Proton Pump Inhibitors

    Lansoprazole

    Lansoprazole (generic Prevacid) is a proton pump inhibitor for reflux, ulcers and H. pylori. Prescription capsules and SoluTab dissolving tablets are generic, and the 15 mg dose is also sold over the counter, which matters if you pay cash for that strength.

    Written by the Script Unlock editorial teamLast updated October 7, 2026Not yet reviewed by an independent pharmacist

    This page is general information about a medication and how cash prices for it are set. It is not medical advice and does not replace the label, your prescriber or your pharmacist. How we handle medical information

    Brand names
    Prevacid
    Generic available in the US
    Yes
    Dosage forms
    Delayed-release capsules; Orally disintegrating tablets (SoluTab); Over-the-counter capsules and dissolving tablets
    Strengths on US labels
    15 and 30 mg capsules; 15 and 30 mg dissolving tablets; 15 mg over the counter
    Commonly prescribed for
    GERD, Duodenal Ulcers, H. pylori Infection

    Capsules have many generic makers and the dissolving tablets several; brand Prevacid 30 mg capsules and SoluTab are still sold.

    About Lansoprazole

    Lansoprazole switches off the acid pumps in the stomach lining. It treats reflux and erosive esophagitis in adults and children from one year old, heals stomach and duodenal ulcers, lowers the risk of ulcers from NSAIDs, controls Zollinger-Ellison syndrome and, with antibiotics, helps clear H. pylori. Adults usually take 15 mg once a day for reflux and 30 mg for erosive esophagitis.

    Diarrhea, stomach pain, nausea and constipation are the most common side effects. Long-term use is linked to low magnesium and vitamin B12 and to fractures; C. difficile diarrhea, kidney inflammation, lupus and severe skin reactions are less common. It must not be taken with the HIV drug rilpivirine, and the SoluTab contains phenylalanine, which matters in phenylketonuria.

    Over the counter, 15 mg is sold as Prevacid 24HR and as store-brand capsules and dissolving tablets for frequent heartburn, taken each morning for 14 days, no more than one course every four months without a doctor’s advice. If you are prescribed 15 mg once a day, the over-the-counter product is the same medicine and strength without a dispensing fee; whether it can replace your prescription is your prescriber’s decision.

    No FDA-approved lansoprazole oral suspension is on the US market now: Prevacid’s suspension packets are discontinued. For people who cannot swallow a capsule, the label allows it to be opened onto soft food or into juice, and the SoluTab to be dissolved in water for an oral syringe. Prevpac, the brand H. pylori pack, is discontinued too.

    Taking Lansoprazole

    How to take it
    Usually once a day before a meal, or two or three times a day with antibiotics for H. pylori. Swallow capsules whole, or sprinkle the granules on a tablespoon of applesauce or stir them into about 60 mL of apple, orange or tomato juice and swallow at once. Let the SoluTab dissolve on the tongue. Take it at least 30 minutes before sucralfate.
    If you miss a dose
    Take it as soon as you remember, unless the next dose is nearly due; then skip the missed one. Do not take a double dose.
    Storage
    At room temperature, tightly closed, away from heat and moisture (not in the bathroom), out of reach of children.
    Interactions to know about
    It must not be taken with rilpivirine; nelfinavir, St. John’s wort and rifampin are avoided. It can raise digoxin, tacrolimus and high-dose methotrexate levels and the INR on warfarin, theophylline may need adjusting, and it can reduce iron absorption. Antacids can be taken with it.

    This summarizes the official prescribing information. Your prescriber’s and pharmacist’s instructions, and the leaflet that comes with your medicine, take priority.

    Why the cash price for Lansoprazole differs from pharmacy to pharmacy

    Generic capsules have many makers, so a fill is priced mostly on each pharmacy’s dispensing fee and markup. The dissolving tablets have fewer makers and their quotes vary more, and a prescription naming Prevacid or SoluTab without allowing substitution is priced as a brand.

    Over-the-counter 15 mg products carry no dispensing fee; there is no 30 mg over-the-counter product.

    Have a Lansoprazole prescription?

    Upload it and licensed pharmacies reply with their own cash price. You pay the pharmacy, not us.

    Get quotes

    Ways to pay less for Lansoprazole without insurance

    • If you take 15 mg once a day, ask your prescriber whether the over-the-counter product would do, and for how long.
    • Ask for the prescription to allow generic substitution.
    • If the SoluTab was chosen only for easier swallowing, ask whether an opened capsule on applesauce would do.
    • For H. pylori, ask the pharmacy to quote lansoprazole and the antibiotics as separate generics.
    • Upload the prescription to Script Unlock so licensed pharmacies can quote their cash price. You pay the pharmacy directly.

    How Script Unlock gets you a cash price for Lansoprazole

    Prices on this site come from pharmacies responding to a real prescription. We do not publish estimated, average or "typical" prices, because none of those would be your price.

    1. 1You upload your prescription

      A photo of your Lansoprazole prescription is enough. Nothing is sold on the site; you are asking pharmacies to quote.

    2. 2Licensed pharmacies respond

      Pharmacies that Script Unlock has verified see the request and each can reply with its own cash price for your exact drug, strength and quantity.

    3. 3You choose and pay the pharmacy

      You compare the responses, pick a pharmacy, and pay that pharmacy directly when you collect. Script Unlock never takes a patient payment and never sets the price.

    Questions to ask your pharmacist about Lansoprazole

    1. 1.Is over-the-counter 15 mg the same as my prescription?
    2. 2.How long before a meal should I take it?
    3. 3.Can I open the capsule if swallowing is hard?
    4. 4.Does it interact with my blood thinner, methotrexate or HIV medicines?
    5. 5.How long should I stay on it?

    Where Lansoprazole fits

    Sources

    Script Unlock is a marketplace that lets licensed pharmacies quote a cash price on your prescription. It does not prescribe, dispense or sell medication, does not process patient payments, and does not give medical advice. Always follow the instructions of your prescriber and pharmacist and read the medication guide supplied with your medicine.