Sildenafil citrate works by inhibiting phosphodiesterase type 5 (PDE5), a specific enzyme found in the penis. This enzyme breaks down cyclic guanosine monophosphate (cGMP), a crucial molecule for achieving and maintaining an erection.
- Increased cGMP levels: By blocking PDE5, sildenafil allows cGMP levels to rise significantly. Relaxed smooth muscle: Elevated cGMP causes relaxation of smooth muscles in the blood vessels of the penis. Increased blood flow: This relaxation leads to increased blood flow into the corpora cavernosa, the spongy tissues within the penis. Erection: The increased blood flow creates the engorgement necessary for an erection.
This process is triggered by sexual stimulation. Sildenafil doesn’t directly cause an erection; it enhances the body’s natural response to sexual stimulation.
Here’s a simplified step-by-step explanation:
Sexual stimulation activates nitric oxide release. Nitric oxide stimulates cGMP production. Sildenafil prevents cGMP breakdown. Increased cGMP relaxes penile muscles. Blood flow increases, leading to an erection.
It’s important to note that individual responses to sildenafil can vary, and factors like age, overall health, and other medications may influence its effects. Always consult a healthcare professional before using sildenafil or any other medication.
