Viagra, or sildenafil, primarily works by inhibiting phosphodiesterase-5 (PDE5). This enzyme usually breaks down cyclic guanosine monophosphate (cGMP), a crucial molecule for achieving and maintaining an erection. By blocking PDE5, Viagra increases cGMP levels, allowing blood vessels in the penis to relax and dilate. This increased blood flow leads to improved erectile function.
Factors Affecting Viagra’s Efficacy
Several factors influence how well Viagra works. Your overall health plays a significant role; pre-existing conditions like heart disease or diabetes can affect its effectiveness. Dosage is another critical aspect; your doctor will determine the appropriate dose based on your individual needs and health status. Alcohol and certain medications can interact with Viagra, potentially reducing its efficacy or causing adverse effects. It’s vital to discuss all medications and supplements you are taking with your doctor before starting Viagra.
Common Side Effects and Precautions
While generally well-tolerated, Viagra can cause side effects, including headache, flushing, nasal congestion, and visual disturbances. More serious, though rare, side effects include sudden vision loss or hearing loss. Individuals with heart conditions, low blood pressure, or a history of stroke should exercise caution and consult their physician before using Viagra. It’s crucial to follow your doctor’s instructions meticulously for safe and effective use.
