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Viagra Generic Usa

viagra generic usa

About viagra generic usa

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.

Instructions

Use Viagra as directed by your doctor.

Take Viagra by mouth with or without food. Viagra may not work as quickly if you take it with a high-fat meal.

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.

Viagra can help you have an erection when sexual stimulation occurs. An erection will not occur just by taking a pill.

Do not take more than the recommended dose or take it more often than once daily, or as directed by your doctor.

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.

Dosage

For most patients, the recommended dose is 50 mg taken, as needed, approximately 1 hour before sexual activity. However, Viagra may be taken anywhere from 4 hours to 0.5 hour before sexual activity. Based on effectiveness and toleration, the dose may be increased to a maximum recommended dose of 100 mg or decreased to 25 mg. The maximum recommended dosing frequency is once per day.

Ask your health care provider any questions you may have about how to use Viagra.

History of sildenafil as Viagra

Sildenafil citrate was created in 1989 by British scientists Albert Wood and Peter Dunn as a possible treatment for hypertension and angina; conditions associated with coronary heart disease. In 1991 Dr. Nicholas Terrett, now often referred to as the father of Viagra, was named in the British patent for the drug as a heart medication. And though Pfizer’s early trials of the drug in the 1990s did not prove its efficacy as a heart medication, patients who took part in the clinical trials reported increased erections after taking sildenafil. Separate studies provided more information on the biochemical process that causes erections, which helped scientists understand how sildenafil could enhance the effects of sexual stimulation and open up blood vessels in the penis. Sildenafil was then studied in men with erectile dysfunction, and in 1998 it was approved by the FDA specifically for treatment of ED.

Important Safety Information

Sildenafil tablets were shown to potentiate the hypotensive effects of nitrates, and their administration to patients who are using nitric oxide donors such as organic nitrates or organic nitrites in any form either regularly and/or intermittently is contraindicated. Sildenafil tablets are contraindicated in patients with a known hypersensitivity to sildenafil, as contained in sildenafil tablets and REVATIO®2, or any component of the tablet. Do not use sildenafil tablets in patients who are using a GC stimulator, such as riociguat. Sildenafil tablets may potentiate the hypotensive effects of GC stimulators.

Sildenafil (generic Viagra) becomes available

When Pfizer lost its UK patent for the drug in June 2013 it made way for generic manufacturers to produce sildenafil, or ‘generic Viagra’. It costs a fraction of the price of Viagra, and has made the treatment more accessible to a wider range of patients. You can now choose to buy Viagra, Pfizer’s branded drug, or sildenafil, the generic version.

Blue or white pills?

Branded Viagra comes in small diamond-shaped blue pills – Pfizer has also patented this pill design and appearance. Sildenafil is sold as white or blue tablets, with different characteristics depending on the brand. Some have chalky finishes while others are smooth, and some are scored for easy division, while others are not. Both Viagra and the different brands of sildenafil can be purchased in 25mg, 50mg, and 100mg preparations, and there is no significant difference between them in terms of active ingredients.

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