This potent medication should be used once daily, one hour prior to engaging in sexual activity. To maximize the drug’s efficacy, you can also take it 30 to 4 hours before to sexual activity. If your doctor determines that you need to adjust your dosage, the medication’s strength may need to be adjusted as well. Patients over 65 are often administered a lower dosage of the medication once daily, one hour before to having sex. Your doctor may advise you to take bigfun 100 or a less potent form of this drug, depending on your health. The medication can also be given between thirty and four hours prior to sexual activity.