Tadalista 40 is a medication used to treat sexual difficulties in males. Taking this medication allows men to keep a sexual erection with their spouse for an extended period of time. This medication contains tadalafil as a generic ingredient. Before taking Tadalista 40, consult with your doctor. This medication is administered 30 minutes prior to sexual intercourse. The effects of this medication last 36 hours. This medication is given in various dosages.