Editing Water intoxication (section)

===Overexertion and heat stress===
Any activity or situation that promotes heavy sweating can lead to water intoxication when water is consumed to replace lost fluids. Persons working in [[heat wave|extreme heat]] and/or humidity for long periods must take care to drink and eat in ways that help to maintain electrolyte balance. People using drugs such as [[MDMA]] (often referred to colloquially as "Ecstasy") may overexert themselves, perspire heavily, feel increased thirst, and then drink large amounts of water to rehydrate, leading to electrolyte imbalance and water intoxication – this is compounded by MDMA use increasing the levels of [[Vasopressin|antidiuretic hormone]] (ADH), decreasing the amount of water lost through urination.<ref>{{cite book |first=John |last=Timbrell |title=The Poison Paradox: Chemicals as Friends and Foes |url=https://books.google.com/books?id=qYYOtQU37jcC |year=2005 |publisher=OUP Oxford |isbn=978-0-19-280495-2}}</ref> Even people who are resting quietly in extreme heat or humidity may run the risk of water intoxication if they drink large amounts of water over short periods for rehydration.{{cn|date=November 2024}}