In addition, Cenforce 100 dosage is used to treat erectile dysfunction and impotence in males. sildenafil, an ingredient in this medication, helps men achieve a strong erection during sexual activity. Take this medication an hour before sexual activity to ensure a fun and enjoyable time with your partner. This medication has a 3 to 6-hour half-life. You should take this medication with water; do not crush or chew the tablet. Do not take this medication often as it has additional side effects.