Hydralyte Sachets Orange 24 PackHydralyte Electrolyte Powder Orange Flavoured relieves symptoms of dehydration and helps replace water and electrolytes lost due to vomiting, diarrhoea, heavy sweating, vigorous exercise and occasional hangovers. Dehydration due to: Vomiting & diarrhoea. Heat. Travel. Vigorous exercise. Heavy sweating. Occasional hangovers. Heat & excessive exercise at work. Signs of mild dehydrationSticky or dry mouth, increased thirst, lethargy, decreased urine