When it comes to preventing erectile dysfunction and premature ejaculation, sildenafil and dapoxetine are two of the most frequently used medicines that can help. When using sildenafil, the rate of usage will be around 50 mg, at least one hour before sexual intercourse. It has a positive effect on the blood that comes to the penis, which eventually makes it more functional and keeps the erection longer. For people who are prescribed dapoxetine, the proper dosage is usually 30 mg; this drug is taken for 1-3 hours before having sex. It is a remedy to early ejaculation that delays the time that it takes for an individual to cum. As a reminder, it is always recommended to talk to your doctor to decide on the appropriate dose that you would particularly need.