Its advisable to get your renal function checked before going on such meds in case you have pre-existing renal impairment which can be a cause of hypertension.
Every time the dose is increased a further check on the kidney function is needed to ensure its not adversely affecting their excretory capacity.
These drugs can also interact with other medications (like diuretics, anti-inflammatory pain killers) to have an ADDITIVE effect on impairing kidney function.
Drus of this type(s) are very useful ,but its important that theres no contra-indication to their use before starting them.As mentioned in my post above, certain inherited cardiac disorders, plus a tight aortic valve can make using these meds very dangerous indeed.
I am paranoid of my brain. It thinks all the time, even when I'm asleep. My thoughts assail me. Murderous lechers they are. Thought is the assassin of thought. Like a man stabbing himself with one hand while the other hand tries to stop the blade. Like an explosion that destroys the detonator. I am paranoid of my brain. It makes me unsettled and ill at ease. Makes me chase my tail, freezes my eyes and shuts me down. Watches me. Eats my head. It destroys me.