Viagra, or sildenafil, primarily works by inhibiting an enzyme called phosphodiesterase-5 (PDE5). This enzyme normally breaks down cyclic guanosine monophosphate (cGMP), a molecule crucial for blood vessel relaxation. By blocking PDE5, Viagra increases cGMP levels, leading to vasodilation, particularly in the penis, resulting in improved blood flow and facilitating erection.
However, this mechanism also affects other blood vessels. Common side effects stem from this broader vasodilation. These include headaches, flushing, nasal congestion, and visual disturbances, such as changes in color perception or blurred vision. Less frequent, but more serious, side effects can include heart attack, stroke, or sudden hearing loss. Individuals with pre-existing heart conditions or high blood pressure should consult their doctor before using Viagra.
The severity and frequency of side effects vary significantly between individuals. Factors such as dosage, age, and overall health play significant roles. Always follow your doctor’s prescribed dosage and instructions. Report any concerning side effects immediately. Consider discussing potential drug interactions with your physician before starting Viagra therapy, as some medications may interact negatively.
Remember, Viagra is a prescription medication. Self-medicating is dangerous and can have severe consequences. A consultation with a healthcare professional is paramount to ensuring safe and effective use. Your doctor can assess your health status and determine if Viagra is an appropriate treatment option for you and the appropriate dosage.
