You can’t completely stop dreaming, but you can significantly reduce how much you remember your dreams and how vivid or disturbing they feel. Dreaming happens primarily during REM sleep, a phase your brain cycles through multiple times each night. Since REM sleep plays a role in memory processing and emotional regulation, eliminating it entirely isn’t realistic or healthy. What you can do is target the factors that make dreams more frequent, more vivid, or more distressing.
Why You Dream in the First Place
Dreaming is tied to REM sleep, which is controlled by a network of structures deep in your brainstem. A region called the sublaterodorsal nucleus acts as a kind of ignition switch for REM sleep, ramping up activity right before each REM cycle begins. Several chemical messengers help regulate when REM turns on and off: serotonin and norepinephrine help suppress REM during waking hours, while acetylcholine helps trigger it during sleep. Another chemical, orexin, stabilizes the boundary between REM-on and REM-off states, preventing your brain from slipping into dream sleep at the wrong time.
Your brain doesn’t dream at a constant rate through the night. REM cycles get longer and more intense as morning approaches, which is why your most vivid dreams tend to happen in the last few hours of sleep. If you’re sleeping longer than usual, you’re spending more time in these late-stage REM periods, and you’ll recall more dreams as a result.
Substances That Suppress Dreams
Several substances reduce REM sleep and, with it, dream recall and intensity. Cannabis is one of the most well-known. THC suppresses REM sleep and increases deep sleep, which is why regular users often report not dreaming at all. In studies of current cannabis users, REM sleep dropped to about 17.7% of total sleep time (compared to a typical 20-25%), and it took significantly longer to enter the first REM cycle.
Alcohol has a similar effect in the short term. Drinking before bed suppresses REM sleep in the first half of the night, and the number of eye movements during REM (a marker of dream intensity) drops measurably even at moderate blood alcohol levels. But this comes with a catch: as alcohol metabolizes overnight, REM sleep can rebound in the second half of the night, sometimes producing fragmented, vivid dreams toward morning.
Certain antidepressants, particularly SSRIs and SNRIs, also suppress REM sleep as a side effect. Some people prescribed these medications notice a dramatic drop in dream recall. This isn’t a reason to take antidepressants for dreaming alone, but if you’re already on one and noticing fewer dreams, that’s a known pharmacological effect.
The REM Rebound Problem
Here’s the important caveat: any substance that suppresses REM sleep creates a debt your brain will try to repay. When you stop using cannabis, alcohol, benzodiazepines, or antidepressants, your brain compensates with a surge of extra REM sleep. This is called REM rebound. It produces longer, more frequent, and often intensely vivid dreams. People going through cannabis withdrawal, for example, commonly report dreams so vivid they feel hallucinatory. The same happens after stopping antidepressants abruptly.
REM rebound can also cause disorientation on waking, confusion, and headaches. It typically resolves on its own over days to weeks, but it means that using substances to suppress dreams is a short-term fix that often backfires.
Reduce Dream Vividness Without Substances
If your goal is fewer vivid or memorable dreams, several lifestyle adjustments can help without creating a rebound cycle.
Check your supplements. Vitamin B6 is linked to increased dream recall. A double-blind, placebo-controlled study found that taking 240 mg of B6 before bed for five days significantly increased how much dream content participants remembered. If you’re taking a B-complex supplement or a multivitamin with high B6 levels, especially in the evening, try moving it to the morning or reducing the dose.
Shorten your sleep window slightly. Since REM periods grow longer toward morning, sleeping 7 hours instead of 9 means you’re cutting into the most dream-heavy portion of the night. This doesn’t mean you should deprive yourself of sleep, but if you’re consistently sleeping well beyond what you need, trimming back can reduce the raw amount of dreaming you experience.
Avoid screens and stimulating content before bed. Emotionally charged material, whether it’s a stressful news cycle, a horror film, or an intense argument, gives your brain more raw material to process during REM sleep. A calming pre-sleep routine lowers the emotional temperature your dreaming brain has to work with.
Optimize your sleep environment. Keeping your bedroom dark, quiet, and cool promotes more stable sleep architecture with fewer awakenings. Every time you briefly wake during the night, you’re more likely to catch a dream in progress and remember it. White noise machines and blackout curtains reduce the micro-awakenings that transfer dreams into conscious memory.
Stop Writing Dreams Down
This one is counterintuitive if you’ve been keeping a dream journal, but dream recall is a trainable skill. The more attention you pay to your dreams upon waking, the better your brain gets at flagging them for memory storage. If you want to remember fewer dreams, do the opposite: when you wake up, immediately focus on something concrete like the day ahead, your to-do list, or getting out of bed. Don’t lie still replaying what you just dreamed. Over time, your brain deprioritizes dream memories, and recall fades.
When the Problem Is Nightmares Specifically
If the dreams you want to stop are nightmares rather than just vivid dreams, you have more targeted options. Imagery Rehearsal Therapy (IRT) is one of the most effective. It works by having you rewrite a recurring nightmare while you’re awake. You recall the nightmare, then consciously change the storyline to something neutral or positive, and rehearse the new version in your mind for 10 to 20 minutes a day. Over time, this new script replaces the original nightmare during sleep. The technique works by progressively weakening the emotional charge of the original dream content and substituting it with less distressing imagery.
Some variations of this approach add relaxation techniques like progressive muscle relaxation or brief nightmare exposure exercises. IRT is well-studied for trauma-related nightmares and can be done with a therapist or through guided self-help programs.
For severe, trauma-related nightmares that don’t respond to behavioral approaches, a blood pressure medication called prazosin has shown consistent results. Originally developed for hypertension, it blocks a specific stress-related receptor that appears to drive nightmare generation. In clinical studies, roughly 78% of patients experienced improvement, and some trials found over 85% of participants were rated as markedly improved. Doses typically start at 1 mg before bed and are gradually increased based on response. Prazosin is not FDA-approved specifically for nightmares, but it is widely prescribed off-label for this purpose, particularly in people with PTSD.
What You Can’t (and Shouldn’t) Eliminate
Complete dream suppression would require eliminating REM sleep, which isn’t something you can do safely. REM sleep supports memory consolidation, emotional processing, and brain maintenance. People deprived of REM sleep in laboratory settings develop irritability, difficulty concentrating, and worsening mood within days. The goal isn’t zero dreams. It’s reducing the ones that bother you to a level where they stop interfering with your sleep quality and your waking life.
For most people, the combination of adjusting sleep timing, cleaning up the pre-bed routine, reducing B6 intake if it’s elevated, and retraining dream recall habits produces a noticeable drop in how often vivid dreams intrude on their mornings. If nightmares are the core problem, IRT or a conversation with a doctor about prazosin offers a more direct path.