hi, i want to ask u that u have any physical illness like blood pressure, diabetes, if present since long than u have to correct first, because it is also one cause. and along with u start tab. tetrafol plus once a day for 1 week then twice a day for next 2 month, u will see effect after 1 month regular treatment. if u don t have any physical illness then i will suggest to start tab. tadalafill(20 mg) once before physical relation. only once or twice use treat your problem.