ApoHealth Effervescent Electrolyte Tablets help replace water and electrolytes lost due to vomiting, diarrhoea, heavy sweating, vigorous exercise and excess alcohol consumption. ApoHealth Effervescent Electrolyte Tablets may be taken on the first signs of fluid loss due to vomiting and diarrhoea. ApoHealth Effervescent Electrolyte Tablets may also be taken to help manage dehydration caused by heavy sweating, vigorous exercise, excess alcohol consumption or due to a hot or dry environment. Signs of mild dehydration included: Sticky or dry mouth, increased thirst, lethargy, decreased urine output, dark yellow urine.