Drug Uses:
Brand Viagra is the most well-known drug for treating erectile dysfunction in men. The drug’s effect is based on increasing blood inflow to the penis, in the presence of sexual arousal. Viagra takes effect in 30 minutes after ingestion and remains effective for 4 hours.
According to its medical properties, Viagra is a drug used to treat a form of impotence – erectile dysfunction, i.e. circulatory disturbances in the blood vessels involved in the mechanism of erection. The active ingredient of the drug is a synthetic substance called Sildenafil Citrate.

How does Viagra work?
Viagra has been known to achieve a success rate as high as 90%. Viagra works by allowing the blood vessels in the penis to relax, which then allows more blood into these vessels resulting in increased pressure. Viagra also allows the blood pressure to be maintained in the penis which results in the body's ability to sustain an erection and enjoy a healthy sex life.

How to use?
Viagra is taken orally approximately 30- 60 minutes before engaging in sexual intercourse. Most people take a 50mg dosage once a day. Viagra can be effective in helping the body's natural mechanisms to achieve an erection for up to 4 hours. It is best to take Viagra with water, on an empty stomach as some foods change the absorption rate of the Viagra. Viagra does not cause erections without sexual stimulation or arousal.

*Exceptions to the usual dosage of Viagra
If you are taking any protease inhibitors it is suggested you only take a 25mg dose of Viagra and at times frequency may be limited to once in a 48-hour period. If you are over 65 or have serious liver or kidney problems you may also be advised to use a 25mg dose of Viagra. If you have any questions about the best dosage of Viagra for your needs you should consult a healthcare professional.

Viagra Side effects:
As with all medications, there is the possibility of side effects, although with Viagra the side effects tend to be mild. Side effects associated with Viagra usage may include vision abnormalities (light sensitivity or a difference in how the colors blue and green are perceived), acid indigestion, facial flushing and headaches. If you have any questions you should consult a physician or healthcare professional before taking Viagra. Men taking any nitrate-based medications, such as heart and angina prescriptions should not take Viagra.

Proper storage of Viagra:
Store Viagra at 77 degrees F (25 degrees C). Brief storage at temperatures between 59 and 86 degrees F (15 and 30 degrees C) is permitted. Store away from heat, moisture, and light. Do not store in the bathroom. Keep Viagra out of the reach of children and away from pets.