Men with erectile dysfunction can be treated with Fildena 150 mg Tablet. Men take sildenafil citrate, an ingredient in the medication, to improve blood flow to their penises. The recommended age range for men using this medication is over 18. Because of its three to four-hour duration of action, this medication should only be taken once daily. In order to enjoy sexual activity with your partner, you take this medication 45 minutes prior to engaging in sexual activity. This medication can be taken either before or after a meal. You can take this medication as directed by your physician.