What Actually Helps Stop Nightmares? Evidence-Based Approaches That Work.
Nightmares are rooted in brain function, stress, and emotional memory. Due to advances in nightmare research, we now know that there are scientifically supported techniques that can reduce nightmares.
Over the past several decades, researchers have studied multiple approaches to reducing nightmare frequency and intensity.
Here’s what the science actually supports.
Jump to: IRT · Exposure Therapy · Lucid Dreaming · Combined Treatment · Medication · What Doesn’t Work · More Than Sleep · Why It Works
Imagery Rehearsal Therapy (IRT)
The most strongly supported treatment for chronic nightmares
Imagery Rehearsal Therapy is the most studied and best-supported treatment for recurrent nightmares. It involves rewriting the nightmare while awake and mentally rehearsing the new version regularly.
A review of nine controlled studies (437 participants) found that nightmare-focused cognitive behavioral therapy—including IRT—produced very large reductions in nightmare frequency (Lancee et al., 2008).
IRT holds the highest recommendation level from the American Academy of Sleep Medicine (AASM Level A) as the treatment of choice for nightmare disorder, including PTSD-associated nightmares (Albanese et al., 2022).
In one study of 62 crime victims with PTSD, IRT significantly reduced nightmare frequency, improved sleep quality, and reduced PTSD symptoms (Krakow et al., 2001). Those gains were not just temporary. Follow-up studies have found improvements lasting up to 18–30 months after treatment (Spoormaker et al., 2006).
IRT works across populations. Research has shown significant results in crime victims (Krakow et al., 2001), combat veterans (Swanson et al., 2009; Margolies et al., 2013), sexual abuse survivors, and even children and adolescents (Albanese et al., 2022).
How IRT Works
The goal is not to suppress or ignore the nightmare. IRT introduces new information that contradicts the fear and dread of a nightmare. This change is something that spontaneous nightmares consistently fail to provide (Rothbaum & Mellman, 2001).
The patient practicing IRT actively reshapes the narrative of the nightmare during waking hours. They can change whatever they want, giving the nightmare a more positive ending, or modifying the dream so that whatever normally triggers the nightmare doesn’t occur. The idea behind this method is that these changes carry over into the patients dreams at night.
Patients approach rescripting in different ways. In one study, 58% created alternative endings, 23% inserted positive images, 13% transformed threatening elements, and 10% inserted reminders that they were dreaming (Albanese et al., 2022). There is no single correct method. What matters is actively modifying the script.
Research also suggests that focusing on the central theme of the nightmare—rather than peripheral details—predicts better treatment outcomes (Albanese et al., 2022).
Interestingly, 37 of 62 participants in one study reported using imagery rehearsal for daytime distress as well. This suggests that the technique has utility beyond nighttime (Krakow et al., 2001).
Why IRT Works
Across multiple studies, mastery—shifting from helplessness to a sense of control over one’s dream life—is identified as the most common and best-supported explanation for why IRT works (Albanese et al., 2022).
Nightmares activate fear and can lock the dreamer in an endless cycle. Often the dreamer does not choose to confront the memory. The dream feels real and dangerous, and waking up interrupts the process before the fear has a chance to subside on its own (Rothbaum & Mellman, 2001).
IRT supplies the sense of safety and control that nightmares cannot provide, succeeding precisely where nightmares fail.
Honest Limitations of IRT
IRT does not work equally well for everyone.
In one study of war veterans, nightmare frequency showed only a 10% reduction. Half of the veterans in the study could not fully engage with the rescripting process (Margolies et al., 2013). However, IRT was introduced in the first session before a trusting relationship with the therapist had been established, which may have contributed to the difficulty. Given that IRT requires the patient to engage with nightmare content, a trusting relationship with the therapist can be very important.
Some other studies have reported that about 1 in 4 participants dropped out, and that treatment benefits sometimes took 3–6 months to fully appear (Albanese et al., 2022). However, there are also cases where patients see drastic results in as little as one session.
IRT is the best-supported treatment available. But the size and timing of improvement varies, and engagement can be a real barrier—particularly for people with severe trauma avoidance.
Exposure Therapy for Nightmares
Some treatments use controlled exposure to the nightmare memory rather than rescripting it.
Therapeutic exposure is voluntary, occurs in a safe environment, continues long enough for anxiety to decrease, and allows new learning to take place. This gives patients a contrast to their spontaneous nightmares at night.
In controlled studies, exposure-based methods showed the largest improvements of any nightmare treatment and have been validated by three independent research groups, meeting professional criteria for a “well-established” treatment (Lancee et al., 2008).
In one direct comparison, exposure-based treatment and IRT were equally effective (Lancee et al., 2008).
Lucid Dreaming Therapy (LDT)
Lucid Dreaming Therapy teaches people to recognize when they’re dreaming and encourages them to alter the dream in real time. Knowing that this is possible can be helpful for those stuck in nightmare cycles.
In one clinical study, nightmare frequency decreased from 2.31 to 0.88 per week—a reduction of more than 60% (Spoormaker et al., 2003). Achieving lucidity can prove elusive though. Only about 1 in 3 participants in the study actually achieved lucidity. Interestingly, 3 out of 4 still showed overall improvement. This suggests that the benefit may come from engaging with dream content and developing a sense of agency rather than from lucidity itself. Once again, this goes back to the theme of mastery in regards to nightmare reduction.
A later controlled study tested lucid dreaming therapy with PTSD patients and found that it did not significantly reduce nightmare frequency. Only 2 of 20 participants achieved lucidity. Importantly, however, the intervention did reduce anxiety and depression (Holzinger et al., 2020).
The evidence for lucid dreaming therapy is promising but preliminary. It may be best understood as one tool among several rather than a standalone treatment.
As noted in the research, a sense of mastery and confidence about nightmares may be even more important than the specific technique used (Spoormaker et al., 2006). Feeling like you have some control over your nightmares appears to matter as much as the method itself.
Treating Nightmares and Insomnia Together
Nightmares rarely occur in isolation. They are often accompanied by difficulty falling asleep, frequent awakenings, and hyperarousal at night. Among people with chronic nightmares, 70–91% also suffer from insomnia (Margolies et al., 2013).
When insomnia is also present, combining insomnia treatment (CBT-I) with nightmare-focused treatment can produce stronger results.
In one study of combat veterans with an average of 31 years of insomnia, combined treatment led to approximately 50% reduction in nightmare frequency, 46% reduction in nightmare distress, and large improvements in sleep quality (Swanson et al., 2009).
In a larger controlled study, 75% of veterans achieved normal sleep quality after combined treatment compared to 21% in the control group. Sleep-focused treatment also significantly reduced PTSD severity, depression, and mood disturbance—while the group that received no treatment actually got worse (Margolies et al., 2013).
An important finding: distress often drops before frequency does. In one study, how much nightmares bothered people improved dramatically, while how often they occurred improved only moderately (Swanson et al., 2009). Nightmares may still occur—but feel less overwhelming. That shift alone can restore a sense of control.
Medication
Some medications have been studied for nightmare reduction.
Prazosin showed benefit in multiple earlier studies and was once considered the most effective medication for nightmares (Hasler & Germain, 2009). However, a large 2018 VA multi-site study found no significant benefit for prazosin over placebo—meaning the evidence is now mixed rather than clearly positive. Symptoms also often return when the medication is stopped.
Other medications that have been tested and have not shown consistent benefit include benzodiazepines, guanfacine, and cyproheptadine—which in one study was found to potentially make nightmares worse (Hasler & Germain, 2009).
Interestingly, medications that change REM sleep do not necessarily change dreaming, and medications that change dreaming often have no effect on REM sleep. The medications that most effectively reduce nightmares work by affecting the stress hormone norepinephrine, not by changing sleep stages (Pagel & Pandi-Perumal). This is likely due to amygdala overactivation, and medication’s ability to reduce that activity.
Medication can reduce symptoms for some individuals, but behavioral treatments appear to produce longer-lasting changes.
What Does Not Work for Chronic Nightmares
General sleep hygiene alone is usually not enough for chronic nightmares. While good sleep habits matter, they do not directly change the fear patterns driving the dreams.
Similarly, simply waiting for nightmares to resolve without targeted intervention is less effective for long-standing cases. Research shows that while approximately 71% of trauma-related nightmares resolve within 12 months, about 29% persist for three years or longer (Wittmann et al., 2007).
Avoidance and suppression do not work. Improvement requires techniques and structure.
Nightmare Reduction Improves More Than Sleep
Reducing nightmares helps more than just your sleep.
Research shows that when nightmares are successfully treated, daytime energy increases, sleep quality improves, and PTSD symptom severity decreases (Germain & Zadra, 2009). Nightmares also independently contribute to overall PTSD severity, alcohol use, and reduced quality of life—suggesting their impact extends well beyond the nighttime hours (Germain & Zadra, 2009).
In some cases, nightmares may function as a primary sleep disorder rather than merely a symptom of another condition—meaning that directly targeting nightmares can create broader psychological improvement.
What Actually Makes These Approaches Work?
Across these methods, mastery is the theme that appears repeatedly.
Nightmares become less powerful when:
- The dreamer feels capable and in control.
- The nightmare storyline can be altered.
- The fear response is interrupted.
- The learned expectation of helplessness (nightmare feedback loop) changes.
Structured techniques work not because they are mystical—but because they change how the brain anticipates and processes threat during sleep.
Learning what to do and practicing it consistently is what changes outcomes.
In the short term, knowing what to do after a nightmare can prevent reinforcing the cycle overnight.
You Don’t Have to Feel Helpless at Night
One theme appears again and again in the research: mastery matters.
Nightmares lose power when the dreamer no longer feels powerless.
When you know what to do, you can influence the outcome.
When your nervous system no longer anticipates helplessness, you can be empowered to make that shift.
If you’d like structured guidance for building a better nightmare response—including exactly what to do when you wake from a nightmare—I’ve created a printable bedside instruction sheet for exactly that moment.
I’ve also included a five minute audio recording in case you’d rather listen on your phone when you need to.
Because the goal isn’t just fewer nightmares (although that can happen too).
It’s gaining the confidence that when they happen you’ll know exactly what to do.
References
- Albanese, M., Liotti, M., Cornacchia, L., & Mancini, F. (2022). Nightmare rescripting: Using imagery techniques to treat sleep disturbances in post-traumatic stress disorder. Frontiers in Psychiatry, 13, 866144.
- Germain, A., & Zadra, A. (2009). Dreams and nightmares in PTSD. In L. R. Squire (Ed.), Encyclopedia of Neuroscience (Vol. 3, pp. 655–661). Oxford: Academic Press/Elsevier.
- Hasler, B. P., & Germain, A. (2009). Correlates and treatments of nightmares in adults. Sleep Medicine Clinics, 4(4), 507–517.
- Holzinger, B., Saletu, B., & Klösch, G. (2020). Cognitions in sleep: Lucid dreaming as an intervention for nightmares in patients with posttraumatic stress disorder. Frontiers in Psychology, 11, 1826.
- Krakow, B., Johnston, L., Melendrez, D., Hollifield, M., Warner, T. D., Chavez-Kennedy, D., & Herlan, M. J. (2001). An open-label trial of evidence-based cognitive behavior therapy for nightmares and insomnia in crime victims with PTSD. American Journal of Psychiatry, 158(12), 2043–2047.
- Lancee, J., Spoormaker, V. I., Krakow, B., & van den Bout, J. (2008). A systematic review of cognitive-behavioral treatment for nightmares. Journal of Clinical Sleep Medicine, 4(5), 475–480.
- Margolies, S. O., Rybarczyk, B., Vrana, S. R., Leszczyszyn, D. J., & Lynch, J. (2013). Efficacy of a cognitive-behavioral treatment for insomnia and nightmares in Afghanistan and Iraq veterans with PTSD. Journal of Clinical Psychology, 69(10), 1026–1042.
- Pagel, J. F., & Pandi-Perumal, S. R. Dreaming and sleep disorders. Book chapter manuscript.
- Rothbaum, B. O., & Mellman, T. A. (2001). Dreams and exposure therapy in PTSD. Journal of Traumatic Stress, 14(3), 481–490.
- Spoormaker, V. I., Schredl, M., & van den Bout, J. (2006). Nightmares: From anxiety symptom to sleep disorder. Sleep Medicine Reviews, 10(1), 19–31.
- Spoormaker, V. I., van den Bout, J., & Meijer, E. J. G. (2003). Lucid dreaming treatment for nightmares: A series of cases. Dreaming, 13(3), 181–186.
- Swanson, L. M., Favorite, T. K., Horin, E., & Arnedt, J. T. (2009). A combined group treatment for nightmares and insomnia in combat veterans. Journal of Traumatic Stress, 22(6), 639–642.
- Wittmann, L., Schredl, M., & Kramer, M. (2007). Dreaming in posttraumatic stress disorder: A critical review. Psychotherapy and Psychosomatics, 76(1), 25–39.