Viagra is a medication used to treat erectile dysfunction (ED), a condition where a man has difficulty getting or maintaining an erection. The active ingredient in Viagra is sildenafil citrate. It belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors.

Here are some key points about Viagra:

  1. Mechanism of Action: Viagra works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which regulates blood flow in the penis. By inhibiting PDE5, Viagra promotes increased blood flow to the genital area, facilitating an erection.

  2. Usage: It is typically taken orally, about 30 minutes to an hour before sexual activity. The effects can last for about four to six hours.

  3. Prescription: Viagra is a prescription medication, and it should only be taken under the supervision of a healthcare professional. Your doctor will assess your overall health, any existing medical conditions, and potential interactions with other medications before prescribing Viagra.

  4. Side Effects: Common side effects may include headache, flushing, indigestion, and nasal congestion. Serious side effects are rare but can include vision changes, sudden hearing loss, and priapism (prolonged and painful erection). Seek medical attention if you experience any severe side effects.

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