Need help on health and medical issues with a long-term Nitric Oxide donor

Write 2 pages about
long-term Nitric Oxide donor treatment: what are levels in blood and tissue
Does these level decrease by time?
what is the tolerance?
what is the long term tolerance? 
include at least 3 studies 
please don’t write about nitric oxide donor in general. I already wrote about it.
my original essay is 15 pages. I only need these 2 pages with these informations only to include it in the original essay.
I’m not gonna pay for incomplete or late work
thank you