tadalafil tadarise 40 mg is an oral medication that works as an erection aid. It belongs to a group of medicines called phosphodiesterase (PDE) inhibitors, which increase blood flow to the penis. This increases the likelihood of a man having an erection and achieving a strong, hard erection that lasts. The medicine is used to treat erectile dysfunction and symptoms of benign prostatic hyperplasia (BPH). It helps men who suffer from these conditions achieve a stronger, firmer erection.