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Diarrhoea

Diarrhoea is a common condition which can occur for a number of reasons, including infections and intolerances.

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Available Treatments

Dioralyte

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  • Replenishes lost electrolytes
  • Actively rehydrates
  • Drinkable solution
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Norimode

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  • Reduces bowel spasm
  • Relieves diarrhoea
  • Available for next-day delivery
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Imodium Syrup SF

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  • Regulates bowel movements
  • Thickens stools
  • Easy to take oral suspension
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Loperamide

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  • Treats acute and chronic diarrhoea
  • Slows down bowel movements
  • Encourages electrolyte absorption
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What is diarrhoea?

Diarrhoea is a common condition which causes you to defecate more frequently. Your stools may be loose and watery. The condition is often accompanied by stomach discomfort and sometimes vomiting.

After food is partially digested by the stomach, it passes through the intestines. Waves of contractions within the gut push the matter along through the intestinal tract slowly, allowing for bacteria in the intestines to extract any remaining water and nutrients via the process of fermentation.

Once the matter reaches the sigmoid colon - a part of the large intestine just before the rectum - the faeces should be dry and compact, ready to be expelled from the body through defecation.

If the faeces are pushed through the large intestine quickly, which can occur after eating a large meal, or if an infection interferes with the natural gut flora (bacterial ecosystem of the gut), the bacteria cannot work as effectively to remove the water and nutrients. As a result, the faeces reach the sigmoid colon and rectum with an excessive amount of water, thus causing diarrhoea.

What is Travellers' Diarrhoea?

The term travellers' diarrhoea is often used to describe a bout of diarrhoea which occurs after travelling to a place with poor public hygiene. Most cases of travellers' diarrhoea are caused by bacterial infections such as Salmonella, Shigella and E Coli, contracted from contaminated water, uncooked foods and dairy products, food poisoning or parasites.

If you are planning on travelling abroad, you can use the NHS' Fit For Travel website for information about the risks associated with certain countries and climates.

While diarrhoea is an unpleasant condition, it typically clears up within a week. If your diarrhoea lasts longer than 7 days, you should speak to your GP to determine the cause of the diarrhoea.


What can cause diarrhoea?

Diarrhoea can be caused by a number of conditions. Short-term diarrhoea can be caused by:

  • Alcohol
  • Anxiety
  • Appendicitis
  • Bacteria (E coli, shigella, salmonella)
  • Food intolerances
  • Food poisoning
  • Intestinal damage
  • Medicines (antibiotics, SSRIs, NSAIDs, statins and laxatives)
  • Parasites
  • Viruses (norovirus and rotavirus)

If you suffer from diarrhoea long-term diarrhoea, you should speak to your doctor about appropriate treatments for you.

While diarrhoea itself is simple to diagnose, it may be difficult to diagnose the underlying medical condition which might be causing it. In the cases of intolerances and alcohol consumption, your diet may need to be adjusted.


How can I prevent diarrhoea?

Diarrhoea is often the result of an infection from a virus or bacteria, so preventing diarrhoea relies on preventing these types of infections by maintaining high personal hygiene standards.

  • Avoid cross contamination between cooked and uncooked meat
  • Avoid sharing towels and utensils with other people
  • Regularly clean bathroom facilities, including the toilet seat and handle
  • Wash your hands after each use of the toilet

If your diarrhoea is caused by a food intolerance, swapping out the food you are allergic to with something you are not can prevent diarrhoea. If you suspect you have a food intolerance, such as coeliac disease or lactose intolerance, speak to your GP. Food additives and other chemicals, such as caffeine, histamine, mono sodium glutamate (MSG), have also been reported to cause diarrhoea in some people.

It can sometimes be challenging preventing diarrhoea, especially when travelling abroad, but appropriate steps can and should be taken to avoid diarrhoea.


Can diarrhoea be treated?

While diarrhoea as a symptom can often be easily treated, the underlying condition which causes it may need a separate course of treatment. For example, a bacterial infection may require a short course of antibiotics to rid the infection, or an intolerance may require a change in diet to prevent diarrhoea from reoccurring.

You should speak to your doctor to determine the cause of your diarrhoea so that they can advise the best treatment for you.

There are a number of treatments for bouts of diarrhoea, which all work in different ways.

Loperamide, Norimode and Imodium reduce the number of contractions in the intestines, slowing down the movement of faeces within the bowel and restoring the natural rhythm of your bowels.

Dioralyte is an electrolyte drink which can increase the viscosity of your stools and prevent dehydration, which can often occur during an acute case of diarrhoea. The powder is mixed with water to create a solution which you drink.

While suffering from diarrhoea, you should stay hydrated by drinking plenty of water or squash. If you feel sick, take small sips of water or squash throughout the day to remain adequately hydrated.

Alcohol should also be avoided while treating diarrhoea. Not only can alcohol increase your chances of experiencing side effects of an antidiarrhoeal, such as nausea and dizziness, but it can also increase the speed at which faecal matter travels through your bowels. This increase in speed prevents water from being absorbed effectively and results in loose and water stools.

If you can eat, try eating small portions of food. Avoid spicy foods or foods which are high in fat as they may make your diarrhoea worse. The NHS recommends eating potatoes, rice, bananas, boiled vegetables and salty foods if you are suffering from diarrhoea.

While treating diarrhoea, be vigilant to the signs and symptoms of dehydration, which may include:

  • Dark urine
  • Dizziness
  • Dry mouth
  • Dry skin

In severe cases, muscle cramps, sunken eyes, dizziness, confusion and fainting can occur. If you suspect severe dehydration, seek immediate emergency medical attention.

When should you see your doctor?

Diarrhoea can be the symptom of a number of serious health conditions. If your diarrhoea is accompanied by any of the following systems, speak to your GP:

  • Blood in stools
  • Dark or black stools
  • Severe stomach ache
  • Symptoms of dehydration (mentioned above)
  • Vomiting
  • Weight loss

If your diarrhoea lasts more than a week or if it recurs frequently, speak to your GP.


Table of contents

What is diarrhoea?

What causes diarrhoea?

How can I prevent diarrhoea?

Can diarrhoea be treated?