Tadarise 5 mg is a medication that contains tadalafil as its active ingredient. Tadalafil is a phosphodiesterase type 5 (PDE5) inhibitor commonly used to treat erectile dysfunction (ED). The mechanism of action for Tadarise 5 mg is similar to other medications containing tadalafil. Tadalafil inhibits the action of phosphodiesterase type 5 (PDE5), an enzyme found primarily in the smooth muscle of the corpus cavernosum in the penis.