Generally, doctors do not advise taking sildenafil, tadalafil, or vardenafil along with dapoxetine. However, there are a few medicines used for both ED and PE, which contain either sildenafil, vardenafil, or avanafil along with dapoxetine. If you suffer from both erectile dysfunction (ED) and premature ejaculation (PE), you can try taking sildenafil citrate and dapoxetine, such as Super P Force. But before that, discuss with your doctor.