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To qualify for any form of patent in the US, an inventor must file a patent application with the PTO – an agency within the Department of Commerce – which is expected to be in three parts.

The first is the ‘specification part’, which generally describes the invention. The second is the ‘claims part’, which provides a more detailed statements explaining clearly how the invention works or is assembled. The third is the ‘drawings part’ that gives an illustrative framework of the invention.

Any inventor seeking to get a patent for his invention would need to hire a patent lawyer or a specially qualified professional called a patent agent to help guide him or her with the preparation of the application.
An official at the PTO, known as a patent examiner, would then review the application to determine if it qualifies for a patent.

This goes without saying that the applicant cannot receive any patent rights until the PTO approves and issues the patent.

It is expected that the patent examiner could ask the applicant to answer various questions about his or her invention, during the patent examination process.

By law, an applicant for patent is required to disclose all relevant information in his or her possession before the patent could be issued.
An important factor that the PTO would have to consider before granting an approval for any patent is the usefulness of an invention.

What this means is that no patent will be granted for any invention that is deemed only useful for illegal or immoral purpose.

In the pre-Viagra era, the existing treatments for ED were crude and often inconvenient to their users. However, satisfying the often time-consuming and cost-prohibitive procedures to get a patent for Viagra means that the introduction of the magic pills not only met the need for an invention to be useful, but also satisfied the unambiguous condition of how Viagra works.

Not only was the mechanism of action of Viagra delineated to get a patent for it, but the conditions under which the diamond-shaped pills should be taken were also fully explained.

Any one who is using any medicines that contain nitrates (e.g. nitroglycerin for chest pain) is strongly advised against taking Viagra tablets.

Also, before engaging in sexual activity, one is expected to discuss one’s general health status with his doctor to ensure that he is healthy enough.

After taking Viagra, and you experience nausea, chest pain, or any other discomforts during sex, seek medical help immediately.

Although erections that last for more than 4 hours could be a rare possibility with Viagra and the other ED treatments in the Viagra class, it is important to seek immediate medical help to avoid long-term injuries.

Also, men who are above 65, or men who have serious liver or kidney problems, could be started at the lowest dose of 25 mg of Viagra tablets.

People who are taking protease inhibitors –such as treatment for HIV – could be limited to a recommended dose of 25-mg dose in a 48-hour period to boot.

Viagra tablets online are not to be normally taken in combination with medications for high blood pressure such as alpha blockers, and when taken, are to be taken about four apart. In addition, patients who have prostate problems could be started you on a lower dose of Viagra.

Common side effects of online Viagra tablets are facial flushing, headache and upset stomach. Less common ones include bluish vision, blurred vision, or sensitivity to light.

The release of Viagra pills into the market came with the announcement that the discovery of the magic drug was serendipitous. The drug only became marketed as an anti-impotence drug after it was discovered that the men who were given the little blue pills to take home as part of clinical trials for a newly developed drug that was intended to be used for the treatment of Angina pectoris and pulmonary arterial hypertension produced a surprising, albeit welcome, side effects.

When the men refused to return the pills they were given, the pharmaceutical chemists who worked on the new formulation started asking questions, and it was soon found out that the reason why the men had refused to return the drug was because the drug had made the men attain erection, a scenario which was quiet alien to them prior to using Viagra tablets.

Fast forward more than ten years later, history is about to repeat itself, it seems.

A new drug – Flibanserin – has been developed in similar circumstances, but among women this time around.

Produced by the German drug maker Boehringer Ingelheim, Flibanserin (BIMT-17) is a drug that is currently being investigated as a drug for women who are experiencing a decrease in their sexual desire.

The German company had been simply trying to develop a fast-acting antidepressant, one that patients would respond to in a matter of days, not weeks as in most current treatments and hadn’t set out to produce a Viagra-like drug for women.

However, Boehringer Ingelheim reported on November 16, 2009, that late-stage trials for the Viagra-like drug showed that the drug enhanced sexual desire and increased the number of “satisfying sexual events” in women whose libidos were abnormally low.

The results of four Phase III studies involving over 2,000 woman who were in pre-menopausal stage and who were suffering from a type of disorder known as Hypoactive Sexual Desire Disorder (HSDD) were presented at the congress of the European Society for Sexual Medicine in France.

According to women who use the drug, the average number of times they experienced “satisfying sexual events” increased from 2.8 to 4.5 times a month. Women who used the placebo, however, said the number of times they experienced such satisfying sexual events increased to 3.7 times a month.

Unlike Viagra pills, Flibanserin must be taken once daily and could take up to a month before it can start to produce its effect.

Flibanserin increases dopamine and noradrenalin and decreases serotonin in animals.

Mechanism of action
Flibanserin helps to enhance female libido by directly manipulating the chain of chemical reactions in the brain that are believed to be responsible for triggering sexual desire.

This is quite different from Procter & Gamble’s hormone patch Intrinsa, which is aimed at helping women in their post-menopausal stage.

Clinical trials
As of November 2009, Phase III clinical trials are ongoing. The aim of these trials is to assess the safety and efficiency of the drug in pre- and post-menopausal women.

If this groundbreaking drug is passed safe and efficient for the treatment of sexual dysfunctions in women, it would be a major breakthrough in this widely unknown field.

You don’t hop into a Volkswagen and hope to get the same results that you would with a Ferrari. Oh sure, you can get to go really fast if you pressed down on the accelerator long enough, but the experience and outcome would just not be the same.

The same principle works with Viagra.  For the best anti impotence results you need to buy real Viagra. Since its release , many people have come out with different items all claiming to be Viagra. There are fake Viagra tablets that are sold on the internet. Unlike the real thing, they are not manufactured by the company Pfizer and—in most cases—carry no effective treatment for impotency.   When Pfizer announced the release of Viagra it also explained the mechanism behind its effective operation.

Viagra addresses the symptoms of erectile dysfunction by reducing the effects of an enzyme pde-5. Without pde-5, the various tissues in the body are better able to relax. When blood vessels become more pliable, it then becomes much easier for blood to flow through them. The penile areas consequently are able to receive adequate blood flow—the basic requirement for a successful erection.

The problem is many companies today are trying to duplicate the results of Viagra’s success by creating copies of their own. Today companies offer tablets that contain Sildenafil citrate—the core ingredient of Viagra and attempt to pass them of as Viagra. But while the design and production was a painstaking 8 year process involving tests and more tests before Viagra was released, these fake drugs are made overnight with no thought or concern for the health of the users.

For example, in Malaysia it was discovered that a health drink, touted to contain native sexual herbs was simply a composition of fruit juice mixed with Viagra tablets. Because the concoction was made with no adherence to dosages, many people suffered telling side effects with the use of the drug drawing eventual notice and action from the government.

This is why it is important to buy real Viagra. Viagra does not only just provide relief for the symptoms of erectile dysfunction; it has also been designed to give the least likelihood of side effects.  If you want to buy real Viagra tablets, you should pay attention to the tablets being offered. Real Viagra tablets are not white or pink. They are blue. They are designed in the shape of a diamond. When you buy real Viagra, you should find the dosage on one side of the pill and the name of the manufacturing company—Pfizer—on the other side.

Where you buy your Viagra tablets will also affect your eventual results. Because the internet is such a wide forum of opportunity, fake Viagra tablets are more commonly found there. However by visiting accredited online pharmacies, you can still get genuine Viagra tablets. Buy real Viagra tablets today by using online pharmacies with good feedback and established credibility.

Online pharmacies have grown in popularity because of their unique advantages. For instance it is easier to buy Viagra at cheap prices when you visit an online store. Online pharmacies are also very convenient since they can be accessed at any time of the day.

But perhaps the most telling advantage of online pharmacies is that they neatly address the one area that has been a source of worry to men suffering from impotency. They provide guaranteed protection against the gossiping and scrutinizing eye of the public. When you place your order for Viagra in your bedroom, you will be sharing that information with no one else. Buy real Viagra today.