What is Dehydration?

Dehydration in Adults

Causes of Dehydration in Adults

Dehydration is a common condition amongst adults. Adults are exposed to a variety of environments, recreations and activities which place them at a high risk of dehydration.

Because an excessive loss of body fluids causes dehydration, it is important to recognize what are some of the ways your body can lose those fluids.

Preventing or relieving dehydration in adults has a lot to do with replenishing the essential fluids and electrolytes your body may have loss.

Adult dehydration stomach flu

Gastroenteritis or Stomach Flu

Stomach flu is an extremely common condition amongst adults. Parents in particular are exposed to many bugs and viruses through children who are unwell, and cases of stomach flu can spread throughout the household very quickly. The fluid loss associated with the stomach flu (vomiting) can often lead to dehydration in adults and children.

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Adult dehydration sweating

Heavy sweating

When you sweat, you lose both fluids and electrolytes, the loss of fluid and electrolytes can cause mild to moderate dehydration in adults. Prolonged heat exposure, endurance exercise and prolonged physical work can increase your sweat rate. Fluid and electrolytes are commonly lost through sweat making it important to replace them to avoid dehydration.

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Adult dehydration fever


A fever is defined as an elevated body temperature (above 98°F). This is often accompanied by increased sweating and a loss of body fluids and electrolytes that ultimately can cause mild dehydration. People with a fever can find they eat or drink less than normal, which may also contribute to dehydration.

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Adult dehydration travel


There are many risks of dehydration associated with traveling. Many of the dehydration risks travelers face, are due to conditions such as ‘travelers’ diarrhea and prolonged heat exposure due to the sun. Whether you are traveling for business, leisure or for a family vacation, be aware of the risk of dehydration.

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Adult dehydration pregnancy


Women who are pregnant may be at a higher risk of adult dehydration due to morning sickness, or a lack of food or fluid intake due to feeling nauseous.

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Adult dehydration colonscopy

Clinical conditions

Dehydration occurs commonly in association with everyday medical procedures (such as colonoscopies), fasting prior to medical or surgical procedures, and other medical conditions.

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Rehydration Solution for Adults

To prevent and relieve adult dehydration, adults should consume an oral rehydration solution (Hydralyte) when they are at risk of dehydration.

Hydralyte is scientifically formulated to contain the correct balance of glucose and electrolytes for rapid rehydration. The formulation is based on the World Health Organization criteria for effective rehydration. Water or sugary drinks are not as effective as Hydralyte, as they do not restore lost electrolytes (which retain the fluid).

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