I am often asked which is the best of the three most common erectile dysfunction treatments: Viagra, Levitra or Cialis. Viagra is the most well-known of the three as it has been around for over 15 years. There is no simple answer to this question, as some men find one treatment works better for them than the others. This means that a lot is known about its effects and side effects. It works within an hour of taking a tablet, and is best taken on an empty stomach. The effects of Viagra will last for four to six hours. Viagra was developed and originally marketed by the pharmaceutical company Pfizer, and until 2013 Pfizer was the only company allowed to sell it. When Pfizer’s patent on Viagra expired, the market was open for other companies to produce the medicine, albeit under its generic name Sildenafil, rather than the brand name Viagra. Sildenafil contains exactly the same active ingredient as Viagra (sildenafil citrate), and works in the same way. how viagra works best Sildenafil belongs to a group of medications called phosphodiesterase type 5 inhibitors. It is used for the treatment of erectile dysfunction (male impotence). It helps to achieve and keep an erection sufficient for sexual activity. It does this by allowing a greater blood flow into the penis when a man is sexually aroused. It works only with sexual stimulation and does not increase sexual desire. This medication may be available under multiple brand names and/or in several different forms. Any specific brand name of this medication may not be available in all of the forms or approved for all of the conditions discussed here. Order accutane online forum Where can i buy prednisone online Jan 15, 2018. Sildenafil learn about side effects, dosage, special precautions, and more on MedlinePlus. xenical and alli Sep 26, 2008. Horny Goat Weed Shows Promise for ED. But what if ED could be helped by an extract from a plant called horny goat weed? Horny goat weed and related herbs have purportedly been treatments for sexual dysfunction for years. Each blue, diamond-shaped, film-coated tablet engraved with "N" on one side and "25" on the other side, contains sildenafil 25 mg. Nonmedicinal ingredients. Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Sildenafil (Revatio) is used to improve the ability to exercise in adults with pulmonary arterial hypertension (PAH; high blood pressure in the vessels carrying blood to the lungs, causing shortness of breath, dizziness, and tiredness). Children should not usually take sildenafil, but in some cases, a doctor may decide that sildenafil (Revatio) is the best medication to treat a child's condition. Sildenafil is in a class of medications called phosphodiesterase (PDE) inhibitors. Sildenafil treats erectile dysfunction by increasing blood flow to the penis during sexual stimulation. Sildenafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow easily. If you are taking sildenafil to treat erectile dysfunction, you should know that it does not cure erectile dysfunction or increase sexual desire. Sildenafil does not prevent pregnancy or the spread of sexually transmitted diseases such as human immunodeficiency virus (HIV). This leaflet answers some common questions about Viagra. It does not take the place of talking to your doctor or pharmacist. Your doctor has weighed the risks of you taking Viagra against the benefits they expect it will have for you. It should be used only under strict medical supervision. Viagra is used to treat erectile dysfunction, more commonly known as impotence, in men. If you have any concerns about taking this medicine, ask your doctor or pharmacist. This is when a man cannot get, or keep, a hard erect penis suitable for sexual activity. Viagra belongs to a group of medicines called phosphodiesterase type 5 inhibitors. This medicine is available only with a doctor's prescription. It works by relaxing the blood vessels in your penis when you are sexually excited. YOU MUST NOT TAKE VIAGRA IF YOU ARE TAKING NITRATES OR NITRITE MEDICATIONS. This allows blood to flow into your penis, allowing you to get an erection in the natural way. IT MAY LEAD TO A SEVERE DROP IN YOUR BLOOD PRESSURE, WHICH MAY BE DIFFICULT TO TREAT. BECAUSE SEXUAL ACTIVITY MAY PLACE A STRAIN ON YOUR HEART, YOUR DOCTOR WILL NEED TO CHECK WHETHER YOU ARE FIT ENOUGH TO TAKE VIAGRA. Sildenafil ingredients Viagra, Cialis and Levitra – which is best? -, Ingredient in Chinese Herb Acts as a Natural Viagra - WebMD Metformin axcount 1000mg How to buy clomid tablets Buy online levitra in usa Doxycycline for boils Buy generic propecia uk Viagra is a brand name medication invented by Pfizer, while sildenafil or sildenafil citrate is the active ingredient in Viagra that’s responsible for its positive effects on treating erectile dysfunction. Buy Sildenafil Viagra Active Ingredient Online ED Pills. Teva-Sildenafil - Uses, Side Effects, Interactions - Medicines containing the active ingredient sildenafil citrate - eMC New chewable Sildenafil & Tadalafil ED Treatments Online for Better Sex. Same FDA-approved active ingredients as in Viagra TM and Cialis TM Made in USA how old do you have to be to buy clomid Six of the 17 products contained sildenafil the active ingredient in Viagra or a substance similar to either sildenafil or vardenafil. Vardenafil is the active ingredient in Levitra, another FDA. Viagra Tablets is a brand of medicine containing the active ingredient Sildenafil. Find out about side effects, who can take it and who shouldn't use Viagra.