Journal
JOURNAL OF ALZHEIMERS DISEASE
Volume 95, Issue 2, Pages 677-685Publisher
IOS PRESS
DOI: 10.3233/JAD-230494
Keywords
Alzheimer's disease; frontotemporal dementia; pharmacology; psychiatry; psychopharmacology; therapeutics
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Patients with frontotemporal dementia (FTD) often receive psychiatric misdiagnoses and are treated with off-label psychopharmacological medications prior to diagnosis. Female gender and behavioral variant of FTD phenotype alongside with depressive and psychotic symptoms are associated with the use of these medications.
Background: Due to the significant presence of neuropsychiatric symptoms in patients with frontotemporal dementia (FTD) spectrum disorders, psychiatric misdiagnoses, diagnostic delay, and use of psychiatric treatments are common prior to the FTD diagnosis. Furthermore, treatment of diagnosed FTD patients mainly relies on off-label psychopharmacological approaches. Currently, limited real-world data are available regarding the actual use of psychopharmacological medications in FTD. Objective: To evaluate psychopharmacological medication use at the time of FTD diagnosis. Methods: Psychopharmacological medication use was evaluated in a Finnish FTD cohort containing 222 FTD patients, including the major clinical disease phenotypes (behavioral, language, and motor variants) and genetic patients carrying the C9orf72 repeat expansion. A cohort of 214 Alzheimer's disease (AD) patients was used as a neurodegenerative disease reference group. Results: Active use of psychopharmacological medications at the time of diagnosis was significantly more common in FTD compared to AD, especially in the case of antidepressants (26.1% versus 15.0%, OR= 2.01, p = 0.008), antipsychotics (23.9% versus 9.3%, OR= 3.15, p < 0.001), and mood-stabilizers (6.3% versus 1.9%, OR= 2.93, p = 0.085; not statistically significant), whereas the use of cholinesterase inhibitors or memantine was nearly nonexistent in FTD patients. Female gender and behavioral variant of FTD phenotype alongside with depressive and psychotic symptoms were the most prominent factors associating with the use of these medications among the FTD spectrum patients. Conclusion: Use of off-label psychopharmacological medication and polypharmacy is substantially common at the time of FTD diagnosis. This likely reflects the challenges in using symptom-driven treatment approaches, especially prior to the eventual diagnosis.
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