A person with erectile dysfunction will find it difficult to achieve or maintain enough erection to have regular sex. This can interfere not only with sexual activity but also with the quality of life of the person. Vidalista 40 mg is a drug that men can use to enjoy a strong erection and eliminate their impotence. This medicine should be taken only once a day as advised by your doctor, otherwise, it may cause side effects on the body. The effect of this drug varies from person to person for up to 30 minutes.