Can the drugs that treat your asthma also influence your risk of dementia?

Cultures · Published 3 October 2026 Swipe more like this →

In short: Anticholinergic drugs are a broad class of medications used to treat everything from motion sickness and asthma to gastrointestinal disorders. By blocking the neurotransmitter acetylcholine, they calm involuntary muscle movements. However, this same mechanism that brings relief can also trigger complex side effects, particularly in the elderly population.

Anticholinergic agents function by inhibiting the parasympathetic nervous system, specifically by blocking acetylcholine from binding to its receptors in nerve cells. This action affects smooth muscles across the body, including those in the lungs, gastrointestinal tract, and urinary tract. Because of these effects, they are frequently prescribed for conditions ranging from COPD and bladder issues to nausea and even nerve agent poisoning.

The clinical utility of these drugs is balanced against a significant potential for adverse effects. Common issues include dry mouth, sedation, and, most notably, delirium. Older adults are particularly vulnerable to central nervous system side effects. Because many medications outside of this specific class can also produce anticholinergic effects, clinicians often use an 'anticholinergic burden' approach to assess the cumulative risk a patient faces from their entire regimen.

The relationship between these drugs and cognitive health is a subject of intense, evolving research. A 2025 study from the University of Nottingham indicated an increased risk of up to 50% for developing dementia associated with certain anticholinergic medications, including those for bladder control and psychiatric conditions. Yet, the picture is not entirely negative; a March 2025 study by Aguado and colleagues found that certain anticholinergic antihypertensive medications were linked to a 31% reduction in the 10-year risk of vascular dementia when used for six years or longer.

While acute anticholinergic syndrome is reversible, the long-term implications of these drugs remain a point of medical caution. Clinical guidelines currently suggest that physicians should carefully weigh the necessity of these prescriptions, particularly in older patients, and attempt to reduce usage where it is safe to do so. The conflicting data on dementia risk highlights the complexity of balancing immediate symptom management with long-term neurological health.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• Discovered in 1958, haloperidol remains a cornerstone of psychiatric care despite its significant risks.
• Beyond allergies: could antihistamines treat nausea, insomnia, and even depression?
• Beyond allergies, this first-generation antihistamine acts as a versatile, multi-purpose pharmacological tool.
• How do bronchodilators actually work to keep your airways open and breathing easy?
• Can inhaling plant molecules actually change your brain chemistry and emotional state?
• From ancient fertility symbols to 19th-century industrial uniforms
• The 8,000-year history of the ornament that traces social status and dance
• Why Arthur Shelby Jr. intentionally lost his childhood fights against his brother Thomas
• The ancient Egyptian ankh is more than a symbol; it is a linguistic puzzle.
• From religious offerings to global fashion, the complex lifecycle of hair extensions
• Why a giant inflatable pig once caused a panic over London's Heathrow Airport
• The Aryan race is a pseudoscientific concept with no basis in biological reality.

More in Clothing and fashion · More in Cultures · Latest · A–Z · All topics