Sildisoft tablets contain sildenafil citrate, which is the same active ingredient found in Viagra. Sildenafil citrate is a medication used to treat erectile dysfunction (ED) in men. It belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors. Sildisoft tablets are primarily used to treat erectile dysfunction, a common condition characterized by the inability to achieve or maintain an erection sufficient for sexual activity. Sildenafil citrate works by increasing blood flow to the penis during sexual stimulation, which helps men achieve and sustain an erection.