Hello. I m sorry your uncle is ill. Without more detailed information about his condition, it is very difficult to offer you any meaningful advice. Unfortunately, many forms of dementia are irreversible and gradually progressive despite the best treatment. Some medications, such as donepezil, galantamine, rivastigmine and memanitine, can slow the progression of dementia, but none of these drugs cures the condition. Keeping your uncle s diabetes under control may also help to delay worsening of his condition, but dementia is usually incurable. In many cases, the best we can do is keep our loved ones as comfortable and safe as possible; this may require assistance from non-family members (live-in caregivers, for example). Your uncle s doctor, who is most familiar with his case, is better qualified to offer advice about the best treatment(s) for his condition. I suggest you contact the physician who is charged with his care. My best to you.