Tadagra 20 mg contains the active ingredient Tadalafil, which is a phosphodiesterase type 5 (PDE5) inhibitor primarily used to treat erectile dysfunction (ED). Tadalafil does not directly affect sexual desire or arousal; its primary mechanism of action is to improve erectile function by increasing blood flow to the ***** when a man is sexually stimulated.

Here's how Tadagra 20 mg affects sexual desire and arousal:

 Tadalafil works by inhibiting the enzyme PDE5, which is responsible for the breakdown of cyclic guanosine monophosphate (cGMP) in the smooth muscle cells lining the blood vessels in the *****. When sexual stimulation occurs, nitric oxide is released into the erectile tissue of the *****, which activates the enzyme guanylate cyclase. This enzyme increases levels of cGMP, leading to relaxation of the smooth muscles and increased blood flow into the *****. This increased blood flow results in an erection.