Vidalista 40mg contains tadalafil which belongs to a group of drugs known as selective inhibitors of certain PDE5s. This drug is used to treat impotent men. If you take vidalista 40 on an empty stomach or on a low diet, you can take vidalista tablet with or without food. Take this medicine orally with water. Do not take this drug with alcohol and grapefruit juice as it reduces the effectiveness of the drug.