High blood pressure. Please help!

My mom 59 is having high blood pressure since the time we randomly checked 3 days back. She complains of dizziness every evening for the last 2 months approx so checked her bp 3 days back and it was 180/75. She is on telsite 40 mg tablet , consulted a doctor online who asked to administer the same telsite 40 mg twice daily. Today her blood pressure before taking the evening dose was 138/76. We are not sure of the correct dosing . Can telsite cause the blood pressure to drop too low.?? Should she take 40 mg twice or only once. She has high creatinine, high cholesterol, thyroid issues and diabetes too. The doctor I consulted online prescribed cinod 10 mg along with 40mg telmisartan twice daily. What should she take and what dosing. Please help