Welcome to HCM,
With history you have given your mother is having Hypertension
and a complication in the form of stroke that is Left hemiparesis
,that means she had a (TIA or RIND) Transient Ischemic attack
or Reversible Ischemic neurological deficit.
It is good that she has recovered and please ask her to take medicines regularly.
I am happy that you want to know role of medicines.
Angizar for Blood Pressure, Plagerine is anti platelet(Bold thiner),Tonact is for cholesterol
and others are vitamins.
You need to check periodically to adjust doses and in such diseases therapy is life long.