Dysphagia — Swallowing Difficulty
NICE guidance on managing swallowing problems across stroke, Parkinson's, dementia, and more
Dysphagia means difficulty swallowing. It affects patients across many different conditions and is more common than people realise. Whether caused by stroke, Parkinson's disease, dementia, or head and neck cancer, swallowing difficulties create serious risks — including aspiration pneumonia, malnutrition, and problems taking medicines safely. Careful evaluation and a team-based approach are essential.
What is Dysphagia?
Dysphagia refers to difficulty swallowing and can range from mild discomfort to a complete inability to swallow safely. There are two main types. Oropharyngeal dysphagia involves a problem in the mouth or throat phase of swallowing and is most common in neurological conditions such as stroke, Parkinson's disease, and dementia. Oesophageal dysphagia involves a problem in the oesophagus and is more commonly caused by structural problems such as stricture or cancer. The most serious risk associated with dysphagia is aspiration — where food or liquid enters the airway instead of the oesophagus — which can lead to aspiration pneumonia. This is a leading cause of death in advanced Parkinson's disease and dementia.
Who is Affected?
Dysphagia can occur at any age but is most common in older adults and those with neurological or structural conditions. Stroke affects up to 65% of patients in the acute phase. Parkinson's disease is associated with swallowing problems in up to 80% of patients — often without the patient being aware (silent aspiration). Advanced dementia progressively impairs swallowing as the disease affects brain function. Head and neck cancer, motor neurone disease, multiple sclerosis, and cerebral palsy are other important causes. All patients with swallowing concerns should be referred to a Speech and Language Therapist (Speech and Language Therapist) for formal assessment.
Modified Texture Food and Fluid
The IDDSI (International Dysphagia Diet Standardisation Initiative) framework is the UK national standard for texture and fluid modification. Foods are graded from Level 7 (Regular) down to Level 3 (Liquidised). Fluids are graded from Level 0 (Thin) up to Level 4 (Extremely Thick). Speech and Language Therapist prescribes the appropriate level for each patient based on their assessment. Commercial thickeners — such as Nutilis Clear or Thick and Easy — are used to modify drinks. Thickeners can sometimes affect how quickly medicines are absorbed, so pharmacists should be consulted when patients are prescribed medicines alongside thickened fluids.
Medicines in Dysphagia — Key Principles
Managing medicines in patients with dysphagia is a core pharmacist responsibility. Always check the BNF or Summary of Product Characteristics before crushing or dispersing a tablet — not all tablets are safe to alter. Modified-release tablets (labelled MR, XL, SR), enteric-coated tablets, cytotoxic medicines, and hormonal preparations should never be crushed. Suitable alternatives include liquid formulations, dispersible or soluble tablets, orodispersible tablets, transdermal patches, subcutaneous injections, and suppositories. In patients who lack capacity, medicines given covertly (hidden in food or drink) require a Best Interests decision under the Mental Capacity Act 2005, documented by the MDT with pharmacist input.
Red Flags and When to Act
Sudden new dysphagia should always prompt immediate investigation to exclude stroke using the FAST assessment. Progressive dysphagia with unintentional weight loss in a patient without a known cause requires an urgent two-week wait cancer referral. In patients with known Parkinson's disease, any delay in their essential medications — including during a hospital admission — must be escalated to the prescriber immediately, as missed doses can cause acute and dangerous deterioration. Aspiration pneumonia in a patient with known swallowing difficulties requires urgent antibiotic treatment and medical review. Careful evaluation of swallowing safety should be completed before any food, drink, or medicines are given.