Viagra, or sildenafil, is a medication primarily used to treat erectile dysfunction (ED) in men. It works by increasing blood flow to the penis, facilitating an erection. This occurs through inhibition of phosphodiesterase-5 (PDE5), an enzyme that breaks down cyclic GMP, a crucial molecule involved in achieving and maintaining an erection.
Specifically, Viagra blocks PDE5, allowing cyclic GMP levels to rise. Higher cyclic GMP levels relax the smooth muscles in the penis’ blood vessels, increasing blood flow. This increased blood flow, coupled with sexual stimulation, results in an erection.
Beyond ED, Viagra also treats pulmonary arterial hypertension (PAH), a condition causing high blood pressure in the arteries leading to the lungs. By relaxing blood vessels, it lowers blood pressure in these arteries, improving blood flow and reducing strain on the heart.
Important Note: Viagra isn’t a performance enhancer; it requires sexual stimulation to work. Always consult a doctor before taking Viagra, as it has potential side effects and drug interactions. Your doctor can determine if it’s safe and appropriate for you, considering your medical history and current medications.
Common side effects may include headache, flushing, nasal congestion, and visual disturbances. Serious side effects are rare but require immediate medical attention.
