Sleep science

Alcohol, medication and dreams

The two things most likely to have changed your dreams recently, and why vivid dreams often arrive when you stop something rather than when you start.

7 min readbeginnerStrictly reviewed · cited

This page is general education, not medical advice. Never change prescribed medication because of something you read here: talk to whoever prescribed it.

Alcohol

Alcohol suppresses REM sleep in the first part of the night. As it is metabolised, REM rebounds, often producing a second half of the night that is fragmented, unusually vivid and frequently unpleasant.

This is why a heavy night produces both poor sleep and intense dreams, and why cutting down can increase dream vividness for a while before it settles.

Medication

A great many drug classes affect REM or dream content, including some antidepressants, some blood-pressure medications, and drugs used in Parkinson's disease. Stopping some of them produces REM rebound and a burst of vivid dreaming.

The general pattern worth knowing: suppress REM, and it comes back with interest.

REM rebound

After REM has been suppressed (by alcohol, medication or sleep deprivation) the body compensates with more REM than usual. Unusually vivid dreams after a period of poor sleep are usually this, not anything meaningful.

What to do with this

Log it. The sleep log has alcohol, caffeine and medication fields, and the pattern dashboard will show the correlation across weeks. That is a far better instrument than trying to remember whether last Tuesday was different.

Sleep-science pages summarise published research for general education. They are not a substitute for a clinician. If a sleep problem is affecting your health, speak to a doctor, and never change prescribed medication because of something you read here.

Sources and reviewed references

3 references. What these labels mean

  1. 1.Nightmares: A New Neurocognitive ModelPeer-reviewed research

    Tore Nielsen and Ross Levin (2007) · Sleep Medicine Reviews

    Cited for: A model of nightmare production combining affect load and affect distress, and the distinction between bad dreams and nightmares proper.

  2. 2.The Scientific Study of Dreams: Neural Networks, Cognitive Development and Content AnalysisAcademic book

    G. William Domhoff (2003) · American Psychological Association

    Cited for: The continuity hypothesis (that dream content largely reflects waking concerns) and a sustained critique of symbolic dream interpretation as an evidential method.

  3. 3.Gender Differences in Dream Recall: A Meta-AnalysisPeer-reviewed research

    Michael Schredl and Iris Reinhard (2008) · Journal of Sleep Research

    Cited for: Dream-recall frequency as a measurable, individually stable trait, and the factors that move it.