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Viagra is a prescription medication used to treat erectile dysfunction (ED), a condition where a man has difficulty achieving or maintaining an erection sufficient for satisfactory sexual performance. The active ingredient in Viagra is **sildenafil citrate**.
Key Features:
- Mechanism of Action: Viagra works by inhibiting an enzyme called phosphodiesterase type 5 (PDE5), which leads to the relaxation of blood vessels in the penis and increased blood flow. This helps achieve and sustain an erection when sexually stimulated.- Form and Dosage: Viagra is available in tablet form and typically comes in strengths of 25 mg, 50 mg, and 100 mg. It should be taken orally with water, usually about 30 to 60 minutes before sexual activity. The effects can last up to 4-5 hours, but this can vary among individuals.
- Usage Instructions: It is advised to take Viagra on an as-needed basis, rather than as a daily medication. It should not be taken more than once a day.
- Common Side Effects: Some common side effects include headaches, flushing, nasal congestion, indigestion, and dizziness. These side effects are generally mild and temporary.
- Serious Side Effects: Rare but serious side effects may include prolonged erections (priapism), sudden vision loss, or hearing loss. If any of these occur, immediate medical attention is necessary.
- Precautions: Viagra should be used with caution in people with certain health conditions such as severe heart or liver problems. It is contraindicated with nitrate medications, as this combination can cause a dangerous drop in blood pressure.
- Drug Interactions: Viagra can interact with various medications, including some that are used for treating high blood pressure, HIV/AIDS, or fungal infections. Inform your healthcare provider of all medications and supplements you are taking.
Note: Always follow your healthcare provider's guidance regarding the use of Viagra to ensure it is appropriate for your condition and to minimize potential risks.
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