How effective is IV fluid therapy for heat exhaustion?

Heat exhaustion follows heat exposure with fluid and salt loss. An infusion can support circulation when oral drinks are not tolerated, while moving to a cool place, loosening clothing and resting help reduce heat load. It is not a replacement for cooling. A clinician decides whether IV treatment is appropriate after checking mental state, temperature, circulation and other possible causes of weakness.

Stop exertion and move into shade or air conditioning. Lie down, remove excess clothing and use cool wet cloths or a fan. If fully alert and not vomiting, sip water or an oral rehydration drink. Avoid returning to heat until recovered. Medical assessment is needed if symptoms do not improve promptly or drinking is difficult.

Call emergency services for confusion, collapse, seizure, loss of consciousness, very hot skin, severe breathing trouble or inability to drink. These features can indicate heat stroke rather than uncomplicated heat exhaustion and require urgent cooling and hospital treatment. Do not delay for an IV clinic.

Ask whether your temperature, hydration and mental alertness fit heat exhaustion, how to replace fluids safely, and when you may resume work or exercise in heat. Mention medicines and conditions that affect fluid balance.