Ir al contenido principal

Lactulosa para el estreñimiento

Lactulose can take up to 48 hours to have an effect.

If you find the medicine makes you feel queasy, mix your dose with some water or fruit juice. Alternatively, take your doses with a meal.

Comer una dieta saludable, beber mucha agua y hacer ejercicio suave regularmente pueden ayudar a prevenir el estreñimiento.

De un vistazo

  • Lactulose is an osmotic laxative used to treat constipation.

  • It works by drawing fluid into the bowel, making stools softer and easier to pass.

  • Lactulose can take up to 48 hours to start working.

  • Tell your doctor if you have a bowel blockage or if it's for a child.

  • Common side-effects include wind, stomach discomfort, or feeling sick.

  • Speak to your doctor if your constipation does not improve after several days.

Find relief from constipation

Reciba asesoramiento sanitario experto desde la comodidad de su hogar. Complete una consulta rápida en línea, disponible las 24 horas del día, los 7 días de la semana, y un profesional sanitario colegiado en el Reino Unido revisará su solicitud. Hay entrega al día siguiente disponible para los tratamientos que cumplan los requisitos.

About lactulose

Tipo de medicamento

An osmotic laxative

Usado para

Estreñimiento

Disponible como

Oral liquid medicine, liquid sachets

Estreñimiento is a common problem. It can mean either going to the toilet less often than usual to empty your bowels, or passing hard or painful stools. Constipation can be caused by a number of things. Not eating enough fibre or not drinking enough fluid can cause constipation. Some conditions (such as pregnancy) can cause constipation, as can a lack of exercise or movement (such as being ill in bed) and some medicines.

Often, increasing the amount of fibre in your diet (such as by eating more fruit, vegetables, cereals, and wholemeal bread) and drinking plenty of water each day can effectively prevent or relieve constipation. You will have been recommended lactulose, a laxative, to help relieve constipation if you cannot increase the fibre in your diet or if this is insufficient. Lactulose works by drawing fluid into your bowel, which makes your stools softer and easier to pass. It is available on prescription, and it can also be bought without a prescription at pharmacies.

Lactulose also changes the acidity of the stools and this helps to discourage the growth of some germs (bacteria) present in the bowel. Because of this, lactulose is also prescribed for people with a liver disease called hepatic encephalopathy. If you have been prescribed it for this reason, ask your doctor if you need further information about the medicine.

Before taking lactulose

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 lactulose it is important that your doctor or pharmacist knows:

  • Si estás tan estreñido que crees que puedes tener una obstrucción.

  • If you are unable to digest milk sugar (lactose intolerant).

  • If you have a condition called galactosaemia, where your body cannot process galactose.

  • If you are pregnant or breastfeeding. Lactulose is not known to be harmful to a baby, but while you are expecting or feeding a baby, you should only take medicines on the recommendation of a doctor.

  • If it is intended for a child. This is because laxatives should only be given to children on the advice of a doctor or healthcare professional.

  • Si está tomando otros medicamentos, incluidos aquellos que se pueden comprar sin receta, así como medicamentos herbales y complementarios.

  • If you have ever had an allergic reaction to this or to any other medicine.

How to take lactulose

  • Before you start the treatment, read the manufacturer's printed information leaflet from the pack. It will give you more information about lactulose and will provide you with a full list of the side-effects which you may experience.

  • Take lactulose exactly as your doctor tells you to, or as directed on the pack. The usual dose for constipation in an adult is 15 ml (three 5 ml spoonfuls) twice daily, although the dose you are advised to take may be different from this as it will be adjusted to suit your needs.

  • If a doctor or healthcare professional has recommended lactulose for your child, check the label on the pack carefully to make sure that you give the correct dose for the age of your child.

  • Si olvida tomar una dosis, no se preocupe, simplemente tome la siguiente dosis cuando corresponda. No tome dos dosis juntas para compensar una dosis olvidada.

Obteniendo el máximo de tu tratamiento

  • Lactulose can take up to 48 hours to act, so it may take two or three days before you feel the full benefit. However, if after several days you do not feel your symptoms are improving, or if they get worse, you should speak with a doctor for further medical advice.

  • It is important for you to drink plenty while you are constipated. Adults should aim to drink at least two litres (about 8-10 cups) of fluid per day. Most sorts of drink will do, but as a start, try just drinking a glass of water 3-4 times a day in addition to what you normally drink.

  • Intenta comer una dieta equilibrada que contenga alimentos ricos en fibra, como panes y cereales integrales, frutas y verduras, arroz integral y pasta integral. Si no estás acostumbrado a una dieta alta en fibra, puede ser mejor aumentar la cantidad de fibra que consumes gradualmente.

  • Mantener tu cuerpo activo te ayudará a mantener en movimiento tu sistema digestivo, así que intenta hacer ejercicio diario de forma regular.

  • Puede que desee incluir en su dieta algunos alimentos que contengan sorbitol. El sorbitol es un azúcar que se encuentra de forma natural. No se digiere muy bien y atrae agua al intestino, lo que ayuda a ablandar las heces. Entre las frutas (y sus zumos) con un alto contenido de sorbitol se encuentran las manzanas, los albaricoques, las grosellas espinosas, las uvas (y las pasas), los melocotones, las peras, las ciruelas, las ciruelas pasas, las frambuesas y las fresas.

  • You can read more about how to prevent or treat constipation in the separate health information leaflets called Estreñimiento (for adults) and Estreñimiento en Niños.

Can lactulose 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 ones which can occur with lactulose. You will find a full list in the manufacturer's information leaflet supplied with your medicine. Speak with your doctor or pharmacist if any of the following continue or become troublesome.

Lactulose side-effects

¿Qué puedo hacer si experimento esto?

Excess wind (flatulence), tummy (abdominal) discomfort or cramps

These effects soon settle down as your body adjusts but if they continue or become troublesome, speak with your doctor or pharmacist for further advice

Sentirse mal (náuseas) o estar enfermo (vómitos)

Try taking lactulose with meals, or mixing your dose with some water or fruit juice

Si experimenta cualquier otro síntoma que crea que puede deberse al medicamento, hable con su médico o farmacéutico para obtener más consejos.

How to store lactulose

  • Mantenga todos los medicamentos fuera de la vista y del alcance 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

Si compras algún medicamento, consulta con un farmacéutico para asegurarte de que sea seguro tomarlo junto con tus otros medicamentos.

Nunca tome más de la dosis prescrita. Si sospecha que usted u otra persona podría haber tomado una sobredosis de este medicamento, acuda al departamento de accidentes y emergencias de su hospital local. Lleve el envase con usted, incluso si está vacío.

Si vas a someterte a una operación o tratamiento dental, informa a la persona que realiza el tratamiento sobre los medicamentos que estás tomando.

Este medicamento es para ti. Nunca lo des a otras personas, incluso si su condición parece ser la misma que la tuya.

Do not keep out-of-date or unwanted medicines. Take them to your local pharmacy who will dispose of them for you.

Si tienes alguna pregunta sobre este medicamento, consulta a tu farmacéutico.

Informar efectos secundarios de un medicamento o vacuna

Si experimenta efectos secundarios, puede reportarlos en línea a través de Sitio web de Yellow Card.

verificador de síntomas

¿No estás seguro sobre mezclar medicamentos?

Verifica posibles interacciones entre medicamentos, suplementos y alimentos antes de tomarlos juntos.

Preguntas frecuentes

Can diabetics take lactulose for constipation?

The article does not directly address whether lactulose is suitable for individuals with diabetes, but it mentions that certain medical conditions might require extra care. If you have diabetes, you should ensure your doctor or pharmacist is aware of your condition before taking lactulose.

Can lactulose be mixed with juice or other liquids?

Yes, if you experience feeling sick (nausea) or being sick (vomiting) when taking lactulose, the article suggests trying to mix your dose with some water or fruit juice.

Is it better to take lactulose with or without food?

The article suggests that if you experience nausea or vomiting, taking lactulose with meals might help. Otherwise, it doesn't specify whether it should be taken with or without food, focusing instead on taking it exactly as instructed by your doctor or as directed on the pack.

How long does lactulose stay in your system?

The article does not specify how long lactulose stays in your system. It primarily focuses on how long it takes for the effects to become noticeable, which can be up to 48 hours for a full benefit.

How often can you take lactulose solution?

For adults, the usual dose for constipation is 15 ml (three 5 ml spoonfuls) twice daily, but your doctor may recommend a different dose tailored to your needs. Always follow the specific instructions given by your doctor or on the pack.

Lecturas adicionales y referencias

Historial del artículo

La información en esta página está escrita y revisada por pares por clínicos calificados.
  • Next review due: 15 Oct 2026
  • 16 Oct 2023 | Última versión

    Última actualización por

    Michael Stewart, MRPharmS

    Revisado por

    Sid Dajani
verificador de elegibilidad para la gripe

Pregunta, comparte, conecta.

Navega por discusiones, haz preguntas y comparte experiencias en cientos de temas de salud.

Suscríbete al boletín de Patient

Tu dosis semanal de consejos de salud claros y confiables, escritos para ayudarte a sentirte informado, seguro y en control.

Por favor, introduce una dirección de correo electrónico válida

Al suscribirte aceptas nuestros Política de Privacidad. Puedes darte de baja en cualquier momento. Nunca vendemos tus datos.