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What is Viagra?
Viagra, with the generic name sildenafil, is a prescription medication primarily used to treat erectile dysfunction (ED) in men. It belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. By increasing blood flow to the penis during sexual stimulation, Viagra helps achieve and maintain an erection sufficient for sexual activity. Additionally, sildenafil is utilized to treat pulmonary arterial hypertension (PAH), a condition characterized by high blood pressure in the lung vessels.
How Does Viagra Work?
Viagra works by blocking the PDE5 enzyme, which normally breaks down cyclic guanosine monophosphate (cGMP), a molecule that promotes smooth muscle relaxation and blood vessel dilation in the penis. Inhibiting PDE5 allows cGMP to accumulate, relaxing blood vessels and increasing blood flow to the erectile tissue during sexual arousal. Sexual stimulation is required for Viagra to be effective, as it does not initiate an erection on its own.
Common Uses of Viagra
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Treatment of erectile dysfunction (impotence)
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Management of pulmonary arterial hypertension (PAH)
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Occasionally used off-label for other vascular-related conditions (under doctor supervision)
Dosage and Administration
Viagra is available in oral tablets of 25 mg, 50 mg, and 100 mg. The typical starting dose for erectile dysfunction is 50 mg taken approximately one hour before sexual activity. Depending on effectiveness and tolerance, the dose may be adjusted from 25 mg to 100 mg. Viagra should not be taken more than once daily. It can be taken with or without food but may have delayed effect with high-fat meals.
Benefits of Viagra
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Proven effective treatment for erectile dysfunction
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Fast onset of action, generally within 30 to 60 minutes
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Improves ability to achieve and maintain erections during sexual activity
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Helps improve quality of life and sexual satisfaction
Potential Side Effects
Common side effects include headache, flushing, indigestion, nasal congestion, dizziness, and visual disturbances. Serious side effects are rare but may include sudden vision or hearing loss, chest pain, irregular heartbeat, or prolonged erections lasting more than 4 hours (priapism). Seek immediate medical care if severe side effects occur.
Safety Information and Precautions
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Do not use Viagra if you are taking nitrate medications or nitric oxide donors due to risk of severe hypotension
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Inform your doctor about any heart conditions, low blood pressure, or allergies
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Avoid excessive alcohol consumption as it can diminish effectiveness and increase side effects
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Not recommended for use by women or children
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Use caution when combined with other medications affecting blood pressure or PDE5 inhibitors
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Frequently Asked Questions (FAQs)
Q: How soon does Viagra start working?
A: Viagra generally works within 30 to 60 minutes after taking the tablet.
Q: How long does Viagra last?
A: Effects can last up to 4 to 5 hours, allowing for flexible sexual activity.
Q: Can I take Viagra with food?
A: Yes, but a high-fat meal may delay its action.
Q: Is Viagra safe to use with other medications?
A: Consult your doctor, especially if taking nitrates or blood pressure medications.
Q: Can women use Viagra?
A: Viagra is not approved for use in women.
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