How to Treat Dehydration Fast at Home: ORS Recipe, Severity Signs and When to Go to Hospital

For mild dehydration, the fastest safe treatment at home is oral rehydration solution (ORS), sipped steadily. Packets from a chemist are best. If none are available, mix 6 level teaspoons of sugar and half a teaspoon of salt in one litre of clean, boiled and cooled water. Give small sips every few minutes, continue after each loose stool or vomit, and rest in a cool place. If there is confusion, fainting, no urine for 8 hours, a very fast pulse, or you cannot keep fluids down, go to hospital.

Plain water helps, but it does not replace the salts lost in sweat, vomiting or diarrhoea, and ORS works better because glucose helps the gut absorb sodium and water together. This guide explains how to judge how dehydrated someone is, what to drink, what to avoid, how to care for children and older adults, and when home treatment isn't enough.

What dehydration is

Dehydration happens when the body loses more water and salts than it takes in. Common causes in India include:

• Diarrhoea and vomiting (gastroenteritis, food poisoning, cholera)
• Fever and heavy sweating, especially in summer heat
• Heat exhaustion and heatstroke
• Not drinking enough while working, travelling or fasting
• Diabetes with high blood sugar, which makes you pass a lot of urine
• Alcohol
• Certain medicines, such as diuretics
• Illness in older adults, who often feel less thirsty

How to tell how severe it is

Mild dehydration

• Thirst and dry mouth
• Darker yellow urine, passing less
• Mild headache or tiredness
• Slightly dry lips

Home treatment is usually enough.

Moderate dehydration

• Strong thirst, very dry mouth
• Dark urine, little urine
• Dizziness on standing
• Fast heartbeat
• Muscle cramps
• Headache, irritability or tiredness
• Sunken eyes

Start ORS at once and watch closely. Many people with moderate dehydration need medical review, especially children, older adults and anyone who is vomiting.

Severe dehydration

• Confusion, extreme drowsiness or difficulty waking
• Fainting
• Very fast, weak pulse and cold hands and feet
• Rapid breathing
• No urine for 8 hours or more
• Very dry, wrinkled skin that returns slowly when pinched
• Sunken eyes

This is an emergency. Go to hospital immediately. Intravenous fluids may be needed.

In babies and young children

Look for:

• No wet nappy for 6 hours (for infants), or no urine for 8 hours in a child
• Dry mouth, no tears when crying
• Sunken soft spot (fontanelle) on the head in a baby
• Sunken eyes
• Drowsiness, floppiness or irritability
• Fast breathing
• Cool, blotchy hands and feet

Infants and young children can become dehydrated quickly. Seek medical care early.

Step 1: Start oral rehydration

Ready-made ORS

Buy a WHO-standard ORS sachet and mix it exactly as printed, in the stated volume of clean water. The reduced-osmolarity formula recommended by WHO provides, per litre: sodium chloride 2.6 g, trisodium citrate 2.9 g, potassium chloride 1.5 g and glucose 13.5 g. Do not add extra sugar, salt or fruit juice, and do not dilute with more water than directed. Too much sugar can worsen diarrhoea; too little salt does not replace losses.

Use the solution within 24 hours of mixing and store it covered. Discard anything left after that.

Home-made ORS

If you cannot get a sachet quickly:

• 1 litre of clean water (boiled and cooled if you are unsure about the supply)
• 6 level teaspoons of sugar (about 25 g)
• Half a level teaspoon of salt (about 2 to 3 g)

Stir until dissolved. Measure carefully with level spoons. A salty or sweet taste far beyond what's described means the mix is wrong. It is better than plain water, but not as precisely balanced as a packet, so use a packet when you can.

Do not use a home recipe for a newborn without a doctor's advice.

How to drink it

• Sip small amounts often: a few spoonfuls every few minutes. Gulping can trigger vomiting.
• After vomiting, wait about 10 minutes, then restart with smaller, slower sips.
• Children: use a spoon or small cup every one to two minutes.
• Babies: keep breastfeeding, and give ORS between feeds if the doctor advises.
• Adults with diarrhoea can drink a glass of ORS after each loose motion. As a rough guide, a mildly dehydrated adult might need 2 to 3 litres of fluid over 24 hours, including normal drinks. Your doctor can adjust this to your situation.

Step 2: Other helpful fluids

Once you can drink and the worst is over, add:

• Coconut water (natural electrolytes, but not a complete ORS)
• Buttermilk (chaas) with a pinch of salt
• Rice water (kanji) or dal water
• Clear soups or broth
• Lemon water with a little salt and sugar (nimbu pani)
• Plain water in between
• Light foods as soon as appetite returns: banana, rice, khichdi, curd, toast, boiled potato

Don't withhold food for long. Eating normally during diarrhoea, as soon as you can, helps recovery.

What to avoid

• Undiluted fruit juice, cola and other sugary soft drinks. Their high sugar draws water into the gut and can worsen diarrhoea.
• Energy drinks.
• Tea, coffee and alcohol while dehydrated. They increase fluid loss or irritate the stomach.
• Very salty drinks. Extra salt doesn't speed things up and may cause harm.
• Anti-diarrhoea tablets such as loperamide in children, and in adults with fever or blood in stools, unless a doctor advises.
• Antibiotics without a prescription. Most diarrhoeal illness doesn't need them.
• Rest in a hot place. Move to a cool, shaded room.

Special groups: take extra care

• Babies and children under five. Dehydrate fast. Seek medical advice early. Doctors often advise zinc supplements for children with diarrhoea, in a dose appropriate to age.
• Older adults. Thirst weakens with age and dehydration can cause confusion and kidney injury.
• Pregnant women. Dehydration can bring on contractions, dizziness and urinary infections. Seek medical care if vomiting is persistent.
• People with diabetes. High sugar causes heavy urine loss. If glucose is high and you're dehydrated, seek medical advice. Don't use sugary ORS recipes without checking with your doctor if your sugar is very high.
• People with heart failure, kidney disease or liver disease. They may be on fluid or salt limits. Ask your doctor how much to drink.
• People on diuretics or blood pressure medicines. Your doctor may adjust the dose when you are ill.

Heat-related dehydration

During Delhi NCR summers, outdoor workers, travellers and older people are at risk of heat exhaustion and heatstroke.

• Heat exhaustion: heavy sweating, weakness, dizziness, nausea, headache, cool pale skin. Move to a cool place, remove tight clothing, sip ORS, apply cool wet cloths.
• Heatstroke: body temperature above about 40 °C, confusion, hot dry or sweaty skin, fainting, seizures. This is a life-threatening emergency. Call an ambulance, cool the person quickly with wet cloths and fanning, and do not give fluids if they are not fully conscious.

How to tell that it's working

• You feel less thirsty and more alert.
• Urine becomes pale yellow and you pass it regularly.
• Your heart rate and dizziness settle.
• Skin and mouth feel moist.

If you don't pass urine within 6 to 8 hours of starting ORS, or you are getting worse, go to a doctor.

Preventing dehydration

• Drink water regularly, not only when thirsty.
• Carry a bottle in hot weather and during travel.
• Increase fluids when you have fever, diarrhoea or vomiting, before you feel dehydrated.
• Add ORS to your travel kit and home medicine box.
• Drink boiled or filtered water, and keep food hygiene strict in the monsoon.
• Check urine colour: pale straw colour is good, dark amber means drink more.

Frequently asked questions

How to treat dehydration fast at home?

Sip ORS steadily, rest in a cool place, add other fluids as tolerated and eat light food. If symptoms are severe, go to hospital.

What is the best drink for dehydration?

ORS is best. Coconut water, buttermilk, rice water and dal water are good additions.

How long does it take to recover from dehydration?

Mild dehydration usually improves within a few hours of proper fluids. Moderate cases may take a day. Severe cases need hospital treatment.

Can I treat dehydration with just water?

Mild cases from not drinking enough can be fixed with water. After diarrhoea, vomiting or heavy sweating, ORS is better because it replaces salts too.

How do I make ORS at home?

One litre of clean water, 6 level teaspoons of sugar and half a teaspoon of salt. Stir well.

Is Gatorade or sports drinks as good as ORS?

Sports drinks have more sugar and less sodium than ORS and are not designed for diarrhoeal dehydration. They are fine for light exercise but not a replacement.

When should I go to hospital for dehydration?

If there is confusion, fainting, no urine for 8 hours, rapid heartbeat, inability to keep fluids down, blood in stool or vomit, or any severe signs. Take babies and young children early.

When to see a doctor

See a doctor if diarrhoea lasts more than two days, if you have a high fever, blood in the stool, severe belly pain, or if a baby, child, older person, pregnant woman or someone with a chronic illness is dehydrated. Seek emergency care for the severe signs listed above.

Care at Prakash Hospital Noida

Whether you live in Sector 18, Sector 62, Greater Noida West, or anywhere nearby, Prakash Hospital Noida is a trusted name for emergency and general medicine care in Noida. Our team can assess dehydration quickly and give intravenous fluids when needed.

To book a consultation, call the number.

Sources: World Health Organization reduced-osmolarity ORS formulation (as summarised on WikEM). Home-made ORS recipe as published in standard emergency medicine references.

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