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Buy Viagra
If you are buying Viagra for the first time, start with a small amount to make sure that drug works for you and then order more later.
If you have been taking this medicine for a while and will continue to take it regularly, buy as much Viagra as you can at once.
Our online pharmacy offer discounted prices when you buy Viagra in large quantities. Plus, you won't have to worry about refills for a while.
Viagra
Viagra contains the active ingredient sildenafil, which is a medicine used in the treatment of erectile dysfunction. Sildenafil is called a phosphodiesterase type 5 inhibitor, and works by preventing the action of a chemical in the body called phosphodiesterase type 5. Sildenafil is indicated for the treatment of impotence.
An erection is produced via a complex chain of events, involving signals from the nervous system and the release of chemical messengers within the tissues of the penis. One of these chemical messengers is called cyclic GMP.
Cyclic GMP causes the blood vessels in the penis to widen by relaxing a thin layer of muscle found in the blood vessel walls. This allows more blood to enter the penis, which ultimately results in the penis becoming rigid and erect.
Cyclic GMP is normally broken down by another chemical in the body called phosphodiesterase type 5. Sildenafil works by preventing the action of phosphodiesterase type 5, thus stopping the breakdown of cyclic GMP. This means that the blood vessels are kept dilated for longer, improving blood flow to the penis and maintaining an erection.
As Viagra enhances the actions of the chemical messengers responsible for producing an erection, it will only work once these messengers are present. This means that sexual stimulation is required for it to produce and maintain an erection. The dose should be taken approximately one hour before intended intercourse.
Dosage
Adult Males
Doses range from 25 mg to 100 mg, depending on the drug's effect. The usual dose is 50 mg. If you are over 65, have liver or kidney problems, or are taking erythromycin, ketoconazole, itraconazole, ritonavir, or saquinavir a dose of 25 mg may be sufficient. Your doctor will adjust the dosage if the drug is not working properly for you.
Take Viagra only before sexual activity. The manufacturer recommends a maximum of 1 dose per day (1 dose every 2 days for those taking ritonavir).
To avoid low blood pressure, do not take the 50-mg or 100-mg dose of Viagra within 4 hours of taking an alpha-blocking drug such as Cardura.
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