Bp has been 170/100 for past 2 days. i take dyazide 37.5/25 once daily. got ha and face is hot and flushed. can i take another dose?

The maximum dose of Dyazide (hydrochlorothiazide & triamterene) is 50mg/75mg daily. However, blood pressure readings from a home cuff or at the store may be uncalibrated and inaccurate. Hypertensive urgency and emergency is due to uncontrolled high blood pressure causing symptoms of end organ damage, such as headache, visual changes, chest pain, and lower urine output, that require ER evaluation

Yes, you can take an extra dose for now then call your doctor for an urgent visit for rechecking blood pressure and med adjustment. Double the current dyazide dose, even daily, less likely bring down your BP goal of less than 130/80.