There is no cure for dementia. but a doctor might prescribe a combination of medications to slow down any further degradation and medication to treat some of the symptoms (Sorry for the bad English)
I agree with my colleague, there is no permenant cure but some meds nowadays, provide some relief of symptoms and prevent further damage. Seeing a neurologist would be beneficial 👍
Dementia is the result of a disease, some are reversible, some are incurable and progressive. Eg hydrocephalous dementia is reversible with a CSF valve. Alzheimer's or vascular dementia are not. For the non-curable ones, treatment is focused on managing individual symptoms (emotional instability, agitation, sleep disturbances, psychotic phenomena etc)