Viagra, or sildenafil, primarily treats erectile dysfunction (ED), a condition affecting a man’s ability to achieve or maintain an erection firm enough for satisfactory sexual intercourse. It works by increasing blood flow to the penis.
How Viagra Works
Viagra inhibits an enzyme called phosphodiesterase-5 (PDE5). This allows increased levels of cGMP, a chemical that relaxes blood vessel muscles, leading to improved blood flow. Sexual stimulation is still necessary to trigger the erection; Viagra simply helps the body respond appropriately.
Beyond Erectile Dysfunction
While ED is the most common use, Viagra also finds application in treating pulmonary arterial hypertension (PAH), a condition causing high blood pressure in the arteries leading to the lungs. In this context, it improves blood flow to the lungs, easing breathing difficulties.
Important Considerations
Consult your doctor before using Viagra. It’s crucial to discuss your medical history, including any existing heart conditions, high blood pressure, or liver/kidney problems. Viagra can interact negatively with certain medications, such as nitrates. Side effects, though generally mild, can include headache, flushing, nasal congestion, and visual disturbances. Always follow your doctor’s dosage recommendations.
Dosage and Administration
The prescribed dose will vary based on individual needs and medical history. It’s typically taken orally, usually about an hour before anticipated sexual activity. The drug’s effects last for several hours.
