Do quetiapine (Seroquel), lorazepam (Ativan), and buspirone (Buspar) cause nightmares, and can discontinuation of valproic acid (Depakote) increase nightmares?

Nightmares and Psychiatric Medications: Direct Answers

Can Seroquel, Ativan, and Buspar Cause Nightmares?

Yes, quetiapine (Seroquel) can cause nightmares and abnormal dreams, while lorazepam (Ativan) and buspirone (Buspar) have minimal to no association with nightmares.

Quetiapine (Seroquel)

Quetiapine is directly documented to cause nightmares and abnormal dreams. The FDA label explicitly lists "abnormal dreams" as an adverse reaction occurring in 2% of patients treated for bipolar depression, compared to 1% on placebo 1. Additionally, the label specifically notes that "nightmares" have been reported as adverse reactions in clinical trials with quetiapine 1.

Key mechanism: Drugs affecting norepinephrine, serotonin, and dopamine neurotransmitters can produce nightmares 2. Quetiapine significantly affects all three of these neurotransmitter systems, which explains its nightmare-inducing potential 3.

Lorazepam (Ativan)

Lorazepam, as a benzodiazepine affecting GABA, has only a possible association with nightmares 3. The evidence is weak and inconsistent. Benzodiazepines are generally not supported as causing nightmares in the literature 4.

Buspirone (Buspar)

Buspirone has no established association with nightmares in the available evidence. While it affects serotonin (5HT1A partial agonist), this mechanism alone does not reliably produce nightmares 5.

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Can Stopping Depakote Increase Nightmares?

Yes, discontinuing valproic acid (Depakote) can potentially increase nightmares through REM rebound, as it is a GABA-affecting agent.

The Mechanism

Withdrawal of drugs affecting GABA may be associated with nightmares 2. Valproic acid enhances GABAergic neurotransmission, and abrupt discontinuation can lead to:

• REM rebound: When REM-suppressing agents are withdrawn, there is often a compensatory increase in REM sleep intensity and duration 3, 6
• Increased dream vividness and nightmare frequency during this rebound period
• The guideline explicitly states: "The withdrawal of REM-suppressing agents and drugs which affect gamma-aminobutyric acid (GABA)...may also be associated with nightmares" 2

Clinical Implications

Important caveats:

• The long-term impact on nightmares after removal of the offending drug is unknown 2
• REM rebound effects are typically temporary, lasting days to weeks
• If nightmares persist beyond 2-4 weeks post-discontinuation, consider other causes

Practical Management Algorithm

If nightmares emerge or worsen after stopping Depakote:

1. Reassure that REM rebound nightmares are typically self-limited (2-4 weeks)
2. Avoid restarting valproate solely for nightmares given its reproductive toxicity concerns 7
3. Consider image rehearsal therapy - this is the only "recommended" (not just "may be used") treatment for nightmare disorder 2
4. If pharmacotherapy needed: Prazosin or low-dose quetiapine (50-150 mg) may be used for nightmare disorder 2, 8, though note the irony that quetiapine itself can cause nightmares in some patients
5. Monitor for 4 weeks before escalating treatment, as most withdrawal-related nightmares resolve spontaneously

Critical pitfall: Do not use clonazepam or venlafaxine for nightmare disorder - these are specifically "not recommended" by guidelines 2.