Vidalista Pills (Tadalafil) primary function is to increase blood flow to the penis by inhibiting the enzyme PDE5. This assists men with ED in achieving and maintaining an erection during sexual stimulation. It's important to note that sexual arousal is still required for the medication to work properly. This medication should not be combined with alcoholic beverages or fatty foods. Take this medication exactly as prescribed by your doctor. This medication has a half-life of 4 to 6 hours.