Does oral rehydration therapy help with dizziness?

Fluid loss from diarrhoea, vomiting, heavy sweating or not drinking enough can reduce circulating fluid and disturb electrolytes. This may cause light-headedness, thirst, dry mouth, weakness or darker urine. A balanced oral rehydration solution can replace water and salts in these situations. Dizziness can also come from low blood pressure, low blood sugar, anaemia, inner-ear problems, medication effects or heart and neurological conditions, so rehydration will not address every cause.

Sit or lie down when dizzy to reduce the chance of falling, then rise slowly. If fluid loss is likely and you can swallow safely, take small sips of correctly prepared oral rehydration solution. Avoid driving, heights and machinery until your balance and alertness return. Keep track of triggers, fluid losses, urination and other symptoms, and arrange a review if episodes recur or do not improve.

Get emergency help for dizziness with fainting, chest pain, severe headache, trouble speaking, one-sided weakness, new confusion, severe breathlessness or an irregular heartbeat. Seek urgent care if you cannot keep fluids down, pass very little urine or remain dizzy despite resting and drinking. Older adults and people with kidney or heart conditions should seek advice early.

Could dehydration explain my dizziness, or should we check blood pressure, glucose, blood count or medicines? Which fluids are appropriate for my health conditions? What warning signs should prompt emergency care?