Viagra

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Viagra, scientifically known as Sildenafil Citrate, is a medication that first appeared in 1998. It is primarily used to treat erectile dysfunction (ED) and pulmonary arterial hypertension. Viagra works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which relaxes the muscles in the walls of blood vessels, allowing for increased blood flow to the penis during sexual stimulation, thereby enhancing the ability to achieve and maintain an erection.

It must be taken orally, typically 30 minutes to an hour before planned sexual activity, and its effects typically last for 4-6 hours.

It is crucial to follow the recommended dosage and usage guidelines provided by a healthcare professional to ensure safety and efficacy.