Tadalafil 2.5mg Tablets have two major uses. The most popular is to treat premature ejaculation in men. In other words,premature ejaculation is also the inability to produce a satisfactory penile erection. It improves blood flow to the genitals, assisting males in obtaining an erection. It is also used to treat benign prostate hyperplasia (BPH). Tadalafil 10mg tablets are for men who are sad about their erection problems and have been facing a hard time satisfying their partners. Tadalafil 2.5mg Tablets may cause side effects such as headache, back pain, muscle aches, pain in the arms and legs, and indigestion.