Fildena 100 mg are to be taken in the mouth followed by successive swallowing. Remember when in your mouth please avoid chewing on the p*lls or breaking or crushing them with your teeth. For intake, the best possible option to avoid any contradictions is water only. On your things to avoid list, you can include grapefruit juice and any other beverage that contains alcohol. Also, avoid any fluid substance that may have dissolved addictive substances or drugs in them.As given above the use is for making your p*nis harder and erect.