At present, no drug has been proven to be effective in the treatment o
f acute ischaemic stroke or intraparenchymatous haemorrhage. However,
investigations of neuroprotective, antiplatelet, anticoagulation and t
hrombolytic therapies for acute ischaemic stroke are ongoing. Recent s
tudies have provided evidence of the usefulness of therapies for the p
rimary and secondary prevention of ischaemic stroke. In the primary pr
evention of ischaemic stroke, warfarin is indicated in all patients wi
th atrial fibrillation and at least 1 risk factor for stroke, and for
patients greater than 65 years old with lone atrial fibrillation. Warf
arin is also indicated for the secondary prevention of ischaemic strok
e in patients with atrial fibrillation. Aspirin (acetylsalicylic acid)
and ticlopidine are indicated for the secondary prevention of ischaem
ic stroke in patients without atrial fibrillation. Carotid endarterect
omy is beneficial in patients with high grade stenosis and transient i
schaemic attacks or nondisabling stroke. In patients with subarachnoid
haemorrhage, the prevention of rebleeding is based on surgical interv
ention; however, nimodipine is useful in preventing the incidence of d
elayed cerebral ischaemia.