Buy Viagra Online Without Prescription

Viagra is the brand name for the drug Sildenafil Citrate which is a potent drug used in the treatment of erectile dysfunction. It is also used for treatment of pulmonary arterial hypertension. The drug was introduced in the market by Pfizer and because of the advertisement and celebrity endorsement the drug achieved a great success and is the blue diamond shaped pills attained fame and familiarity all over the world. The drug was patented in 1996 and US Food and Drug Administration approved it as a drug fro the treatment of erectile dysfunction. By this recognition, Viagra became the first approved oral treatment for erectile dysfunction in US.

Even though Viagra is offered in US only against prescription, the product was advertised directly to the users through TV. There are many websites offering Viagra but offer it after online consultation. The popularity of Viagra has made many fake aphrodisiacs to appear in the market with names such as herbal Viagra! Many are made in the shape and the blue color of Pfizer’s product in diamond shape.

Mechanism of Viagra action:
There are several chemical agents involved in the process of penile erection. The sexual stimulation causes the release of Nitric Oxide by cavernous nerves. This stimulates the process of synthesis of cGMP.  Cyclic GMP is known to cause relaxation of the muscles in corpus cavernosm, though the exact way it is caused is still not known. PDE5 is responsible for degradation of cGMP and by inhibiting the action of PDE5 Sildenafil causes and retains the increased blood flow into penile region and helps to get prolonged erection. It must be noted that the action of inhibiting the PDE5 in itself does not cause erections. Drug Viagra has no effect in the absence of sexual stimulation as it merely inhibits PDE5 and possible degradation of cGMP.

Sildenafil is effective in treating ED!

Viagra has undergone great many tests and the efficacy and the side effects of Viagra under different conditions are well documented. Increased dosage results in improved erections and help to have prolonged erections. All the studies point that the usage of Viagra is effective and safe treatment to cure male impotence.

Viagra, available in 25, 50 and 10 mg pill must not be taken for more than once a day. The half life of Sildenafil Citrate makes it necessary to take 4 hours before the sexual activity.

Side effects of Viagra:
Though use of Viagra has been proved to be safe, there are several side effects observed. The common among them are headache, nasal congestion and impaired vision. In lesser number of cases it can cause flushing, dyspepsia and photophobia. Headache is a very common side effect. It can also cause high heart beat rate, nausea, palpitations, pain in chest etc. It can also cause sensation of spinning, tinnitus, weariness, and dry mouth, pain in the eyes, red eyes, double vision and other vision impairments. In few rare cases Viagra has caused sudden increase or decrease in the blood pressure, heart attack and stroke. Another rare side effect is called Priapism, which is a condition in which the erection will last fro hours. This is a serious condition that can have other effects like multiple myeloma or leukemia. Though the occurrence of such adverse effects is rare, nevertheless it calls for care to be exercised in using Viagra. This means that it is prudent to use Viagra in proper dosage by knowing whether your medical condition permits its use and this is best confirmed with a doctor. This is especially true for people with heart related conditions.

Generic Viagra sold through online stores:
If the generic Viagra is made in approved laboratories work as good as branded drug. Usually they cost substantially lower than the branded drugs. The research and the advertisement costs of generic drugs are much less than branded drugs. If the drug is coming from a trusted source and the medical condition of the individual permits the usage of Viagra, then it is safe to use generic Viagra as it offers substantial savings. You must seek the doctor’s opinion regarding the dosage and the prescription though you can buy Viagra online without prescription.

If you buy Viagra online without prescription it is important to know the difference of branded Viagra and generic Sildenafil Citrate. Reliable drug stores offer Viagra that has the same active content and thus actions of both are similar. But because of these generic drugs do not carry the overheads of branding and advertisements the cost of these drugs is much less than the branded ones.

However, you have to take certain precautions if you opt to buy Viagra online without prescription. If you are taking nitrates you should not take Viagra. Viagra may cause very unsafe conditions by sudden drop in blood pressure. Same is true for patients having liver or kidney problems or are over 65 years of age; in such cases, you must consult your doctor before taking Viagra.

If you decide to buy Viagra online without prescription you must be sure to check that the drug you are getting is not fake or counterfeit. It must be kept in mind when you are buying from websites that do not provide physical address.