Lansoprazole to reduce stomach acid
Zoton FasTab, Prevacid
Revisione paritaria di Sid DajaniUltimo aggiornamento di Michael Stewart, MRPharmSUltimo aggiornamento 4 Lug 2023
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Lansoprazole reduces the amount of acid produced in your stomach.
Take your doses 30 minutes before breakfast when your stomach is empty. If you are asked to take two doses daily, take your first dose 30 minutes before breakfast and your second dose in the evening.
The most common side-effects are stomach upset and headache. These effects are generally mild and do not last long.
At a glance
Lansoprazole is a medicine known as a proton pump inhibitor.
It reduces the amount of acid produced in your stomach.
It is used to treat conditions like stomach ulcers and acid reflux.
Take lansoprazole at least 30 minutes before a meal, usually breakfast.
Common side-effects can include stomach upset, diarrhoea, and headache.
If you are pregnant, breastfeeding, or have certain symptoms, tell your doctor.
Long-term use may slightly increase the risk of bone fractures and low magnesium.
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About lansoprazole
Tipo di medicinale | Inibitore della pompa protonica |
Utilizzato per | Gastric ulcer; duodenal ulcer; gastro-oesophageal reflux disease; Helicobacter pylori infection; Zollinger-Ellison syndrome; acid-related dyspepsia |
Chiamato anche (UK) | Zoton FasTab® |
Chiamato anche (USA) | Prevacid®; Prevacid SoluTab® |
Disponibile come | Capsules, orodispersible (melt-in-the-mouth) tablets |
Acid is produced naturally in your stomach to help you digest food and to kill bacteria. This acid is irritant so your body produces a natural mucous barrier which protects the lining of your stomach. In some people, this barrier can break down allowing the acid to damage the stomach, causing inflammation, ulcers and other conditions. Other people can have a problem with the muscular band at the top of the stomach that keeps the stomach tightly closed. This may allow the acid to escape and irritate the oesophagus, causing heartburn. This is often referred to as 'reflusso acido'.
Proton pump inhibitors such as lansoprazole stop cells in the lining of the stomach from producing too much acid. This helps to prevent ulcers from forming, or assists the healing process where damage has already occurred. By decreasing the amount of acid, they can also help to reduce the symptoms of acid reflux disease, such as heartburn.
Lansoprazole is also given as one part of a treatment to get rid of Helicobacter pylori, un batterio presente nello stomaco, che può causare ulcere.
Before taking lansoprazole
Torna ai contenutiSome medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you start taking lansoprazole it is important that your doctor or pharmacist knows:
Se sei incinta, stai cercando di avere un bambino o stai allattando.
Se hai problemi con il funzionamento del tuo fegato.
Se hai uno dei seguenti sintomi: difficoltà a deglutire, perdita di sangue, perdita di peso, o se stai vomitando.
Se hai mai avuto una reazione allergica a un medicinale.
Se stai assumendo altri medicinali. Questo include qualsiasi medicinale che stai assumendo e che è disponibile per l'acquisto senza prescrizione medica, così come i medicinali a base di erbe e complementari.
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How to take lansoprazole
Torna ai contenutiBefore you start this treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about lansoprazole and will provide you with a full list of the side-effects which you may experience from taking it.
Take lansoprazole exactly as your doctor tells you to. There are different strengths of tablets and capsules available so your doctor will tell you which is right for you. It is usually taken once a day in the morning. If you are taking it for either Helicobacter pylori eradication or for Zollinger-Ellison syndrome, it is likely you will be asked to take two doses a day. Your doctor will tell you which dose is right for you and the directions will also be on the label of the pack to remind you.
Lansoprazole should be taken at least 30 minutes before a meal, which is usually breakfast. This is because your body absorbs less lansoprazole after you have eaten a meal, so the medicine is less effective. If you have been asked to take two doses daily, take your first dose 30 minutes before breakfast and your second dose in the evening.
If you have been given capsules to take, swallow the capsule with a drink of water. Do not chew, crush or open the capsule before you swallow.
If you have been given orodispersible tablets (Zoton FasTabs®), you can swallow the tablet with a drink of water as usual, or you can place it on your tongue and allow it to 'melt' there before you swallow. Alternatively, you can stir it into a small amount of water to take it.
Do not take indigestion remedies during the two hours before or during the two hours after you take lansoprazole as they can interfere with the way lansoprazole is absorbed by your body.
If you forget to take a dose at your usual time, you can take it when you remember (unless it is nearly time for your next dose, in which case leave out the missed dose). Do not take two doses at the same time to make up for a forgotten dose.
Ottenere il massimo dal tuo trattamento
Torna ai contenutiTry to keep your regular appointments with your doctor. This is so your progress can be checked. If you are taking lansoprazole on a long-term basis your doctor will want to review your treatment at least once a year to make sure it is still right for you.
Typical courses of treatment last for one or two weeks if you are taking lansoprazole for Helicobacter pylori eradication. If you are taking it for acid-related dyspepsia, your treatment will typically last for two to four weeks. It will last for around one or two months if it is for an ulcer. For acid reflux or Zollinger-Ellison syndrome, your treatment will last for as long as is necessary to control your symptoms.
Some foods may make your symptoms worse. Foods and drinks that have been suspected of this include peppermint, tomatoes, chocolate, spicy foods, hot drinks, coffee, and alcoholic drinks. If it seems that a food is aggravating your symptoms, try avoiding it for a while to see if your symptoms improve. Also, try avoiding eating large meals, as these can make your symptoms worse too.
Se sei in sovrappeso, esercita una pressione extra sullo stomaco e incoraggia i sintomi del reflusso acido. Perdere un po' di peso e seguire una dieta sana ed equilibrata potrebbe aiutarti.
Fumare aumenta la quantità di acido prodotto dallo stomaco e può peggiorare i tuoi sintomi. Se sei un fumatore, parla con il tuo medico o farmacista su come smettere.
Recent studies suggest that there may be a slight increase in the risk of bone fractures when proton pump inhibitors like lansoprazole are taken for longer than a year. If this affects you, your doctor will check that you are taking enough vitamin D and calcium to reduce this risk.
If you buy any medicines 'over-the-counter', always check with a pharmacist that they are safe to take alongside your other medicines.
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Can lansoprazole cause problems?
Torna ai contenutiAlong with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the most common ones associated with lansoprazole. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.
Common lansoprazole side-effects (these affect fewer than 1 in 10 people) | Cosa posso fare se sperimento questo? |
Stomach upset (such as feeling sick (nausea), stomach ache, or wind) | Attieniti a pasti semplici - evita cibi ricchi o piccanti |
Diarrea | Bevi molta acqua. Se continua o diventa grave, informa il tuo medico |
Costipazione | Cerca di seguire una dieta equilibrata e bevi diversi bicchieri d'acqua ogni giorno |
Mal di testa | Bevi molta acqua e chiedi al tuo farmacista di consigliarti un antidolorifico adatto. Se i mal di testa persistono, informa il tuo medico |
Sensazione di vertigini o stanchezza | Non guidare e non utilizzare strumenti o macchinari finché non ti senti meglio |
Dry mouth or throat, itchy skin rash | Se uno di questi diventa problematico, informa il tuo medico |
Importante: long-term use of lansoprazole (for at least three months) may lead to low levels of magnesium in your blood. Initial signs this might be happening include feeling tired, dizzy or confused and an irregular heartbeat (palpitations). Let your doctor know if you think this applies to you.
Se si verificano altri sintomi che ritieni possano essere dovuti al medicinale, parla con il tuo medico o farmacista per ulteriori consigli.
How to store lansoprazole
Torna ai contenutiTenere tutti i medicinali fuori dalla portata e dalla vista dei bambini.
Conservare in un luogo fresco e asciutto, lontano da fonti di calore e luce diretta.
Informazioni importanti su tutti i medicinali
Torna ai contenutiInformazioni importanti su tutti i medicinali
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Domande frequenti
What is the main role of lansoprazole in my body?
Lansoprazole works by stopping the cells in the lining of your stomach from producing too much acid. This action helps to prevent ulcers, heal existing damage, and reduce symptoms like heartburn caused by acid reflux.
Are there specific times of day I should take lansoprazole?
Lansoprazole is usually taken once a day in the morning, at least 30 minutes before a meal, ideally breakfast. If you are instructed to take two doses daily, take the first dose 30 minutes before breakfast and the second dose in the evening.
Can I take indigestion remedies if I'm on lansoprazole?
It's best to avoid taking indigestion remedies during the two hours before or two hours after you take lansoprazole. This is because they can interfere with how lansoprazole is absorbed by your body, making it less effective.
How long will I need to take lansoprazole?
The duration of your treatment depends on your condition. For Helicobacter pylori eradication, it typically lasts one or two weeks. For acid-related dyspepsia, it's usually two to four weeks. If it's for an ulcer, treatment might last one or two months. For acid reflux or Zollinger-Ellison syndrome, you may need to take it for as long as necessary to control your symptoms.
Could lansoprazole affect my bones?
Recent studies suggest a slight increase in the risk of bone fractures if proton pump inhibitors like lansoprazole are taken for longer than a year. If this might affect you, your doctor will check that you are getting enough vitamin D and calcium to minimise this risk.
What should I do if I forget a dose of lansoprazole?
If you miss a dose at your usual time, you can take it as soon as you remember, unless it's almost time for your next scheduled dose. In that case, skip the missed dose and continue with your regular schedule. Do not take two doses together to make up for a forgotten dose.
What are some common mild side effects and how can I manage them?
Common mild side effects can include stomach upset such as nausea or stomach ache (try sticking to simple meals, avoiding rich or spicy foods); diarrhoea (drink plenty of water); constipation (eat a well-balanced diet and drink several glasses of water); and headache (drink plenty of water and consider an over-the-counter painkiller recommended by your pharmacist). If any of these become troublesome or continue, you should speak with your doctor or pharmacist.
Ulteriori letture e riferimenti
- Manufacturer's PIL, Zoton® FasTab; Pfizer Ltd, The electronic Medicines Compendium. Dated November 2022.
- Manufacturer's PIL, Lansoprazole 15 mg and 30 mg Gastro-resistant Capsules; Krka UK Ltd, The electronic Medicines Compendium. Dated January 2020.
- Medicinali Completi BNF 89ª Edizione; Associazione Medica Britannica e Società Farmaceutica Reale di Gran Bretagna, Londra.
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About the authorView full bio

Michael Stewart, MRPharmS
Medicine Leaflet Review Manager – Contractor, Pharmacist
BPharm (Hons), MRPharmS
Michael is a community pharmacist practicing in the Midlands and South Yorkshire with more than 20 years’ experience advising on medicines and medical conditions. He has a strong background in healthcare training, having produced and delivered training courses for pharmacy teams and staff of residential care settings, including nurses. He has also contributed to pharmacy advisory boards for the management of low acuity conditions in the community.
About the reviewer

Sid Dajani
Sultan Dajani qualified at the London School of Pharmacy in 1994 and became the youngest elected member of the Royal Pharmaceutical Society council since its founding in 1842.
Storia dell'articolo
Le informazioni su questa pagina sono scritte e revisionate da clinici qualificati.
Prossima revisione prevista: 3 lug 2026
4 Lug 2023 | Ultima versione

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