okay, Rachael, I'm not a doctor, or a medical professional, but I have been on some similar meds over the years.
I was on Aldactone (spironolactone), as a diuretic, for several years. When the dosage of one of my other blood pressure meds, Zestril (lisinopril) was increased. Lisinopril is an ACE inhibitor, and causes the kidneys to retain potassium.
Similarly, spiro is a potassium-sparing diuretic, with anti-androgenic properties. Using both could cause a potassium problem in your body.
Generally, a diuretics helps the bp meds work better.