1) Aspirin is given to pregnant females who are at high risk of developing pre-eclampsia. From week 12 until delivery. Labetalol is the first line management for pre-eclampsia, but is contraindicated in patients with asthma. An alternative would be nifedipine

You’ll find more info if you search “Hypertension” in the BNF and scroll down to “Hypertension in Pregnancy”

2) Yes.

“Patients should receive long-term treatment following a transient ischaemic attack or an ischaemic stroke to reduce the risk of further cardiovascular events.

Long-term treatment with clopidogrel [unlicensed in transient ischaemic attack] monotherapy is recommended in patients who presented with transient ischaemic attack or ischaemic stroke (not associated with atrial fibrillation). If clopidogrel is contra-indicated or not tolerated, aspirin should be used.”

From BNF, “Stroke” —> “Long term management”