Does caffeine cause nightmares? Here's what the experts say

2025-11-29 21:28:02, Shëndeti CNA

Caffeine is perhaps the most famous ingredient in the world because it is the main ingredient in a product that is used very often, such as coffee.

Caffeine is very popular because it has a stimulating effect on the brain and regenerates the entire body.

However, it is also known for its negative effects because it can make you hyperactive or increase blood pressure in some people.

Another problem you may encounter with excessive caffeine is apparently the nightmares you experience at night.

Caffeine stimulates the nervous system, so it tells your brain when to be more active.

These functions in the brain explain why after consuming a cup of coffee you may feel more alert than usual.

Although you usually take this ingredient in the morning, traces of caffeine can remain in your brain for a long time.

If there are traces of caffeine in your system by dinnertime, your brain will have higher activity than usual which won't necessarily prevent you from sleeping, but it may make you more prone to nightmares.

This happens because the brain has difficulty fully relaxing itself, which is what you normally experience when you sleep soundly. Caffeine makes you stay in the dreaming phase longer, which results in more nightmares.

Caffeine stimulates the production of the stress hormone cortisol. In a 2005 study published in Psychomatic Medicine, caffeine stimulation gives you the advantage of being more alert, but it also makes you more stressed.

This can especially happen if you consume a lot of caffeine during the day. Experiencing stress makes you more prone to experiencing nightmares, according to MedlinePlus.

In general, the presence of caffeine in the body during sleep hours causes you to have an uneasy sleep pattern. It significantly reduces the quality of sleep, which then leads to all the consequences such as stress or insomnia and the inability to relax at night.

Another side effect of caffeine is insomnia, which then causes anxiety, fatigue, and affects your daily life.

To avoid all the problems mentioned above, try not to have any traces of caffeine in your body during dinner.

Start by eliminating caffeine after lunch about 4-8 hours before you go to sleep.

And if you are very sensitive to caffeine, you can avoid it up to 12 hours before going to sleep.