Increased dosages of quetiapine increase somnolence
the verdict
SUPPORTED
the evidence backs this
confidence 90/100
Clinical literature and pharmacological reviews consistently identify sedation and somnolence as well-established, dose-dependent adverse effects of quetiapine.
Evidence for · 3
Adjunctive Atypical Antipsychotic Treatment for Major Depressive Disorder: A Meta-Analysis of Depression, Quality of Life, and Safety Outcomes
2013 · cited by 280
Identifies sedation and somnolence as known adverse effects associated with quetiapine treatment.
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More for · 2
Update on extended release quetiapine fumarate in schizophrenia and bipolar disorders
2012 · cited by 17
Notes that somnolence and sedation are among the most common adverse events linked to quetiapine use across its formulations.
Sedation and sleep safety of pimavanserin for Parkinsons's disease psychosis: Review and exploratory analysis of clinical study data.
2025 · cited by 0
Indicates that quetiapine and other atypical antipsychotics carry an increased, dose-dependent risk of sedation and sleep-related adverse events like drowsiness.