No medication should be taken without a doctor's prescription. Similar to this, one should speak with a doctor before taking Zudena pills to prevent ED in order to acquire all the information they need, including when and how to take the medication, as well as the interval between doses. Half an hour prior to sexual activity is the ideal time to take Zudena pills in order to achieve the required erection during intercourse. Since Zudena pills are taken orally, they should be completely filtered with water. An erection that lasts four to six hours can be achieved by taking Zudena pills after getting aroused.