You should take the drug between half an hour and an hour before having sex, so that the effect of the drug will begin to manifest itself as soon as you have sex. Try not to take the drug right next to the sexual activity as it takes some time for it to take effect, so it is very critical to take it some time before performing the sexual act. If you want to take another pill, you can do it about 48 hours after you take the pill first - it is very important that you know this issue so that you can take the medicine at the right frequency and according to the recommendations.