Viagra, or sildenafil, enhances erections by increasing blood flow to the penis. It does this by inhibiting an enzyme called phosphodiesterase-5 (PDE5), allowing nitric oxide to relax the blood vessels. This increased blood flow makes it easier to achieve and maintain an erection in response to sexual stimulation.
What to Expect After Taking Viagra
The effects typically begin within 30-60 minutes, but can vary depending on individual factors and food consumption. A fatty meal can delay onset. The erection itself is not spontaneous; sexual stimulation is still required. The duration of effectiveness is generally four to five hours. Side effects, although uncommon, can include headache, flushing, nasal congestion, and indigestion. These usually are mild and transient. Always follow your doctor’s instructions regarding dosage and frequency.
Important Considerations
Viagra isn’t for everyone. Men with heart conditions, low blood pressure, or certain eye problems should discuss its use with their physician. Combining Viagra with nitrates can be dangerous. Inform your doctor about all medications you’re taking. A consultation is key to determining if Viagra is the right treatment option for you.
