Viagra (sildenafil) is a medication primarily used to treat erectile dysfunction (ED) in men. It works by increasing blood flow to the penis.
Specifically, Viagra inhibits an enzyme called phosphodiesterase-5 (PDE5). This enzyme usually breaks down a chemical called cyclic GMP, which is crucial for achieving and maintaining an erection.
- By blocking PDE5, Viagra allows cyclic GMP levels to rise. Increased cyclic GMP leads to relaxation of the smooth muscles in the penis. This relaxation allows increased blood flow into the penis, resulting in an erection.
It’s important to note that Viagra only works when there’s sexual stimulation. It doesn’t cause erections on its own.
Common side effects include headache, flushing, nasal congestion, and visual disturbances. These are usually mild and temporary.
Always consult your doctor before starting Viagra. Discuss your medical history, including any existing conditions or medications you are taking. Follow your doctor’s instructions carefully regarding dosage and usage.
Viagra is a prescription medication, available only with a doctor’s prescription. Never take Viagra without consulting a healthcare professional.
