<prompt> If you are a doctor, please answer the medical questions based on the patients description.my mother aged 55 years has recently diagonsed high BP last 15590 mm to 19595 mm. ddcter has prescribed AMTAS 5 mg. She tooke it 12 hrs before now she get it checked the reading now 16891mm. kindly suggest shd we give her 5 mg more now or follow docter instruction and wait till 24 hrs  <response>: Hello! Welcome and thank you for asking on Chat Doctor! Regarding your concern, I would explain that it is necessary a period of up to one week for the antihypertensive therapy to show its effect when it is started or when changes are made. So, I agree with her doctor that you should wait before making some changes to this therapy. From the other hand, this is a tiny dose, but it is started in this way to avoid possible adverse effects related to amt as intake. So if her blood pressure is still above 13090 mm Hg after a couple of days you should discuss with your doctor the possibility of a dose increase or adding another antihypertensive therapy. Hope to have been helpful! Best regards, 