<P> ORT should be discontinued and fluids replaced intravenously when vomiting is protracted despite proper administration of ORT, signs of dehydration worsen despite giving ORT, the person is unable to drink due to a decreased level of consciousness, or there is evidence of intestinal blockage or ileus . ORT might also be contraindicated in people who are in hemodynamic shock due to impaired airway protective reflexes . Short - term vomiting is not a contraindication to receiving oral rehydration therapy . In persons who are vomiting, drinking oral rehydration solution at a slow and continuous pace will help the vomiting to resolve . </P> <P> WHO and UNICEF jointly have developed official guidelines for the manufacture of oral rehydration solution and the oral rehydration salts used to make it (both often abbreviated as ORS). They also describe acceptable alternative preparations, depending on material availability . Commercial preparations are available as either pre-prepared fluids or packets of oral rehydration salts ready for mixing with water . </P> <P> The formula for the current WHO oral rehydration solution (also known as low - osmolar ORS or reduced - osmolarity ORS) is 2.6 grams (0.092 oz) salt (NaCl), 2.9 grams (0.10 oz) trisodium citrate dihydrate (C Na O ⋅ 2H O), 1.5 grams (0.053 oz) potassium chloride (KCl), 13.5 grams (0.48 oz) anhydrous glucose (C O) per litre of fluid . </P> <P> A basic oral rehydration therapy solution can also be prepared when packets of oral rehydration salts are not available . It can be made using 6 level teaspoons (25.2 grams) of sugar and 0.5 teaspoon (2.9 grams) of salt in 1 litre of water . The molar ratio of sugar to salt should be 1: 1 and the solution should not be hyperosmolar . The Rehydration Project states, "Making the mixture a little diluted (with more than 1 litre of clean water) is not harmful ." </P>

World health organization recipe for oral rehydration solution
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