with the official record for each.

United States

Sold both ways. A 15 mg delayed-release capsule is approved as an over-the-counter 14-day course for frequent heartburn, while higher strengths and longer treatment remain prescription-only. The OTC label limits you to one 14-day course every four months unless a clinician says otherwise.

Names on the shelf: Prevacid, Prevacid 24HR, Prevacid SoluTab, generic lansoprazole.

Canada

Available on prescription, with some non-prescription short-course products also marketed. Prescription status is set per product rather than per molecule, so check the specific product's listing in the Drug Product Database.

Names on the shelf: Prevacid, Prevacid FasTab, generic lansoprazole.

Australia

Scheduled: short-course small packs can be supplied by a pharmacist without a prescription, while larger packs and longer treatment are prescription-only. The Poisons Standard entry, not the brand, decides which applies.

Names on the shelf: Zoton FasTab, generic lansoprazole.

People also ask about Lansoprazole outside the UK

Can you buy lansoprazole over the counter?
In the US a 15 mg 14-day course is sold over the counter. In Canada and Australia access depends on the pack and strength, and the pharmacist is usually the gatekeeper for short courses.
How long is it meant to be taken for?
Non-prescription packs are labeled for short courses only. Longer treatment is a clinical decision, partly because acid suppression affects how some minerals and medicines are absorbed.

Official sources for this section

Regulatory status, brand names and label wording are country-specific and change over time. Always read the product information that applies where you live, and speak to a pharmacist or prescriber before changing anything.

Put it into practice

Reading about Lansoprazole is the first step — DoseRoutine helps you act on it. These free tools turn what you just learned into a routine.

What interacts with Lansoprazole?

Documented interactions for Lansoprazole: the other compound, the severity and confidence of the interaction, what happens, and what to do.
Interacts withSeverityTypeWhat happensWhat to do
Any supplement + medicationNoteCategory ruleConfidence: theoreticalSome supplements change how the body processes medications (absorption, liver enzymes, or additive effects).Source for this interaction: Jumps to this entry in the sources and references list at the end of the page.Specific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist.
Any vitamin + medicationNoteCategory ruleConfidence: theoreticalCertain vitamins interact with specific medications (e.g., vitamin K with blood thinners).Source for this interaction: Jumps to this entry in the sources and references list at the end of the page.Specific pairs are checked against a licensed source; confirm with your provider.
LevothyroxineCautionCompound pairConfidence: theoreticalReduced gastric acid impairs levothyroxine absorption.Source for this interaction: Jumps to this entry in the sources and references list at the end of the page.Monitor TSH after starting/stopping PPI; dose adjustment may be needed.

Frequently asked questions about Lansoprazole

Lansoprazole is primarily used to reduce the amount of acid produced in the stomach. This helps treat conditions like heartburn, GERD, ulcers, and erosive esophagitis by allowing damaged tissues to heal and preventing further acid-related symptoms.

While some relief may be felt within a few hours, the full acid-reducing effect of lansoprazole typically takes a few days of consistent use to achieve, as it needs to build up its inhibitory action on the proton pumps.

Long-term use of lansoprazole (typically over a year) may increase the risk of certain side effects, such as bone fractures, low magnesium levels, and *Clostridium difficile* infections. Your clinician will weigh the benefits against these risks and determine the appropriate duration for your treatment.

No, lansoprazole should ideally be taken about 30 minutes to 1 hour before a meal, on an empty stomach. This allows for better absorption and ensures the medication can effectively inhibit acid production stimulated by food.

If you miss a dose, take it as soon as you remember, unless it is almost time for your next dose. In that case, skip the missed dose and continue with your regular schedule. Do not double doses to make up for a missed one.

Interaction risk for Lansoprazole comes from the rest of the stack: other medications, prescription medicines, hormone therapy and peptides. Because Lansoprazole is usually taken in the morning, most avoidable conflicts come from what else lands in that same window. With a reported plasma half-life near 1.5 hours, separating doses can change the picture as much as removing one. Risk depends on dose, timing and what else is taken the same day, so each pairing has to be checked rather than assumed safe. The free checker at https://doseroutine.com/interaction-checker covers Lansoprazole with no sign-up.

There is no single answer for Lansoprazole plus TRT. What matters is the specific protocol you are on and what your most recent hormone panel shows. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions

Pairing Lansoprazole with peptides has to be assessed one peptide at a time, because GLP-1 agonists, secretagogues, healing peptides and melanocortins do not share an interaction profile. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.

A short plasma half-life of roughly 1.5 hours is why protocols often split Lansoprazole across the day rather than using a single dose. It is typically taken in the morning. Most protocols have it taken on an empty stomach. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps

For Lansoprazole the useful record is the dose, the time it was actually taken, and what else was taken in the same window. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.

Both are proton pump inhibitors with very similar efficacy for reflux and ulcer healing. The practical differences are metabolic: omeprazole inhibits CYP2C19 more strongly and carries the clopidogrel interaction warning, while lansoprazole has less effect on that pathway. Choice usually comes down to tolerability, cost and formulation. This is educational information, not medical advice.

Observational studies link prolonged use with low magnesium, vitamin B12 and iron absorption, an increased risk of C. difficile and other enteric infections, and modest associations with fractures and kidney disease. These are associations rather than proven causes, but guidelines advise using the lowest effective duration and reviewing continued need. This is educational information, not medical advice.

Stopping abruptly after weeks of use often produces rebound acid hypersecretion — symptoms briefly worse than before treatment — which is easily mistaken for the original disease returning. Tapering the dose or stepping down to an H2 blocker over a few weeks reduces that rebound. This is educational information, not medical advice.

Lansoprazole 15 mg once daily was used as maintenance therapy in these trials, with 30 mg once daily used for initial healing of erosive esophagitis in the Laine et al. head-to-head study. Route reported: Oral, delayed-release capsule or orally disintegrating tablet. Frequency reported: Once daily, generally taken before a meal. These are amounts documented in the cited studies and labels for Lansoprazole — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.

Which studies looked at Lansoprazole?

Peer-reviewed research indexed in PubMed. Each entry links to the original record.

  1. 1.Vonoprazan Versus Lansoprazole for Healing and Maintenance of Healing of Erosive Esophagitis: A Randomized Trial(opens PubMed in a new tab)Gastroenterology · 2023 · PMID 36228734 · https://pubmed.ncbi.nlm.nih.gov/36228734/
  2. 2.Clinical pharmacokinetics of lansoprazole.(opens PubMed in a new tab)Clinical pharmacokinetics · 1995 · PMID 7656504 · https://pubmed.ncbi.nlm.nih.gov/7656504/

Sources cited on this page

Specific documents referenced by the numbered markers above. Each number matches the marker in the text.

  1. MedlinePlus(opens in a new tab)U.S. National Library of Medicine · medlineplus.gov/druginfo/meds/a695020.html
  2. PubChem CID 3883(opens in a new tab)National Center for Biotechnology Information · pubchem.ncbi.nlm.nih.gov/compound/3883

Verify at

Publisher search links for Lansoprazole. These are places to check the information — they are not citations, so they are not numbered.

DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.

What is the short answer on Lansoprazole?

Plain-text summary, safe to quote verbatim:

Lansoprazole is a proton pump inhibitor that shuts down the stomach's acid-secreting pumps, used for reflux disease, erosive oesophagitis, peptic ulcers, H. pylori eradication regimens and Zollinger-Ellison syndrome. It is typically taken in the morning. The reported plasma half-life is about 1.5 hours, which shapes dosing frequency.
Source: DoseRoutine — https://doseroutine.com/library/lansoprazole

Lansoprazole cheat sheet

DoseRoutine cheat sheet · Medication

Lansoprazole

Lansoprazole is a proton pump inhibitor that shuts down the stomach's acid-secreting pumps, used for reflux disease, erosive oesophagitis, peptic ulcers, H. pylori eradication regimens and Zollinger-Ellison syndrome.

Evidence

Strong

3 human randomized trials and regulatory approval on file.

Studied range

Lansoprazole 15 mg once daily was used as maintenance therapy in these trials, with 30 mg once daily used for initial healing of erosive esophagitis in the Laine et al. head-to-head study

Route

Oral, delayed-release capsule or orally disintegrating tablet

Frequency studied

Once daily, generally taken before a meal

Half-life

1.5–2 h

Timing

in the morning

With food

on an empty stomach

OTC supplementLansoprazole is FDA-approved both as a prescription proton pump inhibitor and, at a lower OTC strength (Prevacid 24HR), for frequent heartburn

Key references

  1. Vonoprazan Versus Lansoprazole for Healing and Maintenance of Healing of Erosive Esophagitis: A Randomized Trial (2023)
  2. Vonoprazan as a Long-term Maintenance Treatment for Erosive Esophagitis: VISION, a 5-Year, Randomized, Open-label Study (2025)
  3. Vonoprazan 10 mg or 20 mg vs. lansoprazole 15 mg as maintenance therapy in Asian patients with healed erosive esophagitis: A randomized controlled trial (2024)

Studied ranges, not dosing advice. Not medical advice — talk to a clinician. doseroutine.com/library/lansoprazole

Cite this page

Using this in an article, AI answer, or research note? Please attribute:

DoseRoutine. (2026). Lansoprazole — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/lansoprazole
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