Viagra, Cialis, Levitra, and generic sildenafil are all part of a family of drugs called PDE-5 inhibitors. These drugs are used to treat erectile dysfunction (ED). Erectile dysfunction medication works by preventing the chemical process that lets blood leave an erect penis. Basically, PDE-5 inhibitors tip the chemical balance in the penis to favor getting and maintaining an erection. The biggest difference between Viagra and generic sildenafil is the amount of active ingredient in each pill. The other main difference is that generic sildenafil is FDA approved to treat Pulmonary Hypertension (that’s high blood pressure between the heart and lungs) while Viagra is FDA approved to treat erectile dysfunction. It’s a little confusing since both medications use the same active ingredient, but Viagra and sildenafil work in the same way. 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. Duloxetine used for Cialis 20mg cost NHS medicines information on sildenafil - what it's used for, side effects, dosage. It usually takes 30 to 60 minutes for sildenafil to work for erectile dysfunction. While these reviews might be helpful, they are not a substitute for the. For Erectile Dysfunction "Sildenafil did not work for me at all, not even the 100 MG pill. However the length of time Viagra takes to work can be affected by food. Viagra should be consumed at least an hour before sex to allow maximum time to. The length of time Viagra lasts for will vary from person to person, but it can work for up to 5 hours at a time. This doesn’t mean you will have an erection for 5 hours, it means you will be able to get them easier during this time. Most men will find, that the effects of the pill will start to wear off 2 to 3 hours after first taking it. There are some things that will affect how long Viagra will last for in your case. These are listed in the “What will affect how long Viagra lasts for? To make sure Viagra lasts as long as it’s supposed to, you should always give correct information about your current and past health, and details of any medications you are currently taking when starting a course of treatment with Viagra. One study showed that an hour after taking Viagra for erectile dysfunction, men were able to get erections that lasted 33 mins on average. This dropped to 23 mins if they’d taken it 8 hours beforehand and 16 mins if they took it 12 hours beforehand. 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. Sildenafil how does it work How Does VIAGRA® sildenafil citrate Work? Safety Info, Sildenafil Reviews & Ratings at Cheap viagra europeOrder diflucan from canadaBuy nizagara australiaBuy viagra online lloyds pharmacyWhere can i buy cialis in australia with paypal In The Matrix, Morpheus counsels Neo to choose between a blue pill that will allow him to continue living a happy existence, or a red pill that. What to do when Viagra doesn't work for you - NetDoctor. How Long Does Viagra Take To Work? LloydsPharmacy Online.. How Long Does Viagra Last Effects, in Your System, More - Healthline. What is Viagra? How does it work? Is it effective? What are the side effects? Find answers to your most important questions about Viagra. Viagra and other ED drugs are increasingly being misused and even abused. Learn about the risks of recreational ED drug use. What is in sildenafil? Generic sildenafil contains the active ingredient sildenafil citrate. It is a PDE5 inhibitor that works by facilitating blood flow.