Filitra 40 mg has a relatively rapid onset of action, with effects typically starting within 30 minutes to 1 hour after ingestion. The medication can remain effective in the body for up to 4 to 6 hours, during which time a person may find it easier to achieve and sustain erections. Filitra 40 mg tablets are taken orally with water. It's generally recommended to take the tablet about 30 minutes to 1 hour before anticipated sexual activity.