Viagra, or sildenafil, primarily works by inhibiting phosphodiesterase-5 (PDE5), an enzyme that breaks down cyclic guanosine monophosphate (cGMP). Increased cGMP levels relax blood vessels, leading to improved blood flow. This mechanism explains its effectiveness in treating erectile dysfunction.
However, PDE5 isn’t solely found in the penis. It’s also present in the retina, impacting blood flow there as well. This explains why some men experience vision side effects. Specifically, inhibition of PDE5 can cause vasodilation in the retinal blood vessels, leading to temporary visual disturbances.
Common visual side effects include changes in color vision (seeing a bluish tinge), blurred vision, and increased light sensitivity. These effects are generally mild and transient, typically resolving within a few hours after Viagra use. Severe vision problems are rare but potentially serious.
Important Note: Sudden vision loss is a serious side effect requiring immediate medical attention. If you experience sudden vision loss after taking Viagra, contact your doctor or seek emergency medical care immediately.
Disclaimer: This information is for educational purposes only and does not constitute medical advice. Consult your physician before taking Viagra or any medication.
