Fildena 100 purple pill is used to treat male erectile dysfunction. This medication is a highly successful treatment for impotence. An ingredient in this medication called sildenafil helps men achieve a strong erection during sexual activity. This medication is only for men who are at least eighteen years old. This medication should be taken half an hour before sexual activity. Do not take this medication frequently as its effects last for 6 hours. Consume water along with this medication. As directed by your doctor, take this medication.