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. sertraline hcl used for When a man is sexually excited, the penis rapidly fills with more blood than usual. With this extra flow of blood, the penis then expands and hardens. After the man is done having sex, this extra blood flows out of the penis back into the body. In an opposite extreme situation, if an erection lasts for a long time (more than 6 hours), it can permanently damage your penis. You should call a doctor immediately if you ever have a prolonged erection that lasts more than 4 hours. Therefore sexual activity may not be advisable for people who have heart problems. Before you start any treatment for erectile dysfunction, ask your doctor if your heart is healthy enough to handle the extra strain of having sex. If you have chest pains, dizziness or nausea during sex, stop having sex and immediately tell your doctor you have had this problem. This is called erectile dysfunction if it becomes a frequent problem. Erectile dysfunction is a serious problem that can affect both the young and the old, involving psychological causes in some cases. Among other treatments that are nowadays available for erectile dysfunction, Viagra was the first. Some conditions and medicines interfere with the natural erection process. Erectile dysfunction, defined today as the inability to attain and maintain an erect penis with sufficient rigidity for sexual intercourse, has become an increasingly common complaint that affects 140 million men worldwide. So Viagra stands out as the pioneer of drugs that treat erectile dysfunction, for twenty years. Sildenafil citrate was the first oral agent to be introduced for the treatment of erectile dysfunction, thanks to the researchers from Pfizer. Sildenafil is the active substance of Viagra, while Viagra is the commercial name. Teva’s generic Viagra has launched already in December 2017 in the United States. Risk factors for developing erectile dysfunction include age, diabetes, hypertension, obesity, lack of exercise, dyslipidemia, smoking, depression, lower urinary tract symptoms, and pelvic surgery. Sildenafil is a highly selective inhibitor of PDE type 5 and enhances NO-mediated relaxation of human corpus cavernosum. Pfizer recently started to sell the new generic version of Viagra. Nolvadex source Zithromax overdose Viagra supplies Sildenafil 100mg 4 tablets from Pharmacy2U, the UK's leading online pharmacy. Sildenafil is widely used for the treatment of erectile dysfunction. does ciprofloxacin treat chlamydia Feb 5, 2018. Many factors can influence how long Viagra takes to start working. mg dose won't last as long as the largest available 100-mg dose. When VIAGRA 100 mg was co-administered with amlodipine 5 mg or 10 mg to hypertensive patients, the mean additional reduction on supine blood pressure. 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. Each film-coated tablet contains 100 mg Sildenafil (as sildenafil citrate). Excipient with known effect: Each 50 mg film-coated tablet contains 7.3 mg lactose monohydrate. Sildenafil is indicated in adult men with erectile dysfunction, which is the inability to achieve or maintain a penile erection sufficient for satisfactory sexual performance. In order for Sildenafil to be effective, sexual stimulation is required. Use in adults The recommended dose is 50mg taken as needed approximately one hour before sexual activity. Based on efficacy and tolerability, the dose may be increased to 100mg or decreased to 25mg. The maximum recommended dosing frequency is once per day. If Sildenafil is taken with food, the onset of activity may be delayed compared to the fasted state (see Section 5.2). Elderly Dosage adjustments are not required in elderly patients (≥ 65 years old). Sildenafil tablets 100 mg What you need to know before you take Sildenafil tablets 6., How Long Does Viagra Last Effects, in Your System, More - Healthline Buy cialis uk suppliers Buy proscar hong kong See risks & benefits. Learn about VIAGRA®sildenafil citrate Single Packs in 50mg and 100mg doses, the same prescription coverage as VIAGRA® pills in a. Check Out VIAGRA® sildenafil citrate Single Packs Safety Info Viagra Sildenafil Citrate Side Effects, Interactions, Warning. How Long Does Viagra and Other ED Medication Last? - Hims Nov 26, 2018. Man on the tube checking how long Viagra lasts on his smartphone. Viagra comes in dosages of 25mg, 50mg, and 100mg. Higher dosages. sildenafil nitroglycerin Feb 14, 2018. So Viagra stands out as the pioneer of drugs that treat erectile. the first dose of sildenafil 100 mg but continued therapy after a dose reduction. Viagra tablets come in three standard doses of 25mg, 50mg and 100mg. Which dose you should use to treat your condition depends on your general health and.