Neurodiversity
& Substance Use

Cognitive access

Brain Injury and Substance Use

Acquired brain injury and substance use can interact in both directions. Injury may affect memory, inhibition, fatigue and decision-making, while intoxication can increase the risk of further falls, assault, overdose and missed healthcare.

Evidence reviewed 2 August 2026 · UK focus
01

Ask about hidden injury

A person may not use the words ‘brain injury’. Ask about falls, accidents, assaults, overdoses, loss of consciousness and periods of unexplained confusion.

02

Support memory outside the room

Write down one or two essential actions, use reminders and repeat consistently. Long verbal plans are particularly vulnerable to being lost when fatigue or stress rises.

03

Escalate new neurological symptoms

New severe headache, one-sided weakness, seizure, collapse, worsening confusion or loss of consciousness needs urgent medical assessment.

Evidence and scope

This page is educational and does not diagnose, replace individual clinical assessment, treatment, detoxification advice, safeguarding procedures or emergency care. Content is grounded in the 2026 publication and prioritises UK guidance and reputable evidence sources. See the editorial and evidence policy for scope and updates.

Read the editorial & evidence policy