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Diarrhoea - Rightangled

What is Diarrhoea?

Diarrhea is a common digestive ailment characterized by frequent, loose, and watery bowel movements. It is often a symptom of an underlying condition, infection, or dietary factors that disrupt the normal functioning of the gastrointestinal system. Diarrhea can range in severity from mild and temporary to more severe and chronic cases. Understanding the causes, diagnosis, available treatments, and prevention strategies is essential for effectively managing diarrhea and maintaining optimal digestive health.


Diarrhea can be caused by a variety of factors, including:

- Infections: Bacterial, viral, and parasitic infections can irritate the digestive tract and lead to diarrhea. Common infections include gastroenteritis (stomach flu) and food poisoning.

- Dietary Factors: Consuming contaminated food or water, excessive intake of certain foods (e.g., high-fat or spicy foods), and food sensitivities or allergies can trigger diarrhea.

- Medications: Certain medications, especially antibiotics, can disrupt the balance of gut bacteria and lead to diarrhea.

- Digestive Disorders: Conditions like irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and celiac disease can cause chronic diarrhea.

- Traveler's Diarrhea: Changes in diet and exposure to unfamiliar pathogens while traveling can lead to traveler's diarrhea.

- Stress and Anxiety: Emotional stress or anxiety can influence digestive function and contribute to diarrhea in some individuals.


Diagnosing the underlying cause of diarrhea involves a thorough assessment by a healthcare provider. The diagnostic process typically includes:

- Medical History: The healthcare provider will inquire about the duration, frequency, and characteristics of the diarrhea, as well as any additional symptoms.

- Physical Examination: A physical exam may be conducted to assess hydration levels, abdominal tenderness, and other signs of illness.
Stool Sample Analysis: If an infection is suspected, a stool sample may be collected and analyzed for the presence of pathogens.

- Blood Tests: Blood tests can help identify signs of infection, inflammation, or other underlying conditions.

- Colonoscopy or Endoscopy: In some cases, a colonoscopy or endoscopy may be performed to visualize the digestive tract and identify abnormalities.


Treatment for diarrhea depends on the underlying cause and severity of the condition. It's important to stay hydrated and replace lost fluids and electrolytes during episodes of diarrhea. Treatment options may include:
Fluid Replacement: Drinking clear fluids, oral rehydration solutions, or electrolyte-rich drinks can help prevent dehydration.
Dietary Adjustments: Consuming bland foods like rice, bananas, applesauce, and toast (BRAT diet) can be helpful in easing symptoms.
Medications: Over-the-counter antidiarrheal medications containing loperamide or bismuth subsalicylate can provide relief from diarrhea symptoms. However, these medications should be used cautiously and under the guidance of a healthcare provider.
Treating Underlying Conditions: If diarrhea is a symptom of an underlying condition, addressing the root cause through appropriate treatment is essential.


Preventing diarrhea involves adopting healthy habits and precautions to minimize the risk of infection and digestive disturbances:

- Hygiene: Wash hands thoroughly with soap and water, especially before eating and after using the restroom, to prevent the spread of infections.
Food Safety: Consume clean, properly cooked foods, and avoid eating raw or undercooked meats, seafood, and eggs.

- Water Quality: Drink safe, bottled or purified water when traveling to areas with questionable water quality.

- Stress Management: Practice stress-reduction techniques to support digestive health.
Vaccinations: Some travel destinations may require specific vaccinations to reduce the risk of infections that cause diarrhea.

In conclusion, diarrhea is a common digestive symptom that can be caused by various factors, including infections, dietary triggers, and underlying conditions. Proper hydration, dietary adjustments, and appropriate treatment measures can help alleviate symptoms and promote recovery. Maintaining good hygiene, food safety practices, and stress management techniques can contribute to reducing the risk of diarrhea and maintaining optimal digestive well-being. If diarrhea is persistent, severe, or accompanied by additional concerning symptoms, consulting a healthcare provider is recommended for proper evaluation and guidance.

Further info

Read more about Diarrhoea on NHS website, following the link below:

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Can certain medications cause diarrhea?

Yes, certain medications can disrupt the normal balance of gut bacteria and lead to diarrhea. Antibiotics, for example, are known to affect the digestive system and may result in diarrhea as a side effect. If you suspect that a medication is causing diarrhea, consult your healthcare provider before making any changes to your treatment regimen.

Is it normal to have occasional bouts of diarrhea?

Occasional episodes of diarrhea can be normal and may be triggered by factors such as dietary changes, stress, or minor infections. However, persistent or recurrent diarrhea should be evaluated by a healthcare provider, as it could be a sign of an underlying condition that requires attention.

Can diarrhea lead to dehydration?

Yes, diarrhea can lead to dehydration, especially if fluid and electrolyte losses are not adequately replenished. It's important to drink plenty of fluids and, if necessary, oral rehydration solutions to prevent dehydration during episodes of diarrhea. Signs of dehydration include increased thirst, dark urine, dry mouth, and fatigue.

Can I prevent traveler's diarrhea when visiting foreign countries?

While traveler's diarrhea is a common concern when visiting foreign countries, there are steps you can take to reduce the risk:

- Water Safety: Drink bottled or purified water, and avoid consuming tap water, ice, or beverages with ice made from tap water.

- Food Precautions: Choose hot, freshly cooked foods and avoid raw or undercooked meats, seafood, and fruits that cannot be peeled.

- Hygiene Practices: Wash your hands frequently with soap and water, especially before eating, and use hand sanitizers when necessary.

- Vaccinations: Depending on your travel destination, certain vaccinations may be recommended to provide protection against specific infections that can cause diarrhea.

- Antibiotics: In some cases, a healthcare provider may prescribe antibiotics as a preventive measure for traveler's diarrhea, especially if you are at higher risk.

Medically reviewed & approved

This page was medically reviewed by Dr Sohaib Imtiaz (clinical lead) |

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