Salt Tablets

Hi Everyone
Given that my daughters normal blood pressure has always been on the lower end of the scale, i have been giving her some OTC salt tablets (600mg Sodium Chloride) 4-5 times a day to counteract the Trandolapril and the higher dose of Verapamil over the week surrounding chemo treatments.
In reading an article from the library (Thank you Stephen for giving me access to the library) titled;
Losartan versus Enalapril on celebral edema, it states that lab rats were given a high salt intake to accelerate the appearance of celebral edema.
It concludes that chronic treatment with the AT receptor blocker Losartan prevents the development of celebral edema, and causes manifest cerebral edema to disappear in salt loaded rats?
I am totally new to all of this, and i struggle to understand the medical and scientific interpretations, so i guess my question is;
By giving my daughter a salt supplement to counteract her angiotensin medications, could i in fact be escalating the risk of additional edema.
Any feedback greatly appreciated.
Regards
Martin