Hellos sir. About you question, you must take medicine only if you are having problem with sustaining erections for sufficient time. Do not take the tablet in absence of problem. Slight apprehension and anxiety during initial stages of sex life of after marriage is normal and important part of a relationship. It may happen that you may not be able to complete intercourse on fist few occasions s after marriage, it is again normal. I would suggest you not to take medjust to be sure about performing well. Experience every aspect of a relationship and sex. Believe in yourself, stay away from unhealthy and sexual practices, maintain healthy lifestyle.