Generic Viagra, containing the active ingredient sildenafil, enhances erections by increasing blood flow to the penis. It achieves this by inhibiting phosphodiesterase-5 (PDE5), an enzyme that breaks down cGMP, a chemical responsible for relaxing the blood vessel muscles.
Understanding the Mechanism
With increased cGMP levels, blood vessels in the penis dilate, allowing more blood to enter and resulting in a firmer erection. This process requires sexual stimulation; Viagra doesn’t create erections on its own. The effects typically last for four to five hours. Dosage depends on individual needs and should always be discussed with a doctor.
Important Considerations
Sildenafil interacts with certain medications, notably nitrates. Combining them can cause a dangerous drop in blood pressure. Discuss all current medications with your physician before starting Viagra. Side effects, though usually mild, can include headache, flushing, and indigestion. Seek immediate medical attention if you experience chest pain or vision changes.
