Thank you for contacting HCM. Novohydrazide is nothing but hydrochorthiazide (generic name). This is one of the first medications doctors start for high blood pressure. there is no association to food or water. we advise taking BP medication in the morning. as your blood pressure went down for some time and gone back up. please see what is causing it go high. life style modifications decrease BP by 10-20 mm hg. regular exercise, and avoiding salt containing food decreases BP by 10 -20 mm hg. please do these if you are not already follwoing. restrict your salt intake to less than 2 gm. eat balanced diet and avoid smoking. any life stressor should be addressed as well for better BP control. we hope you have a diet controlled hypertension.