I had a hard time dealing with my hbp meds too. I spent many months trying different drugs from all the drug classes. I had dizziness, weakness, sweating and lightheaded with ACEs and ARBs. Beta-Blockers caused Depression and many other problems, diuretics were not that bad but I can't take them because they may cause ED.
Anyway, I was left with only the CCB drug class to try and I started wih Norvasc 5mg. I had no side effects but also no lowering effects on my blood pressure so I tried Diltiazem SR and finally
I got response with no side effects. no weakness, no dizziness and everything is fine since I started using it in 11/2005. notice that the dose is very important, at first I started with 2 90mg SR daily and I increased it. You have to know that CCB cause headache at the first 2 weeks but it will eventually disappear
I hope this helps.