Drug Name
Brand Viagra (Sildenafil)

Drug Uses
Brand Viagra is an oral medication for erectile dysfunction (ED) developed by the pharmaceutical company PFIZER. It helps most men with ED improve their erections. That means they are able to achieve harder erections.
Brand Viagra has an established safety profile of over 10 years. It has been shown to work safely and effectively in men with ED. This includes:

• Men of all ages
• Men who have difficulty all the time or just some of the time

Men with other health issues such as high blood pressure, diabetes, and depression.

How to use
According to PFIZER recommendations Brand Viagra is usually taken only when needed, 30 minutes to 1 hour before sexual activity. You may take it up to 4 hours before sexual activity. Do not take Brand Viagra more than once per day.
Brand Viagra can help you have an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Follow your doctor's instructions.
During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away. You could be having a serious side effect of sildenafil.

Drug Class and Mechanism
Brand Viagra is a phosphodiesterase inhibitor. It works by helping the blood flow into a penis to achieve and maintain an erection.

Missed Dose
Brand Viagra is used as needed, so you are not likely to be on a dosing schedule.

Storage
Keep Brand Viagra in its original container. Store this medication at room temperature away from moisture, heat and light (between 59 and 86 degrees F (15-30 degrees C)). Keep this medication out of the reach of children.

Warnings/Precautions
The official Brand Viagra manufacturer PFIZER recommends you to follow these instructions.
Don't take Brand Viagra if you take nitrates, often prescribed for chest pain, as this may cause a sudden, unsafe drop in blood pressure.
Discuss your general health status with your doctor to ensure that you are healthy enough to engage in sexual activity. If you experience chest pain, nausea, or any other discomforts during sex, seek immediate medical help.
As with any ED tablet, in the rare event of an erection lasting more than 4 hours, seek immediate medical help to avoid long-term injury.
If you are older than age 65, or have serious liver or kidney problems, your doctor may start you at the lowest dose (25 mg) of Brand Viagra. If you are taking protease inhibitors, such as for the treatment of HIV, your doctor may recommend a 25-mg dose and may limit you to a maximum single dose of 25 mg of Brand Viagra in a 48-hour period.
In rare instances, men taking PDE5 inhibitors (oral erectile dysfunction medicines, including Brand Viagra) reported a sudden decrease or loss of vision. It is not possible to determine whether these events are related directly to these medicines or to other factors. If you experience sudden decrease or loss of vision, stop taking PDE5 inhibitors, including Brand Viagra, and call a doctor right away.
Sudden decrease or loss of hearing has been rarely reported in people taking PDE5 inhibitors, including Brand Viagra. It is not possible to determine whether these events are related directly to the PDE5 inhibitors or to other factors. If you experience sudden decrease or loss of hearing, stop taking Brand Viagra and contact a doctor right away.
If you have prostate problems or high blood pressure for which you take medicines called alpha blockers, your doctor may start you on a lower dose of Brand Viagra.
Brand Viagra does not protect against sexually transmitted diseases, including HIV.
The most common side effects of Brand Viagra are headache, facial flushing, and upset stomach. Less commonly, bluish vision, blurred vision, or sensitivity to light may briefly occur.

Possible Side Effects
According to the official Brand Viagra manufacturer PFIZER some people taking Brand Viagra may experience side effects. These are usually mild and do not last longer than a few hours. The most common side effects are:

• Headache
• Facial flushing
• Upset stomach

Less common side effects are temporary bluish vision or blurred vision, or being sensitive to light. In clinical studies:

• Patients rarely stopped taking Brand Viagra because of side effects
• The frequency of side effects has been shown to decrease over time

Taking Brand Viagra does not make you more dependent upon it to get or maintain an erection.

More Information
Thousands of Web sites will try to sell you fake Brand Viagra. Their drugs are illegal and have not been proven safe or effective. Protect yourself. Know that real Brand Viagra is only sold as a 25-mg, 50-mg, and 100-mg tablet.