Considering the efficacy and tolerability, a single dose of Viagra 50mg can be increased to 100 mg or decreased to 25 mg. Do not forget that the maximum single dose is 100 mg. In patients with impaired liver or kidney function and in elderly patients the dose adjustment is not required.

Viagra is a well-known commercial name of the most effective drug to increase potency. It was developed many years ago by the U.S. company Pfizer. International name of Viagra pills is Sildenafil. Less known drugs which are analogs of Viagra are Konegra, Ciagra, Genagra, and others. A large proportion of generic drugs including Viagra, Cialis, Levitra is made in India and are identical to the expensive American drugs, but cost significantly less than the original ED drugs.

The mechanism of action of sildenafil (Viagra 50mg, 100mg, 25mg): the drug gradually increases the amount of blood flowing to the penis. This helps a man to achieve a firm and most importantly completely natural erection. Viagra pills (Sildenafil) can only act when a man is naturally sexually aroused. When sexual intercourse is completed, the penis naturally returns to the normal relaxed state. All blue pills, including Viagra 50mg, has an effect of 4 hours.

If you decided to buy an ED treatment, you should start with Viagra 50mg as it is easy to adjust to your daily needs. You just have to remember to not take more than 2 pills of Viagra 50mg per day to avoid severe side effects.

Effect of the drug

The effect of Viagra has been discovered by chance, however it was so successful that it has been more than 10 years that Viagra helps men to deal with the problems of potency. The action of Viagra is very simple. When a man is sexually aroused, this leads to relaxation of smooth muscles of the penis and the enlargement of the arteries, which increases blood flow to the genitals and causes erection. Taking Viagra leads to a natural reaction that should occur in men during arousal but due to illness can not be reached. Viagra relaxes the muscles and increases the blood flow to the penis, and therefore there is a natural erection. However, Viagra does not enhances the sexual desire and does not stimulate libido. Without sexual stimulation and arousal, the action of Viagra will not be evident. All processes occur naturally.

Side Effects

Viagra is a safe and reliable treatment for erectile dysfunction. Clinical studies have not proved the drug to have dangerous to life and health side effects. When used properly, the side effects of Viagra is practically null. However, reactions of the body may be different, so you should know a list of possible adverse reactions. There may be a headache, facial flushing, nasal congestion, dizziness, temporary vision changes, palpitations, abdominal and chest pain. However, even these side effects pass quickly and are mild.

Viagra is a pharmaceutical product produced by the pharmaceutical giant Pfizer. According to the reports United States exported US$572.6 million worth of ED medication including and Viagra (sildenafil citrate). In the same time the sales of ED drugs in the USA reached $807.7 millions.

In 2010, US demonstrated a significant improvement in international sales of Viagra-type medications.

Top 10 Countries for United States Viagra Exports in 2010

During the first 11 months, US stated exported $709 million worth of ED drugs to more than 96 countries worldwide. This is 35.9% higher compared to the same period in 2009 when US exports were only $521.8 million.

Top 10 countries accounted more than 87% of US export sales of Viagra-type drugs.

• Germany (16.9% of total sales)
• Spain (15.9% of total)
• Ireland (12.7%)
• Netherlands (11.2%)
• France (6.6%)
• Canada (6.5%)
• Great Britain (6.3%)
• Mexico (5.6%)
• Japan (4.3%)
• Belgium (1.8%)

The Netherlands increased consumption of US Erectile Dysfunction drugs by 254.7%, Ireland by 148.5%

Top 10 Countries for United States Viagra Imports in 2010

Totally, the United States imported $612.2 million worth of Viagra-type drugs during 2010. This who a 17% decrease compared to the previous year. These are the following countries exporting Viagra and other ED products to the USA in 2010 year.

• Israel (28.2%)
• Norway (20.7%)
• Germany (12%)
• Belgium (9.4%)
• Japan (6.5%)
• Spain (5.6%)
• China (4.5%)
• Ireland (2.4%)
• Italy (2%)
• India (1.8%)

At current moment, Viagra-type sales are slowing down because of significant growing of Internet sales over the Internet. More and more customer prefer to buy cheap Viagra made in India which work the same as brand, and the cost is much lower. Do not miss your chance to buy Viagra cheap online at our online store.

“Doctors usually do not talk to older men about safe sexual intercourse, that is because of STD’s rate in this category of people is much lower than in younger patients” – researcher Anupam B. Jena said. “But what our investigation suggests is that just by virtue of asking for an Erectile Dysfunction drug, these men are identifying themselves as being at two or even three times higher risk of sexually transmitted disease”.

Researcher managed to examine insurances from a total 1,410,806 aged over 41 years of age. It was found that the men taking Levitra, Viagra and Cialis, the rate of STD’s was much higher compared to the group which didn’t take this group of drugs. The study suggests that those men engaging in behavior such as unprotected sex – are more likely to to take ED drugs.

The authors of the study agree that improved sex education is needed to older adults as well.

“We are typically unaccustomed to practice safe sex over the age of 50, because the risk of pregnancy is eliminated,” Jena said.

Another investigation conducted in Europe shows that nearly 15% of men over 50 years of age are diagnosed with HIV (AIDS).

Currently, the most of these elderly patients buy cheap Viagra online without a prescription and thus do not consult their doctor about the risk of sexually transmitted diseases.

What is the mechanism of action of drugs such as Viagra? Viagra is the best of the existant drugs treating erectile dysfunction. When a man is sexually aroused, Viagra (sildenafil) pumps blood into the penis, causing a persistent lasting erection. At the same drugs containing Sildenafil – brand or generic Viagra – do not affect other functions of the body, purposely acting only in their area. Viagra is used for erectile dysfunction of psychogenic, organic or mixed character.

Viagra should be taken 1 hour before the sexual intercourse. The recommended dose for adults is 50 mg once a day. Taking into account the individual tolerability and efficacy of the drug, the dose can be increased to 100 or decrease to 25 mg. The maximum daily dose is 100 mg.

By men’s reviews, Viagra is generally well tolerated. In rare cases, it may cause nausea, dizziness, and increased muscle tone, flushing, headache, and blurred vision.

Viagra is a drug used in men only. It is not intended for use in women and children. Elderly male patients should use Viagra with care and start with a lower dose of 25 mg. Also, Viagra must not be used together with nitrates as it may lead to severe adverse reactions. If a man has one of the following diseases, he should not take Viagra as well:

• intolerance to the components of the drug
• anatomical deformation of the penis
• tendency to bleeding
• liver dysfunction
• evere hypotension or hypertension
• leukemia, multiple myeloma and sickle cell anemia
• various heart diseases