Dysphagia & Thickened Fluids: A Carer’s Guide (IDDSI Levels)

When a speech pathologist recommends thickened fluids, IDDSI levels are the shared language that tells everyone exactly how thick each drink should be. For a carer, that number matters with every cup of tea and glass of juice. This guide explains dysphagia in plain terms, what each International Dysphagia Diet Standardisation Initiative (IDDSI) drink level means, why the level comes from a clinician, and how pre-thickened drinks compare with thickener powder.

Allcare Warehouse supplies thickened drinks and thickener powder as part of its wider nutrition and feeding range, with many of the drinks made by Flavour Creations. You can call the team or come into the Liverpool showroom with the level written on your speech pathologist’s advice, and the product details below are quoted from each listing.

What dysphagia means for drinking

Healthdirect describes dysphagia as difficulty swallowing solids and liquids, including problems with drinking, chewing, eating, controlling saliva and taking oral medicines. Signs include coughing or clearing the throat during or after eating and drinking, food or drink going down the ‘wrong way’, and taking more than 30 minutes to eat a meal. Conditions that can cause it include stroke, Parkinson’s disease, motor neurone disease, dementia and cerebral palsy.

The same page notes that treatment can include changing the textures of food and drinks, and that without proper management dysphagia can lead to dehydration, malnutrition and aspiration, where food or drink goes into the airways instead of the stomach. Aspiration can lead to pneumonia. Thickening is one way to manage this: IDDSI’s own definitions describe thicker levels as useful when thin drinks flow too fast to be controlled safely.

Thickened fluids: IDDSI drink levels 0 to 4

The IDDSI framework has eight levels, numbered 0 to 7, and drinks are measured on Levels 0 to 4. Each drink level has a name as well as a number, and IDDSI’s detailed level definitions describe them like this:

• Level 0 Thin: flows like water, with a fast flow.
• Level 1 Slightly Thick: thicker than water and takes a little more effort to drink than thin liquids, but still flows through a straw, syringe or teat.
• Level 2 Mildly Thick: is sippable and pours quickly from a spoon, but more slowly than thin drinks, with mild effort needed to drink it through a standard straw.
• Level 3 Moderately Thick: can be drunk from a cup or eaten with a spoon, needs moderate effort to suck through a straw, and drips slowly in dollops through the prongs of a fork.
• Level 4 Extremely Thick: usually eaten with a spoon, cannot be drunk from a cup or sucked through a straw, and holds its shape on a plate.

Use the number and the name together when you talk to family, respite staff or a pharmacist, so nobody confuses one level with another.

Why a speech pathologist sets the level

Speech pathologists are university-qualified allied health professionals who assess, diagnose and support people with communication and swallowing needs, and Healthdirect notes that a doctor may refer someone to a speech pathologist for a swallowing assessment. The IDDSI framework page puts the responsibility on the clinician to recommend foods or drinks for a particular person, based on a comprehensive clinical assessment. It also cautions that errors in diet texture or drink selection have previously been associated with adverse events, including choking and death.

So a carer should not move someone up or down a level because a drink looks too thick or too thin. If the person coughs more with drinks, starts refusing them or seems to struggle, ask the speech pathologist or GP for a review.

The level on the speech pathologist’s advice is the level in the cup, every time.

Pre-thickened drinks or thickener powder

Ready-to-drink thickened drinks

Pre-thickened drinks come already mixed to one level, so there is nothing to measure. In the range, Flavour Creations makes water, pear juice, raspberry and citrus cordials, a white coffee and Pro Lemon Lime and Pro Caramel drinks (each described as having 15 g of protein) in 175 mL single serves, at Levels 2, 3 or 4 depending on the flavour, mostly in cartons of 24. Many come in the maker’s Dysphagia Cup, described as having a sloped rim, an easy-peel lid and textured sides for people with reduced grip strength.

Check that the level printed on the product matches the written advice, and follow the storage directions. The Thickened Creamy Dairy listing, for example, says to cover and refrigerate an opened drink with a lid and label, and to discard unused content after 24 hours.

Thickener powder

A thickener powder lets you thicken drinks the person already enjoys. Flavour Creations Instant Thick (100 g) is described as suitable for hot or cold foods and liquids, including fruit juices, soups and nutritional supplements, added to achieve the required consistency. The instant THICK™ sachets are single serves made to Level 3 Moderately Thick from xanthan gum, with no need to measure, which the listing says suits outings, family visits and travel. With any powder, follow the directions on the pack for the level that has been prescribed.

Safety checks at home

For thickened fluids, IDDSI says testing should be done under the intended serving conditions, especially temperature, and notes that its flow test is sensitive enough to show small changes in thickness with serving temperature. Check a drink as it will actually be served.

The cup matters too. The eating and kitchen aids range includes a Dysphagia Cup, feeding cups with spouted lids and two-handled mugs, so ask the speech pathologist which style suits before adding a spout or straw. Healthdirect also notes that in severe cases, food and drink can be given through a feeding tube that goes directly into the stomach; if the treating team has set this up, tubes, giving sets and formulas are in the enteral feeding supplies range. For other mealtime help, our guide to cutlery for weak grips covers adapted utensils, and the carer equipment guide looks at aids that make daily care easier.

Know when to get help. Healthdirect advises seeing a doctor as soon as possible for trouble swallowing solids and liquids, regurgitation or breathing difficulties when eating or drinking, or the feeling that food is stuck in the throat or chest. Difficulty swallowing can be a sign of stroke, so if you suspect a stroke, call triple zero (000) immediately and ask for an ambulance.

Frequently Asked Questions

Keeping every drink at the right level

Getting thickened fluids and IDDSI levels right at home is mostly about routine. Keep the speech pathologist’s written level where everyone who makes drinks can see it, including visitors and respite staff, label opened drinks with the time, and ask for a review whenever swallowing seems to change.