first regarding your BP, we need to find out any secondary cause for hypertension
like renal, endocrine, renal artery stenosis
cause. you are required to do some basic investigations like renal function tests, urine examination, renal doppler and special blood investigations in consultation with your doctor to look for cause of high BP
. potato wafers may not affect RFT much, but beware of high salt containaing food .They will increase your BP.