Internet is a great marketplace where you can buy virtually anything. When speaking about drug purchase online, you can get lower prices and greater convenience. Most men buy Viagra online, as well as other medications for erectile dysfunction, but in many cases that means they avoid the necessary medical examination, which is required for purchasing a drug with a prescription. And it's not such a good idea. The PDE-5 inhibitors (which Viagra is) are very powerful drugs, and like with other prescription medications, a professional should supervise the dosage and consumption of these substances.

Those who buy Viagra online not having a prescription for it may risk their health, but still they know what they are purchasing. But those who prefer buying cheap herbal medications claimed to be as effective as Viagra are definitely asking for trouble. For example the “all-natural” drug known in the United States as Actra-Rx and Niagra is reported by the FDA to contain prescription levels of sildenafil — the active component of Viagra. And some men, who were warned by their doctors against using Viagra due to health problems may be tempted by the offer and get such a drug, which in most cases can be traumatic or even life-threatening.

Although you never hear it in ads or on television, the three most popular ED drugs - Viagra, Levitra, and Cialis - are quite similar in their effects and mechanism of action. Although they have certain differences, the risks of buying these drugs without prescription and using them without a doctor's supervision are the same. So when you buy Viagra online, make sure to at least consult with your doctor about the dosage.