Sildenafil is a common medication used to stimulate erections in men with erectile dysfunction (ED) and treat certain heart conditions. Many factors can influence how long Viagra takes to start working. In general, Viagra takes about 30 minutes to produce noticeable effects. But your diet, your overall health, the medications you’re taking, underlying conditions, and much more can all affect the amount of time Viagra takes to work in your body and how long it lasts. An erection happens when nerves in your penis are stimulated. Then, muscles around two cylinder-shaped chambers of spongy material along your penis, known as the corpus cavernosa, relax and allow blood to flow in, causing an erection. With ED, your nerves don’t communicate properly with your brain and blood doesn’t flow properly into the corpus cavernosa. Taking Viagra relaxes the walls of your blood vessels and lets blood flow more easily into the parts of your penis that cause an erection. You’ll still need to feel sexually aroused to get an erection. Sildenafil is a medicine used to treat erectile dysfunction. It increases blood flow to the penis to help men get an erection. At least two-thirds of men have improved erections after taking it. Sildenafil is also sometimes used to treat pulmonary hypertension (high blood pressure in the blood vessels that supply the lungs). This medicine is available on prescription and can also be bought from most pharmacies. It comes as tablets that you swallow, chewable tablets, and as a liquid that you drink. Sildenafil for erectile dysfunction (Viagra) can be taken by men aged 18 and over. Sildenafil for pulmonary hypertension (Revatio) can be taken by adults and children aged 1 and over. Do not take sildenafil if you: You can get sildenafil on the NHS if you have erectile dysfunction or pulmonary hypertension. Viagra when to take Zoloft and autism Pack of 50mg sildenafil citrate film-coated tablets · Sildenafil. How well Viagra works, or how long it lasts for, depends on a number of things. This video explains the mechanism of action how it works of Viagra and its active ingredient sildenafil. See risks and benefits. Find tips on how to take VIAGRA® sildenafil citrate. Links to other sites are provided as a convenience to the viewer. Pfizer accepts no responsibility for the content of linked sites. This website is neither owned nor controlled by Pfizer. Pfizer does not endorse and is not responsible for the content or services of this site. Continue You are now leaving to enter a website neither owned nor operated by Pfizer. Links to all outside sites are provided as a resource to our visitors and do not imply an endorsement or recommendation of a particular physician by Pfizer, nor an endorsement of any Pfizer product by a telehealth provider or any physician. Pfizer accepts no responsibility or liability for the content or services of other websites. Sildenafil works by helping more blood get into your penis when you are sexually aroused. 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 the messengers released when you are aroused is called cyclic GMP. Cyclic GMP relaxes and widens the blood vessels in the penis, allowing more blood to enter. Cyclic GMP is normally broken down by an enzyme in the body called phosphodiesterase type 5 (PDE5). Sildenafil is a type of medicine called a PDE5 inhibitor. It works by stopping this enzyme from breaking down the cyclic GMP. This allows the blood vessels in the penis to stay dilated for longer, which improves blood flow to the penis and helps produce and maintain an erection. Sildenafil how it works What is ED? VIAGRA® sildenafil citrate Safety Info, VIAGRA Mechanism of Action - How It Works, Sildenafil MOA. Prednisone joint pain reliefAzithromycin oralSolumedrol to prednisone conversionAmoxicillin joint painBuy tretinoin uk Take this tour of medicine's future with some of the trailblazing doctors charting its course. Once you've seen a transplantable human kidney created from a 3D. BUY VIAGRA GENERIC VIAGRA ONLINE. Tips for Taking VIAGRA® sildenafil citrate Safety Info. Sildenafil Tablets -. Best Male Enhancement - Generic Cialis & Viagra Online but some of the most common medications for the most common diseases may affect their sexual health. These are. Buy Kamagra tablets online from Exact Pharma - the leading UK supplier of Erectile Dysfunction medication for men. Kamagra tablets contain Sildenafil Citrate. In combination with sexual stimulation, sildenafil works by increasing blood flow to. To treat erectile dysfunction-ED, take this drug by mouth as directed by your.