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Product Description

 Viagra is an oral medication for erectile dysfunction (ED) developed and manufactured by Pfizer in the United States. The main active ingredient of Viagra is sildenafil, with each tablet containing 100mg. Viagra is also known as: Sildenafil, used to treat erectile dysfunction and premature ejaculation with significant improvement effects.

The Origin of Viagra:
Sildenafil was developed by Pfizer Pharmaceuticals at its research center in Sandwich, Kent, United Kingdom. It was originally designed as a PDE5 inhibitor for the treatment of cardiovascular disease and entered clinical trials. Researchers hoped that sildenafil could relax cardiovascular smooth muscle by releasing the bioactive substance nitric oxide, thereby dilating blood vessels and alleviating cardiovascular conditions. However, the first clinical trial at Morrison Hospital in Swansea showed that sildenafil's cardiovascular effects did not meet researchers' expectations, and its performance as a cardiovascular drug was disappointing, failing to become a successful therapeutic treatment.

In April 1991, the clinical research on sildenafil was officially declared a failure, but a side effect reported by trial participants caught the researchers' attention. Researchers noticed that participants were reluctant to return the remaining medication after receiving trial doses. Upon investigation, they discovered that this drug improved patients' sexual performance. With permission from Pfizer's senior management, researchers conducted studies on sildenafil's effects on penile corpus cavernosum smooth muscle, and on March 27, 1998, it received marketing approval from the U.S. Food and Drug Administration. It quickly achieved commercial success, generating $1.934 billion in profit for Pfizer in 2008, making it a product that brought great renown to the company.

How Viagra Works:
Viagra is an oral medication for treating male erectile dysfunction. It effectively promotes blood circulation in the male body, facilitating rapid expansion of the penile corpus cavernosum, resulting in quick, firm, and thick erections. Patient satisfaction and improvement in sexual function among those with erectile dysfunction can reach over 85%.

Who Should Use Viagra:
Adult men with reduced libido, weak erections, or impotence. After use, it quickly produces firm erections, enhances intercourse quality, shortens recovery time between sessions, reduces fatigue, eliminates premature ejaculation, activates kidney function, and enhances testicular cell secretion.

Side Effects of Viagra:
Viagra causes side effects in approximately 2.5% of users, including: mild headache (16%), facial flushing (11%), decreased appetite (7%), temporary visual disturbances (3%), etc. The probability of other serious complications is less than 2%.
Common adverse reactions to Viagra include: dizziness, nasal congestion, indigestion, and temporary visual abnormalities, which may manifest as difficulty distinguishing blue/green colors, increased light sensitivity, or blurred vision. Most of these adverse reactions are caused by relaxation of related smooth muscles.

Dosage and Administration:
When taking Viagra, avoid using other sexual enhancement medications simultaneously. Each tablet contains 100mg. For first-time users, it is recommended to start with a lower dose: take 1/4 or 1/2 tablet initially, then adjust based on individual response to the medication. If there is no effect after several doses, it is advised to discontinue use.

【Name】: Viagra (Sildenafil)
【Ingredients】: Sildenafil 100mg per tablet
【Specifications】: 4 tablets per box / 30 tablets per bottle
【Shelf Life】: Three years
【Manufacturer】: Pfizer Pharmaceuticals, USA
【Usage】: Take 1 hour before sexual activity, 1 tablet per dose.

【Precautions】: Avoid exceeding the recommended dosage. Take once daily, one tablet at a time. Do not overdose. If a persistent erection occurs, rinse the penis with cold water.