Lansoprazole to reduce stomach acid
Zoton FasTab, Prevacid
Revisado por Sid DajaniÚltima actualización por Michael Stewart, MRPharmSÚltima actualización 4 Jul 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.
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About lansoprazole
Tipo de medicamento | Proton pump inhibitor |
Utilizado para | Gastric ulcer; duodenal ulcer; gastro-oesophageal reflux disease; Helicobacter pylori infection; Zollinger-Ellison syndrome; acid-related dyspepsia |
También llamado (UK) | Zoton FasTab® |
También llamado (EE.UU.) | Prevacid®; Prevacid SoluTab® |
Disponible como | 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 'acid reflux'.
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, a bacterium found in the stomach, which can cause ulcers.
Before taking lansoprazole
Some 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:
Si está embarazada, esperando un bebé o en período de lactancia.
Si tiene algún problema con el funcionamiento de su hígado.
Si tiene alguno de los siguientes síntomas: dificultad para tragar, pérdida de sangre, pérdida de peso o si se encuentra mal (vómitos).
Si alguna vez ha tenido una reacción alérgica a un medicamento.
Si está tomando otros medicamentos. Esto incluye cualquier medicamento que esté tomando y que pueda adquirirse sin receta, así como medicamentos a base de plantas y complementarios.
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How to take lansoprazole
Before 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.
Aproveche al máximo su tratamiento
Try 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.
Algunos alimentos pueden empeorar los síntomas. Entre los alimentos y bebidas de los que se sospecha que pueden agravarlos se encuentran la menta, los tomates, el chocolate, los alimentos picantes, las bebidas calientes, el café y las bebidas alcohólicas. Si parece que un alimento está agravando sus síntomas, intente evitarlo durante un tiempo para ver si mejoran. Asimismo, evite las comidas copiosas, ya que también pueden empeorar los síntomas.
El sobrepeso ejerce una presión adicional sobre el estómago y favorece los síntomas del reflujo ácido. Perder algo de peso y seguir una dieta sana y equilibrada puede ayudarte.
Fumar aumenta la cantidad de ácido producido por el estómago y puede empeorar sus síntomas. Si es fumador, hable con su médico o farmacéutico sobre cómo dejar de fumar.
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?
Along 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.
Común lansoprazole side-effects (these affect fewer than 1 in 10 people) | ¿Qué puedo hacer si me ocurre esto? |
Stomach upset (such as feeling sick (nausea), stomach ache, or wind) | Comidas sencillas: evite los alimentos ricos o picantes. |
Diarrea | Drink plenty of water. If it continues or becomes severe, let your doctor know |
Estreñimiento | Intenta seguir una dieta equilibrada y beber varios vasos de agua al día. |
Dolor de cabeza | Bebe mucha agua y pide a tu farmacéutico que te recomiende un analgésico adecuado. Si los dolores de cabeza persisten, informe a su médico. |
Sensación de mareo o cansancio | No conduzca ni utilice herramientas o máquinas hasta que se sienta mejor. |
Dry mouth or throat, itchy skin rash | Si alguno de estos síntomas le resulta molesto, comuníqueselo a su médico |
Important: 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.
Si experimenta cualquier otro síntoma que considere que puede deberse al medicamento, consulte a su médico o farmacéutico.
How to store lansoprazole
Mantenga todos los medicamentos fuera del alcance y de la vista de los niños.
Almacenar en un lugar fresco y seco, lejos del calor y la luz directos.
Información importante sobre todos los medicamentos
Información importante sobre todos los medicamentos
No tome nunca más de la dosis prescrita. Si sospecha que usted u otra persona ha tomado una sobredosis de este medicamento, acuda al servicio de urgencias de su hospital. Llévese el envase, aunque esté vacío.
Este medicamento es para usted. Nunca se lo dé a otras personas aunque su enfermedad parezca ser la misma que la suya.
Si va a someterse a una operación o a un tratamiento dental, comunique a la persona que lleve a cabo el tratamiento qué medicamentos está tomando.
No guarde medicamentos caducados o que no desee. Llévelos a su farmacia local, que se encargará de eliminarlos por usted.
Si tiene cualquier duda sobre este medicamento pregunte a su farmacéutico.
Informar de los efectos secundarios de un medicamento o vacuna
Si experimenta efectos secundarios, puede notificarlos en línea a través del sitio web de la Tarjeta Amarilla.
Lecturas complementarias y referencias
- 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.
- Medicamentos BNF completa 89ª edición; Asociación Médica Británica y Real Sociedad Farmacéutica de Gran Bretaña, Londres.
Historia del artículo
La información de esta página ha sido redactada y revisada por médicos cualificados.
Fecha de la próxima revisión: 3 jul 2026
4 Jul 2023 | Última versión

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