Guys with impotence take Fildena Professional 100. sildenafil, one of the ingredients in this medication, facilitates increased blood flow to the penile tissues of men. Take this medicine 30 minutes before engaging in sexual activity to maximize the time you spend with your partner. Meals can be taken with or without this medication. The effects of this medication take 24 hours to manifest. Follow your doctor's instructions when taking this medication. This medication is only for use by men who are at least 18 years old.