Disrupted sleep is the most persistent post-deployment complaint and the one veterans most often try to fix on their own. The treatments that have the strongest evidence and the self-management practices that meaningfully reduce nightmare frequency.
Sleep disruption after deployment falls into recognizable patterns. Trouble falling asleep, frequent waking, early-morning waking with inability to return to sleep, and nightmares ranging from intermittent to nightly. Each pattern responds to different interventions. The mistake most veterans make is treating sleep as one undifferentiated problem, usually with alcohol or over-the-counter medications. Both produce short-term sedation and long-term worsening.
Cognitive behavioral therapy for insomnia, abbreviated CBT-I, is the first-line treatment for chronic insomnia and the one with the strongest research base. The protocol is six to eight weekly sessions covering sleep restriction, stimulus control, cognitive restructuring, and sleep hygiene. The sleep-restriction component is the part that does most of the work and the part that is hardest to follow — it temporarily reduces time in bed to consolidate sleep, which feels worse before it feels better. Veterans who complete the protocol generally see durable improvement that outperforms medication over the long term.
CBT-I is available through the VA in both in-person and telehealth formats. The CBT-i Coach app, developed by the VA's National Center for PTSD, is a free companion to clinician-delivered therapy and can also be used stand-alone. The app is not a replacement for the protocol but it covers the educational components and provides a sleep diary that most clinicians want patients to keep.
For nightmares specifically, imagery rehearsal therapy is the evidence-based protocol. The veteran rewrites a chosen nightmare in waking life, gives it a different ending, and rehearses the new version for several minutes a day. Over four to six weeks, the rewritten version tends to displace the original in dream content. The intervention is brief, does not require disclosure of detailed trauma content to the therapist, and has been studied in post-deployment populations specifically. It is taught at VA mental health clinics and is increasingly available in civilian practices.
Prazosin is the medication most often prescribed for post-traumatic nightmares. It is an alpha-blocker originally developed for blood pressure that reduces the adrenergic surges associated with nightmares. The evidence on prazosin is mixed — earlier studies were strongly positive, a large VA cooperative study published in 2018 found smaller effects than expected, and subsequent reviews have argued the average effect is real but smaller than initially claimed. Many veterans report meaningful benefit. Side effects are manageable for most users.
Obstructive sleep apnea is a frequent complicating factor. Veterans with neck-circumference or weight changes since service, who snore, or whose partners describe witnessed apneas should be screened. A home sleep study is sufficient for most cases and can be ordered through the VA. Untreated apnea fragments sleep severely enough that it can mimic or amplify PTSD-related sleep disturbance. Treating the apnea first — usually with CPAP — often reveals what is left as primary PTSD-related insomnia and what was secondary to the apnea.
Self-management changes that have decent evidence: consistent wake time across all seven days of the week, morning light exposure for ten to fifteen minutes, no alcohol within three hours of bed, no caffeine after noon, and the bedroom temperature set cooler than the rest of the house. Cannabis use is harder to assess. Short-term it can shorten sleep latency. Long-term and heavy use disrupts REM sleep and can worsen nightmare patterns when use stops. The research is still uneven.
Veterans Crisis Line is available twenty-four hours for anyone whose sleep problems are crossing into suicidal ideation. Dial 988 then press 1. Sleep deprivation is a documented amplifier of suicide risk and the line is staffed by responders trained to address both the immediate crisis and to connect to longer-term care.