Tadalafil is the active component in Tadarise 2.5. In addition to sexual stimulation, this medication works by boosting blood flow to the penis, the male genital organ, which aids in achieving the desired erection. Follow your doctor's advice regarding the dosage and duration of this medication. Follow your doctor's instructions on the dosage and duration of this medication. Take it all in at once. Never shatter, eat, or crush it. Avoid using medications without a prescription at any costs. Take 2.5 mg of Tadarise before to 1 hour of sexual activity.