Tadalafil works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which is responsible for restricting blood flow to the penis. By blocking this enzyme, Vidalista promotes the relaxation of blood vessels, particularly in the penile area, allowing for better circulation and stronger, longer-lasting erections. The medication typically takes effect within 30 to 60 minutes of ingestion, and its effects can last up to 36 hours, offering a wide window of opportunity for spontaneous sexual activity.