Viagra is a medication primarily used to treat erectile dysfunction (ED) in men. Its active ingredient, sildenafil citrate, belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. Viagra works by enhancing blood flow to the penis during sexual stimulation, facilitating the attainment and maintenance of an erection.

Upon ingestion, Viagra inhibits the action of PDE5, an enzyme responsible for breaking down cyclic guanosine monophosphate (cGMP). cGMP is a chemical messenger that promotes relaxation of the smooth muscles in the penile arteries, allowing increased blood flow into the erectile tissue. This heightened blood circulation results in an improved ability to achieve and sustain an erection when sexually aroused.

Viagra is typically taken orally, about 30 minutes to an hour before engaging in sexual activity. The onset of its effects may vary among individuals, and its efficacy is contingent upon sexual arousal.

It is important to note that Viagra does not serve as an aphrodisiac and requires sexual stimulation to induce its effects. Additionally, the duration of its effectiveness lasts for a few hours, after which the drug is metabolized and eliminated from the body.

While Viagra is generally well-tolerated, individuals considering its use should consult with a healthcare professional, especially if they have underlying health conditions or are taking medications that may interact with sildenafil. It is crucial to adhere to prescribed dosages and guidelines to ensure the safe and effective use of Viagra for the treatment of erectile dysfunction.