Any treatment to reduce symptoms of Azheimer + NPH ?

Hi,

My dad is 77yo and ALZ dementia was suspected some 5yrs back but not diagnosed definitely. 3yrs back he started showing some symptoms that were mis-diagnosed as Parkinsons (feet-dragging, shuffle-walking, body tilted forward) as well. Later with MRI (contrast) and CT-scan (contrast) Neuro-Surgeons (confirmed by 2 very senior NS from reputed hospitals) determined his condition to be NPH (Normal Pressure Hydrocephalus), with possible comorbidies including ALZ dementia. His condition and symtoms have been worsening, and in last 3-4 months it has picked up tremendous speed of detoriation.

His current symptoms are:
1. Excessive and continuous talking, very loudy,
2. Getting extremely agitated and taking very long time (sometimes an entire-day) to cool down
3. Punching, pinching, kicking his care-givers but having no recollection of having done it.
4. Significant incontinence -- especially stools. He thinks that he needs to urinate, but passes stool as well when seated on chair, on bed or standing. Somedays are terrible, as he soils himself, bed and everything 3-4 times a day.
5. Not following instructions - he seems to be able to hear us, but unable to follow instructions. He'd sit for an hour on bed, having wetted his clothes, while saying that he is standing in the bathroom. If he sits down, it is very difficult to get him to stand up and vice-versa.
6. His appetite is okayish (not great) and needs to be fed. He stopped eating by himself almost a year back.
7. Somedays he just doesn't go to sleep and will stay up all night and keep talking, shouting agitatedly, loudly until almost dawn, in spite of having done the entire day. Some days however he sleeps for 3-4 hours at night, but keeps muttering something in sleep.
8. Refuses to take allopathic medication, refuses to allow his nails to be cut, or his beard/hair to be groomed -- violently pushing the care-give away.

Wanted to see if there is any medication that could improve his situation somewhat. Especially the agitation, lack-of-sleep and reduce the incontinence, is able to rest.

Apart from this, he has been a long term patient of hypertension, has had one angioplasty in left coronary artery (after a brief spell of Angina pain -- 6-7 years back), for both of which he was on lifelong medication post event and also had Cronhs Disease (under control with medication). Of course, now a days, most days he just throws away the medicines.

Guidance, advise on how to relieve some symptoms if possible, deeply appreciated.

cheers,
f74