Suhagra 25 mg contains sildenafil citrate, and it’s effective only when sexually stimulated because of how the drug works in the body. Here’s a detailed explanation: Mechanism of Action Nitric Oxide (NO) release: ****** arousal triggers nerve signals in the penis, which release nitric oxide in the erectile tissue. cGMP production: Nitric oxide increases levels of cyclic GMP (cGMP) in the smooth muscle of the penis. This causes the blood vessels to relax and the penis to fill with blood. Sildenafil’s role: Suhagra inhibits phosphodiesterase type 5 (PDE5), an enzyme that breaks down cGMP. By blocking PDE5, sildenafil prolongs the action of cGMP, making it easier to achieve and maintain an Suhagra 25 mg . Why ****** stimulation is necessary Without ****** arousal, nitric oxide is not released, so cGMP levels remain low. Sildenafil can’t create an erection on its own; it only enhances the natural erectile response to ****** stimulation. This is why taking Suhagra while inactive or without arousal won’t produce an erection. Summary Suhagra 25 mg is effective only when sexually stimulated because it works by enhancing the body’s natural response (cGMP increase) to arousal. It does not act as a ****** stimulant or automatically induce erections.