Men with sexual disorders such as impotence and erectile dysfunction are treated with vidalista 40. This medication takes four to six hours to take effect. Tadalafil, a component in this medication, aids in giving men a powerful erection during sexual activity. Women and children should not use this medication. You can take this medication any way—before or after food. This medication can be taken with water. Never break or chew this medication. Take this medication half an hour prior to sexual activity so that you can enjoy quality time with your companion.