FDA approved three drugs for the treatment of impotence: Cialis, Viagra and Levitra. All the three drugs work in the manner to increase the blood flow into the penis by relaxing the penile artery. These drugs are very much helpful to increase the erection. It is the effectiveness of the medicines in relation to the time they stay effective that separates them.

The effectiveness of viagra remains up to 4 hours and up to 5 hours for Levitra, but the effectiveness of cialis remains up to 36 hours and that’s why it is called “Weekend Drug” and the second largest selling ED drug in the world.

Now Viagra, Levitra or Cialis have presence in more than 80 countries and the World Wide Web make it available everywhere. Now online offer cheaper prices of impotence pills as well as you can get free consultation. Now days to buy cialis one doesn’t have to go to the chemist but it’s just a click away on internet.

Today more than 50 millions of men are suffering from erectile dysfunction in US alone. The research on erectile dysfunction shows that 30% men in the world are suffering from erectile dysfunction and 50% men over the age of 40 are severely.

Viagra and Cialis have made the good presence in the world for erectile dysfunction on the other hand Levitra is also gaining popularity over a short span of time. Most of the men started with the Viagra but they ended with cialis just because it is more effective and the effect of drug remains for 36 hours. Always consult to a healthcare practitioner before taking any erectile dysfunction drugs. Cialis can be taken without food or after having good diet.

Levitra is on the other hand a good erectile dysfunction drugs, but Levitra has fewer side effects compare to Viagra and Cialis. Levitra is very good for those men who have side effects with Viagra or Cialis.

About Viagra

Maintaining an erection is just as important as getting one. Viagra is known to help with both, thus leading to a more satisfying sexual experience with your partner.

Sildenafil Citrate sold as Viagra, acts by inhibiting GMP specific phosphodiesterase type 5, an enzyme that regulates blood flow in the penis. Since becoming available in 1998, Sildenafil has been the prime treatment for erectile dysfunction. Its primary competitors on the market are Tadalafil (Cialis) and Vardenafil (Levitra).

The mechanism of action of Sildenafil Citrate involves the release of nitric oxide in the corpus cavernous area of the penis. Nitric oxide binds to the receptors of the enzyme guanylate cyclase which results in increased levels of cyclic guanosine monophosphate (cGMP), leading to smooth muscle relaxation, resulting in increased inflow of blood and an erection.

It is best to understand that with the use of Viagra, you do not get an instant erection. In order to get an erection and for the Viagra to work, you must be aroused. After taking Viagra, the results can be seen in about 30 minutes to 1 hour as it works differently in individuals. For some men, it works in as little as 14 minutes. Normally the lasting period for Viagra is 4 hours.

After sexual intercourse, your erection will go away. In the case that your erection lasts for 4 hours or longer, you must consult a doctor immediately as this may harm your penis. In order to get quick results, it is advisable to take Viagra on an empty stomach or after eating a low-fat meal. If taken with a high-fat meal, there may be a delay in absorption of Sildenafil and the peak effect might be reduced slightly as the plasma concentration will be lowered.

Like with all medication, Viagra works the first or second time for most men. But for some men this might not be the case. So if Viagra does not work for you, don’t give up on it. Try taking it again. Keep in mind that Viagra can be taken as often as once a day, every day. If you still do not get results, talk to your doctor. Often a dose adjustment can make all the difference.

Who can take Viagra?

First manufactured about 10 years ago, Viagra has an established safety report. It has been known to work safely and effectively in men of all ages with ED. Viagra also works well in men who have regular or sporadic difficulty, as well as in men with other health issues such as high blood pressure, diabetes, and depression.

Comes in the strength of

Viagra has proven efficacy in helping men with erectile dysfunction (ED) achieve harder long-lasting erections. During initial use of Viagra, the need for a dose adjustment might be possible. This can easily be sorted out by your doctor.

Viagra comes in three doses of: 25mg, 50mg, and 100mg. Doctors more often than not start their patients on the 50mg tablet. But many men find that Viagra 100mg works better for them.