Tadalista 5 mg contains tadalafil 5 mg, a PDE-5 inhibitor used to treat erectile dysfunction (ED). How it helps ED When you become sexually aroused, your body releases nitric oxide, which increases a chemical called cGMP. This relaxes the smooth muscle and increases blood flow into the penis, helping produce and maintain an erection. Tadalafil blocks PDE-5, the enzyme that breaks down cGMP. This allows the blood-flow signal to last longer, making it easier to get and maintain an erection when sexual stimulation is present. It Tadalista 5 mg not cause an automatic erection or increase sexual desire. Why 5 mg is commonly used 5 mg once daily is an approved daily regimen for ED. Taking it every day provides a steady level of tadalafil, so you don't have to time a tablet specifically around sexual activity. For comparison, tadalafil can also be used as needed, where 5–20 mg may be used depending on effectiveness and tolerability. Important: Tadalafil must not be taken with nitrate medicines such as nitroglycerin or isosorbide because this can cause a dangerous drop in blood pressure. If you want, I can also explain how long Tadalista 5 mg takes to start working and when you should expect improvement.