Mô tả
Manufacturer
Pfizer
Contents
Sildenafil citrate
Indication
Viagra is indicated for the treatment of erectile dysfunction in men. Viagra is a phosphodiesterase type 5 (PDE5) inhibitor. It works by helping to increase blood flow into the penis during sexual stimulation. This helps you to achieve and maintain an erection.
Instruction
Use Viagra as directed by your doctor.
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Take Viagra by mouth with or without food. Viagra may not work as quickly if you take it with a high-fat meal.
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Viagra is usually taken about 1 hour before sexual activity; however, it may be taken anywhere from 4 hours to a half hour before sexual activity. Talk with your doctor about the best way to take Viagra.
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Viagra can help you have an erection when sexual stimulation occurs. An erection will not occur just by taking a pill.
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Do not take more than the recommended dose or take it more often than once daily, or as directed by your doctor.
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If you miss a dose of Viagra and you still intend to engage in sexual activity, take it as soon as you remember. Continue to take it as directed by your doctor.
Drug interaction
Organic nitrates, nitric oxide donors (amyl nitrite), ritonavir, ketoconazole, itraconazole, erythromycin, cimetidine, saquinavir.
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