The mechanism of action of Vidalista 20 mg is to increase penile blood flow. This helps men maintain and achieve an erection. It belongs to the group of medications known as phosphodiesterase type 5 inhibitors. Vidalista 20 mg should be taken 30 to 60 minutes before having sex with your partner to maximize its effects. The Vidalista tablet is swallowed, either with or without water. Make sure you don’t use any drugs or alcohol before taking Vidalista. Furthermore, it is not advised to take more than one dose in 24 hours.