Eriacta is known to work differently for different people. So the time duration in which it starts to work may differ from person to person.
In most cases though, it is best when taken 15 to 30 minutes prior to having sex.
Eriacta will be in the body for up to 4 hours.
Eriacta is only required if you wish to indulge in sexual intercourse. It is not to be taken regularly. So, there is no chance of a missed dosage problem.
But if you forgot to take the medication before having sexual intercourse, then you can take it as soon as you remember it. You must wait for the right amount of time until Eriacta is absorbed in your body.