Now that we have a basic understanding of what Sildisoft Tablets are, let's take a closer look at how they work. These tablets belong to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. They are primarily prescribed to treat erectile dysfunction (ED) by improving blood flow to the penile region. But here's where it gets interesting – the mechanism by which they do this ties directly into Nitric Oxide production.