Men who have erectile dysfunction can be treated with vidalista 20. Tadalafil is a component in this medication. The medication is used to boost the pancreas' blood flow, which in turn causes the pelvic floor muscles to relax. This medication is not recommended for use by women or minors and is only for men above the age of 18. You should only take one dose of this medication every day. This medication takes 36 hours to take effect. This medication takes about 30 minutes to take effect.