What it is used for
- Replacing fluids and salts lost through diarrhea or vomiting
- Preventing and treating mild to moderate dehydration
- Recovery from gastroenteritis (stomach bug)
How it works
ORS provides a balanced mix of glucose and salts that the gut absorbs efficiently together, pulling water back into the body. This replaces what is lost in diarrhea and vomiting and helps prevent dehydration.
How it is taken
Comes as sachets of powder or effervescent tablets that are dissolved in a measured amount of clean or boiled-and-cooled water, and sometimes as ready-made liquids. It is sipped by mouth, often little and often. Mix and use exactly as the label directs, using the correct amount of water; do not make it more concentrated.
No doses here on purpose. The right strength and schedule depend on you — only a doctor or pharmacist should set them. Always follow your prescription and the label.
Common side effects
- Mild nausea if taken too quickly
- Vomiting if drunk too fast (sip slowly)
Serious effects — get help
- Signs of severe dehydration despite ORS (very little urine, sunken eyes, drowsiness, confusion) — seek urgent care
- Persistent vomiting that prevents keeping fluids down
- Swelling or breathing problems (rare, possible salt imbalance if mixed wrongly)
If a reaction is severe — for example trouble breathing, swelling of the face or throat, or collapse — go to the nearest emergency room now or call your local emergency number. Do not wait for an online consultation.
Interactions to watch
- Generally few; tell your clinician if you are on a restricted-salt or restricted-potassium diet or have kidney problems
Who should take care
- Always mix with the stated amount of clean water; too strong a mix can be harmful, especially for children
- People with kidney disease or on fluid/salt restrictions should ask a clinician first
- Seek medical care for babies, older adults, or anyone with signs of significant dehydration
- Do not delay medical help for ongoing or bloody diarrhea while relying on ORS alone