Receiving Strokes even after medication.

Actually this medical information is for my friend Simran. So the condition is that she suffers strokes from last many years and even after taking proper medicines there is no improvement. Normally in a month she suffer a stroke but sometimes rarely the strokes comes 2 times within a gap of 10 days. The stroke remains for 5-7 mins and after when she woke up, her tongue has a cut which makes her hard to eat for some days. So can you please guide me about why is it happening like why the strokes are coming, possible reasons for it, and the treatments that she can undergo rather than surgery. Current medicine that she js taking is Levipill 500.. So please suggest a natural treatment like eating habits which can cure or atleast lower the frequency of the attack and also a proper medications..After this I will also book a online or in person appointment.