High bp for past 2 days. I have query!

Hi doctors. I have query regarding my mother's health. She is 56 year old. Before 5-6 months she had low bp occassionally. And for two months. She was suffering from high bp. Once or twice in a week. But since yesterday morning She is feeling weak and also vomit on empty stomach in early morning yesterday and also in night and in today early morning she vomit wattery. No desire for eating. No medication I have taken Yesterday three reading were 175/90 167/87 176/90 after intervals of 5 minutes. And today morning empty stock It is 157/85 and 159/84 in early morning. What medicine should I take sothat she can feel better. Or increase appetite . No other issue no headache. Only vomit feeling and weakness and loss of appetite. Pls suggest what to do. Which medicine combination should take. Thank you