vidalista is a brand name of tadalafil. It is prescribed to relax and improve blood flow to certain parts of the body. It’s most common use is in improving sexual performance in males. It is also prescribed in enlarged prostate. tadalafil is a phosphodiesterase type 5 inhibitor. Its pde5 inhibiting action releases more of cgmp in the corpus cavernosum of a . An increased level of cgmp relaxes the smooth muscles and improves blood flow.