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CION Cancer Clinics
What can go through a feeding tube, and what cannot | CION Cancer Clinics
Through a PEG or feeding tube, give only three things: the feed your dietitian planned, clean boiled or bottled water, and medicines your doctor or pharmacist has cleared for the tube. Home food, juice and herbal mixtures should wait until you have asked. This page explains why, what is usually allowed, and what the family at home needs to check before anything new goes in. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
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Medically reviewed by Dr. Muralidhar MuddusettyConsultant Surgical Oncologist · MBBS (AIIMS), MS (Surgery, AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh) · last reviewed September 2026, next review due September 2027
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On this page
- What can safely go through a feeding tube?
- Which kinds of feed are used at home?
- What is usually fine, and what needs a question first?
- What should you do each time something goes in?
- What do families often get wrong about tube feeds?
- What do the words on the feed chart mean?
- What about medicines, and what can this page not tell you?
- Common questions about what goes through a feeding tube
The short answer
What can safely go through a feeding tube?
Only three things should go through the tube: the feed your dietitian has planned, clean water, and medicines your doctor or pharmacist has cleared for the tube. Anything else, including home food, juice or herbal mixtures, should wait until you have asked your team.
Why the list is so short
The tube is narrow. It has no teeth, no taste and no way of pushing a lump along. Anything thick or stringy can block it, and a blocked tube can mean a trip back to hospital. The stomach at the far end also has to cope with what arrives. Food that would be fine by mouth can cause loose motions, bloating or vomiting when it goes straight in without being chewed.
What your dietitian is working out
Your feed plan is built around your weight, your treatment, your blood results and how much you can still eat by mouth. It tells you how much feed to give, how often, and how much extra water you need. If you change what goes in, the plan no longer adds up, even if the new food looks healthier.
This page describes what is usually allowed. Your own tube, your own surgery and your own treatment may change that. Your team's written plan comes first.The main options
Which kinds of feed are used at home?
Most families in Hyderabad start with one of these, and some move between them as treatment goes on.
Ready-made tube feed
A liquid or powder made for tube feeding, with a known amount of energy, protein, vitamins and salts. It flows easily and is the usual starting point after the tube goes in.
Often chosen when
- The tube is new or narrow
- Feeds run through a pump
- Blood counts are low during chemotherapy
Special-purpose feeds
Versions made for diabetes, kidney problems, extra protein or a gut that is struggling. Your dietitian picks one only if your reports point to it. Do not switch on your own because a label sounds suitable.
Blended home food
Cooked food blended very smooth and thinned until it passes through a syringe. Some families prefer it. It needs a wide tube, a dietitian's recipe and careful kitchen hygiene.
Not suitable for every tube or every stage of treatment.Water
Clean boiled and cooled water, or water from a sealed bottle. It flushes the tube and keeps you from getting dry. Many people on tube feeds need more water than they realise, especially in summer.
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What is usually fine, and what needs a question first?
Usually fine
Ask your team first
The prescribed feed, made up exactly as the label says
Adding milk powder, protein powder or eggs to it
Boiled and cooled water or sealed bottled water
Tender coconut water, juice, soup or buttermilk
Medicines in liquid form, cleared for the tube
Crushed tablets or opened capsules
A dietitian-planned home blend in a wide tube
Ayurvedic, herbal or home remedy mixtures of any kind
Every time
What should you do each time something goes in?
Sit upright and wash your hands
The person should be sitting up or propped well up in bed. Wash your hands with soap and dry them on a clean cloth before you touch the tube, the feed or the syringe.
Flush with water first
Push a syringe of clean water through slowly. If it will not go, stop. Do not force it, and do not give the feed until the tube is clear.
Give one thing at a time
Give the feed slowly. Give each medicine on its own, with a little water between them. Never mix medicines into the feed bag or into each other.
Flush again and stay upright
Finish with another syringe of water. Keep the person sitting up for a while afterwards so the feed does not come back up into the throat.
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Commonly believed
What do families often get wrong about tube feeds?
"Home food is always better than something out of a tin."
Home food can be good, but it is easy to get too little protein or energy when it is thinned enough to pass. A ready-made feed is not a lesser choice. It is often what keeps weight steady through radiotherapy or chemotherapy, when weight loss does the most harm.
"If he cannot taste it, it does not matter what goes in."
The stomach and gut still react to what arrives. Rich, oily or very sweet mixtures often cause loose motions, cramps or vomiting when they go straight in. What goes in matters more with a tube, not less.
"A little kashayam through the tube will build strength."
Herbal mixtures can block the tube, upset the stomach and interfere with chemotherapy or other medicines. Nobody can tell you whether a particular mixture is safe without knowing what is in it. Ask before giving anything of this kind.
"More feed will make her recover faster."
Giving more than planned can cause bloating, vomiting and feed coming back up into the chest. If you feel the amount is too little, tell the dietitian. The plan can be changed safely.
On the feed plan
What do the words on the feed chart mean?
- Bolus feed
- Feed given by syringe in several portions through the day, a bit like meals.
- Continuous or pump feed
- Feed dripped in slowly by a small machine over many hours, often at night.
- Flush
- Water pushed through the tube to clean it before and after feeds and medicines.
- Blenderised diet
- Home food blended smooth enough to go through the tube, made to a dietitian's recipe.
- Enteral nutrition
- Any feeding that goes into the stomach or gut, whether by tube or by mouth.
Being straight with you
What about medicines, and what can this page not tell you?
Many medicines can go through a tube, but not all of them, and not always in the form you were given. Take every tablet strip to the pharmacist or the ward and ask which ones can be given this way.
Tablets that must not be crushed
Some tablets release the medicine slowly over the day, or have a coating that protects the stomach. Crushing them can release the whole amount at once or stop them working. Your doctor may switch you to a liquid or a different medicine. Never stop, start or change a medicine on your own because it is hard to give.
Who ready-made or home feeds may not suit
Tubes that end in the small bowel rather than the stomach usually take only ready-made feed through a pump. Very thin tubes, and tubes placed only a few days ago, may not suit home blends either.
What this page cannot do
It cannot tell you how much feed you need or which feed suits your reports. Only someone who has seen your weight, blood results and treatment plan can do that.
Questions we are asked
Common questions about what goes through a feeding tube
Can I put dal water or rice kanji through the PEG tube?
Thin, well-strained dal water or kanji will usually pass, but it carries very little protein or energy for its volume. If it replaces part of the planned feed, weight can drop without anyone noticing. Ask the dietitian whether and how to fit it in, rather than adding it on top or swapping it in.
Can I give tea or coffee through the tube?
Plain, cooled tea is sometimes allowed, but milky or sugary drinks can curdle and block the tube. Tea and coffee also do not count fully towards the water you need. If the person misses their tea, ask whether a small amount by mouth is safe, if they can still swallow.
Is tap water safe to use for flushing?
Use water that has been boiled and cooled, or water from a sealed bottle. Water from a filter at home is fine only if the filter is well maintained. Keep flushing water covered, and make fresh water each day rather than topping up yesterday's jug.
Can we give food by mouth as well as through the tube?
Often yes, if the person can swallow safely. Many people keep eating small amounts for taste and comfort while the tube does most of the work. If swallowing makes them cough or choke, stop and ask the team for a swallowing check before trying again.
What if the feed makes him vomit or have loose motions?
Slow the feed down, keep him sitting upright and call the team the same day. Do not stop all feeding for long without advice. The feed type, speed or timing may need to change. Vomiting with a swollen, hard or painful stomach needs to be seen urgently.
Can I mix the medicines together to save time?
No. Medicines mixed together can react, clump and block the tube, and some stop working. Give each one separately with a small flush of water between them. If there are many, ask the pharmacist whether the timings can be spread out or some can be given as liquids.
Can I add protein powder to the tube feed?
Not without asking. Extra powder thickens the feed, which blocks tubes, and too much protein can strain the kidneys in some people. If you are worried about weakness or weight loss, tell the dietitian. They can change the feed to one with more protein safely.
Who decides what goes through the tube after we go home?
The dietitian and the treating team set the plan, and it should be written down before you leave hospital. Keep that paper with the feeds. If anything changes, such as a new medicine or a new symptom, call the helpline and ask for the plan to be checked.
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Sources
- Cancer Research UK — Diet problems with cancer
- National Cancer Institute — Nutrition in Cancer Care (PDQ) - Patient Version
- Macmillan Cancer Support — Impacts of cancer: eating and drinking
- NICE — Nutrition support for adults (CG32)
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Feeding through the tube: how it is done at homeThe step-by-step feed routine for carersBlending Indian food for a feeding tubeIf you want to use home food safelyCommercial feeds vs home blends: cost and safetyWeighing tins against the kitchenTube blockage: preventing and clearing itWhat to do if the wrong thing blocks it
Talk to us
Not sure what is safe to give?
Call the helpline with the feed plan and the medicine list in front of you. A dietitian or nurse can check it with you. One helpline serves every CION centre.