Hydralyte Effervescent Electrolyte Tablets Watermelon Burst Flavoured relieves symptoms of dehydration and helps replace water and electrolytes lost due to vomiting, diarrhoea, heavy sweating, vigorous exercise and occasional hangovers. - Hydralyte Effervescent Electrolyte Tablets Watermelon Burst 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 dehydration - Sticky or dry mouth, increased thirst, lethargy, decreased urine output, dark yellow urine. - No added Gluten - No artificial flavours - No artificial colours - Kosher Certified - Preservative Free