My Brother Tim Who Has Downs Is 51 With Diagnosed

my brother tim who has downs is 51 with diagnosed dementia he lives with me and has for 19 years he was otherwise fit and on no medication except topical face cream today on a car ride he had a seizure his first ever an ambulance came and rush him to the er they did a cat scan to check for stroke and found two small hemorrhages in his frontal lob they have sent him to a bigger hospital with better equipment he did come too and fussed with the nurses but had been sedated what can they due for him