Loose Motions (Dast) in Adults: ORS Amounts, Food and Red Flags

Two hundred millilitres. That’s the number to hold onto when loose motions (dast) hit an adult: at least one full glass of ORS after every loose stool, every time, until the stools firm up. Almost everything else in this Desi Remedies guide is detail around that one habit: how much by body weight, what to eat, what quietly makes it worse, why zinc and antibiotics are a doctor’s decision, and the signs that mean you’ve stopped being a home-care case.

Why the ORS matters more than the cause

Most adult diarrhoea in Pakistan is a viral or bacterial infection picked up from water, cut fruit, a dawat that sat out too long, or a hand that didn’t get washed. The gut lining gets inflamed and stops absorbing water, so the water you drink, plus the fluid your own gut secretes, runs straight through. An adult can lose 1 to 2 litres in a bad day without noticing, because thirst lags behind. The salt goes with it. A body short of water and sodium gets dizzy, weak, cramps up, and in older or unwell people can tip into kidney injury or a collapse. The infection usually clears itself in a few days; the dehydration is what you have to actively manage.

That’s the whole case for ORS. Plain water replaces water but not salt, and without the sugar-and-salt pairing the gut absorbs it poorly during diarrhoea, whereas ORS is built so that glucose pulls sodium across the gut wall and water follows behind it even when the lining is inflamed and everything else is running straight through. Juice can’t do that. Cola can’t. Sharbat can’t.

How much ORS, and how to make it right

A pharmacy sachet is the reliable option: one sachet into exactly 1 litre of boiled-and-cooled or bottled water, never less water to make it “stronger”, and used within 24 hours. If you have no sachet, the namak-cheeni ghol recipe gives the exact half-teaspoon of salt and six teaspoons of sugar per litre, and the reasons the measurements matter. Too much salt in a homemade mix is genuinely dangerous, so measure with spoons, not by taste.

1. After each loose stool, drink 200 to 400 ml of ORS: one to two glasses. Sip over 10 to 15 minutes rather than gulping, which brings on vomiting.
2. If you’re clearly behind (dry mouth, strong thirst, dark urine, skin that tents when pinched), aim for roughly 50 to 75 ml per kg of body weight over the first 4 hours, then go back to the per-stool amount. For a 60 kg adult that’s 3 to 4.5 litres across 4 hours, taken in small, frequent sips. If you can’t manage that because of vomiting, or you’re dizzy on standing, that alone is a reason to be seen.
3. Between stools, keep drinking: water, weak tea, thin daal water, rice kanji, unsweetened lassi or chaas. Aim for 2.5 to 3 litres of total fluid across the day while the stools are loose.
4. Check your urine every few hours. Pale yellow means you’re keeping up. Dark amber, or none for 8 hours, means you’re behind.
5. Keep going until stools have been formed for 6 hours. Stopping the ORS when you “feel better” is how the second dizzy spell happens.

If you’re vomiting as well, wait 10 minutes after each vomit, then restart with a tablespoon of ORS every 2 to 3 minutes. Small and constant beats one glass thrown up.

What to eat, and when

The old advice to fast until it stops has been dropped. Eat. The gut lining recovers faster with something in it, eating helps the ORS work, and an adult who has eaten a small bowl of khichdi within 4 to 6 hours of the first bout is usually further ahead the next morning than one who sat in bed on black tea, so start as soon as you can face food and keep it plain, warm and small.

Good choices are the ones grandmothers already reached for: moong dal khichdi made thin with a little salt, plain rice with dahi, boiled potato with a pinch of salt, a ripe banana (kela), soft roti with a boiled sabzi, sooji or dalia porridge made with water, and a cup of thin yakhni. Dahi is worth a special mention. Fresh dahi is usually well tolerated even when milk isn’t, and it replaces some of the gut’s own bacteria. One katori, plain, with khichdi is a sensible first meal.

Eat 5 or 6 small portions rather than 2 big ones. A fistful of rice, half a katori of daal, one banana. Then again 3 hours later. Small. Warm. Often.

What quietly makes it worse

Fruit juice, packet juice, cola and Rooh Afza are the big ones. Their sugar load draws water into the gut and the diarrhoea gets worse. Milk and cream can bloat and cramp for a week or so after a gut infection because the enzyme that digests lactose lives in the very lining that’s been damaged, which is why a katori of dahi goes down fine on day two while a glass of doodh sends the same person straight back to the bathroom. Fried food, samosas, heavy salan, very spicy food, raw salad, and cut fruit from outside all wait until you’ve had a full day of formed stools. Chai and coffee are mildly laxative and dehydrating in quantity; one cup is fine, five isn’t.

The other thing that makes it worse is the pharmacy counter. Self-bought metronidazole (Flagyl) and ciprofloxacin are handed over for every loose stool in Pakistan, and most of those episodes are viral, where antibiotics do nothing except add nausea and kill the good bacteria you need. Antibiotics have a real place in specific bacterial infections, typhoid and some cases with fever and blood, and that’s exactly why a doctor should decide, ideally after a stool test.

Zinc, anti-motility tablets and the doctor’s call

Zinc is proven for children with diarrhoea and is part of every paediatric plan; for adults the picture is much less clear, and it’s not something to self-start from a shop. Ask if you’re seen.

Loperamide (Imodium) slows the gut down. For a healthy adult with watery stools, no fever and no blood, a pharmacist may suggest it for a long bus ride or a day you cannot be near a toilet. It should never be used if there’s fever, blood or mucus in the stool, or severe abdominal pain, because slowing the gut then traps the infection and can lead to a dangerously swollen bowel. It’s not for children. And it doesn’t replace fluids; a stool you don’t pass is still fluid you owe.

Probiotics from a pharmacy may shorten an episode by a day for some people and are safe for healthy adults. Fresh dahi does much the same job for less.

Red flags, and when to test

Home care ends at any one of these. One. Don’t wait for two.

1. Blood in the stool, or stools that are black and tarry, at any point.
2. Fever over 38.5°C, or any fever with shaking chills.
3. No urine for 8 hours, or dizziness or fainting on standing, or confusion. That’s dehydration you cannot correct at home fast enough.
4. Vomiting everything, including ORS, for more than 4 to 6 hours.
5. Severe or constant abdominal pain, especially in one spot, or a hard, swollen belly. Our stomach ache triage guide explains why location matters.
6. More than 6 watery stools a day beyond 2 days, or diarrhoea still going on day 3 with no improvement.
7. Diarrhoea that started within a month of a course of antibiotics, or after hospital care. This needs a specific test.
8. Any of it in someone over 65, pregnant, on diabetes, heart, kidney or blood-pressure medicine, or with a weak immune system. These people are seen earlier, not later.

Testing is usually a stool “routine and culture” and, if there’s fever, a blood count and typhoid test, all of which cost less than the antibiotics people buy blind and all of which turn guessing into treatment. Diarrhoea beyond 14 days is a different problem (chronic diarrhoea) with a different list of causes, from giardia to gluten to thyroid, and needs a proper work-up rather than another course of Flagyl.

Questions people ask