The main condition that Vidalista is prescribed to treat is ED, which is defined as the inability to achieve or maintain an erection strong enough for gratifying sexual performance. Tadalafil helps men achieve and sustain an erection by increasing blood flow to the penis during sexual stimulation. Vidalista dosage recommendations are to take one tablet orally with water, 30 to 60 minutes before sexual activity. Vidalista can be taken on an empty stomach or with food. Take it exactly as prescribed by your physician. It should only be taken once a day at most.