Hi, Am 27 And Got Married Recently. I Had Problem

Hi, am 27 and got married recently. I had problem in maintaining erection for long time. I have consulted a doctor on that and he has prescribed to take stalyon in the morning, half of getgo 20 in afternoon after lunch and jakjoy after dinner. I have a doubt if jakjoy has to be taken immediately after dinner or should there be any time gap after dinner.