Sildenafil citrate works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which leads to increased blood flow to the penis. This increased blood flow helps to relax the smooth muscles in the penis, allowing for an erection to occur when sexual stimulation is present.

Here are the key uses of sildenafil citrate:

Erectile Dysfunction (ED): Sildenafil citrate is widely prescribed to treat erectile dysfunction. It helps men with ED achieve and maintain an erection that is suitable for sexual intercourse. It is important to note that sildenafil citrate does not cure the underlying causes of erectile dysfunction but provides temporary relief from the symptoms.