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Viagra (sildenafil) is a medication originally developed for cardiovascular research and later found to be effective in treating erectile dysfunction (ED). Its mechanism involves improving blood flow by inhibiting phosphodiesterase type 5 (PDE5), allowing blood vessels to relax and expand.

Erectile function is closely linked to circulatory health, and Viagra does not create sexual arousal on its own. Instead, it supports the natural physiological response to stimulation by enhancing blood flow to penile tissue. Because of this mechanism, sildenafil is also used in certain cases of pulmonary arterial hypertension.

Viagra’s effects typically begin within 30–60 minutes and last several hours. It is taken as needed, not daily, unless otherwise prescribed. The medication is generally well tolerated, but side effects may include headache, flushing, nasal congestion, indigestion, or visual changes.

Viagra should not be used with nitrate medications or certain cardiovascular drugs, as the combination can cause dangerous drops in blood pressure. This makes medical evaluation essential before use, especially for individuals with heart disease, hypertension, or diabetes.

Beyond erectile function, Viagra has increased awareness of the link between sexual health and overall vascular health. ED can be an early indicator of underlying cardiovascular issues, prompting further medical evaluation.

When prescribed appropriately, Viagra supports both functional health and quality of life through its circulatory effects.