Viagra, or sildenafil citrate, treats erectile dysfunction (ED) by increasing blood flow to the penis. This allows for firmer erections suitable for sexual intercourse. The medication works by inhibiting an enzyme called phosphodiesterase-5 (PDE5), leading to increased levels of cyclic GMP, a molecule that relaxes smooth muscles in the penis. This process, in turn, facilitates vasodilation.
How Viagra Works
Viagra typically takes effect within 30-60 minutes, and its effects can last up to four hours. The recommended starting dose is 50 mg, taken as needed, about one hour before sexual activity. Your doctor will adjust the dosage based on your individual needs and response to the medication, with options ranging from 25mg to 100mg. Remember, it’s crucial to follow your doctor’s instructions carefully.
Potential Side Effects and Precautions
Common side effects include headache, flushing, nasal congestion, and visual disturbances. Serious side effects are rare but include sudden vision loss, hearing loss, and prolonged erections (priapism). Viagra interacts with certain medications, particularly nitrates, so inform your doctor about all medications you’re taking. Men with heart conditions or other underlying health issues should consult their physician before using Viagra to ensure its safe usage.
