ADHD and insomnia: what to know

People with ADHD may find it difficult to quiet racing thoughts, shift away from stimulating activities or keep a steady bedtime. Insomnia may involve trouble falling asleep, repeated waking or waking earlier than intended. Poor sleep can then intensify daytime sleepiness, irritability and difficulty concentrating, which may resemble or amplify daytime ADHD symptoms.

ADHD medication can sometimes delay sleep, especially when its effects continue into the evening, although untreated ADHD symptoms can also disrupt bedtime. Anxiety, depression, caffeine, an irregular schedule, restless legs and breathing problems during sleep are other possibilities worth considering. Do not stop or alter prescribed medication without guidance from the prescriber.

Keep a brief sleep diary recording bedtime, estimated time to fall asleep, awakenings, wake time, naps, caffeine and when medicines are taken. This can reveal patterns and gives a clinician concrete information for reviewing treatment.

Use a consistent wake time, build a short predictable wind-down routine, and move bright screens or highly engaging tasks away from bedtime. Keep caffeine earlier in the day and reserve the bed for sleep. If you remain awake and frustrated, get up for a quiet activity in dim light, then return when sleepy. Persistent insomnia may benefit from structured behavioural treatment tailored by a qualified clinician.

Arrange a routine appointment if sleep problems persist, impair work or study, or make driving unsafe. Mention loud snoring, choking or gasping during sleep, an uncomfortable urge to move the legs, major mood changes, or a clear link between insomnia and a medicine dose. These clues may change the assessment and treatment plan.

Seek urgent help for thoughts of self-harm, hallucinations, extreme agitation, confusion or behaviour that places you or someone else in danger. Avoid driving or operating machinery when severe sleepiness makes it hard to stay alert.

Ask whether the timing or duration of your ADHD medicine could be affecting sleep, whether another sleep disorder should be assessed, and which behavioural insomnia treatment is suitable. Also ask what changes to track and when the plan should be reviewed.