Vidalista 40 is a medication used to treat male impotence and erectile dysfunction. This medication should only be taken by men over the age of 18. This medication contains the chemical Tadalafil, which allows men to have a greater erection during intercourse. Vidalista 40 medication has an effect that lasts 4 to 6 hours, so do not use it too frequently. This medication can be used before or after meals. This drug should not be taken with fatty foods or cold drinks. Take this drug as directed by your doctor. Take this medication with water; however, do not break or chew it.