Vidalista Black 80 mg is useful in the treatment of edema. The tadalafil in this drug enhances the effect of a compound that is released into the body when stimulated. This results in increased blood flow to the penis, which helps maintain an erection. In most cases, medication is recommended 30 to 60 minutes before intercourse. Drug use before engaging in sexual activity will lead to the most effective results. It is advisable to take only one dose of this medicine 24 hours a day.