Tadalafil is a male erecticle dysfunction or impotence medication that works to relax the blood vessels within the penis and support blood flow. The medicine belongs to a gaggle of drugs called Phosphodiesterase type 5 inhibitors. Combined with sexual stimulation, these medications help men to realize and maintain erectile function over time. Tadalafil is available in two formats. One option may be a “daily” pill, which provides the individual the choice to always be ready for intercourse. The other option may be a 36-hour medication which may be taken half an hour before sexual intercourse. Because the daily medicine is taken a day it’s often given at lower dosages.