Viagra, or sildenafil, primarily treats erectile dysfunction (ED) by increasing blood flow to the penis. This allows for firmer, longer-lasting erections sufficient for sexual intercourse. The medication works by inhibiting an enzyme called phosphodiesterase-5 (PDE5), which is responsible for breaking down cyclic GMP, a substance crucial for achieving and maintaining an erection.
How does it work in practice? When sexually stimulated, the body releases nitric oxide, triggering a chain reaction that leads to increased cyclic GMP levels. PDE5 normally counteracts this, but Viagra’s action prevents this breakdown, thus sustaining elevated cyclic GMP and improving erectile function. This effect is specifically triggered by sexual stimulation; Viagra doesn’t cause erections spontaneously.
Important considerations: While generally safe, Viagra isn’t suitable for everyone. Men with certain heart conditions, low blood pressure, or those taking specific medications should consult their doctor before use. Side effects, though usually mild, can include headaches, flushing, and nasal congestion. Always follow your doctor’s instructions and dosage recommendations. Discuss any potential interactions with other medications you are currently taking.
Remember: Viagra is a prescription medication. Obtain it only from a licensed healthcare professional. Self-medicating can be dangerous. A doctor can assess your suitability for Viagra and help you manage any potential side effects. They will also help determine if other underlying medical conditions contribute to your ED.
