Tadalafil, the active component of Vidalista 20, improves blood flow to the penis by relaxing the muscles in the penile blood vessels, hence treating erectile dysfunction. Patients should always take this medication 30-60 minutes before having intercourse. It is not recommended for use by females of any age or by children or teenagers younger than 18. It should be stored at room temperature in a clean, dry, and dark location. Verify that the tablets are intact and in good shape before buying. Women might be more susceptible to these side effects because men and women have different metabolisms and hormonal balances.