The invention provides a composition for preventing or treating neurodegenerative diseases and a use method thereof. The composition comprises a
phosphodiesterase-5 (PDE-5) inhibitor and an anti-diabetes therapeutic agent comprising a
sodium-glucose
cotransporter 2 (SGLT2) inhibitor and a
dipeptidyl peptidase-4 (PPD-4) inhibitor; wherein the PDE5 inhibitor is selected from the group consisting of mironafil,
sildenafil,
vardenafil,
tadalafil, udenafil, dabigatafil,
avanafil, pharmaceutically acceptable salts, solvates, hydrates, and mixtures thereof; and the SGLT2 inhibitor is selected from the group consisting of
canagliflozin,
dapagliflozin,
empagliflozin, ertugliflozin, ipagliflozin, luseogliflozin, tofogliflozin, repagliflozin etabate, sersegliflozin etabate, pharmaceutically acceptable salts, solvates, hydrates, and mixtures thereof; and the neurodegenerative
disease is selected from the group consisting of
dementia, Parkinson's
disease (PD),
dementia with Lewy bodies (DLB), Alzheimer's
disease (AD), Huntington's disease (HD),
multiple sclerosis (MS), vascular
dementia (VaD),
amyotrophic lateral sclerosis (ALS),
frontotemporal dementia or a mixed cause thereof.