Would YOU take a diuretic?

I take an ARB - Cozaar - for mild hypertension. But, I’m a tight control type of person and it tends to creep into the 130s and 140s at times, so I’d like it lower. My doc has suggested a diuretic - specifically, Hyzaar - one of the “combo” drugs, which always make me suspicious. But isn’t a diuretic a bit dangerous for diabetics? Esp. since dehydration is already a possible issue. And don’t you have to curb salt way back and supplement with potassium? I know some are “potassium-sparing” but this one isn’t. I’m just not smart on all of this yet.

Anyone out there who’s gotten a lot smarter on this than I am?