Diarrhoea is defined as an increase in stool frequency accompanied by a decrease in consistency. In prostate cancer, it may result from the toxicity of chemotherapy or radiotherapy treatment. It can also occur when other drugs or antibiotics are administered and depending on the case, it may be mild or severe. If prolonged, consult your medical team.


Toasted bread, breadsticks and dextrinated cereals (powdered breakfast cereals for adults), meat, fish, eggs (French omelette, grilled chicken, fish en papillote), pasta, rice and rice soups, potato, wheat and tapioca, plain biscuits, crackers, etc.

Start with a liquid diet, e.g., rice water, and gradually incorporate easily digestible foods such as mashed potatoes and carrots, boiled rice, white fish, boiled chicken and baked or grated apples.

Have small servings of food frequently throughout the day.

Sweets, fruit syrups, sugar, honey, chocolate, sweetened drinks, xylitol, sorbitol, etc., are not recommended.

Avoid coffee, chocolate, black tea, alcohol, and spicy condiments, such as pepper.

Depending on tolerance, they can be gradually incorporated.

It is not recommended to consume butter, margarine, lard, mayonnaise, cream, heavy cream, and baked goods, amongst others.

  • Wholegrain cereals and derivatives, raw fruits, vegetables, pulses, and nuts are not recommended.
  • Choose fruit without skin, cooked, baked, baked, microwaved or stewed, in juice, syrup or strained juices. Fruit in syrup (apple, pear, and peach), quince or banana and well-ripened pear.
  • Vegetables low in fibre (courgette, pumpkin, carrot) can be consumed in small quantities (test tolerance) always without skin and seeds and very well cooked, also in the form of strained creams or broths.
  • Test your tolerance to fruit and vegetable smoothies as all fibre is removed in the blending process.

Boiling, grilling, steaming, and baking in the oven are easier-to-digest cooking methods.