Hydralyte Effervescent Electrolyte Tablets Apple Blackcurrant 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.