Health Conditions Discover Plan Connect. Frequently asked questions. What factors can affect my dosage? How is Viagra taken? What if I miss a dose? What should be done in case of overdose? What should I ask my doctor? Ask a pharmacist. Does Viagra Have an Effect on Women? Does Medicare Cover Viagra? Read this next. How Long Does Viagra Last? Medically reviewed by University of Illinois. Medically reviewed by Alana Biggers, M. Do Male Enhancement Pills Work?
Here's What Experts Say. Viagra vs. Cialis vs. Levitra vs. Stendra: Which Is Best? Medically reviewed by Alan Carter, Pharm. When PDE-5 is inhibited, levels of cGMP remain elevated, which relaxes smooth muscle and encourages blood vessels to widen a process known as vasodilation. That makes blood flow more freely to the penis, improving erectile function. A real, U. Sildenafil is also sold as a drug for high blood pressure called Revatio, although the doses of Revatio are different. Viagra should be taken one to four hours before sexual activity.
You must feel sexually aroused for it to help produce an erection. Brand name Viagra is available in three dosages: 25mg, 50mg, and mg. Sildenafil can also be prescribed off-label as the generic of Revatio in doses of 20 mg, 40 mg, 60 mg, 80 mg, and mg. Viagra 50 mg is the most common starting dose. The dosage prescribed often depends on:. The goal of ED medication is to find the least amount of medication that provides a satisfactory erection. The goal is not to find the highest dose of Viagra you can handle, but to find a dose that is safe and effective.
Certain health conditions may impact your ability to absorb Viagra. Those include liver or kidney disease. This increases the blood supply to the lungs and reduces the workload of the heart.
How well does it work for erection problems? Sildenafil works well for erectile dysfunction. In general, at least two-thirds of men say they have harder erections after taking it.
If sildenafil does not work for you, it may be because: you have not waited long enough after taking it before trying to have sex you have waited too long after taking it to have sex the dose is not high enough you're not sexually aroused enough. How long does it take to work? Sildenafil usually starts to work within 30 to 60 minutes. It's triggered by sexual stimulation, so you need to be aroused for it to work. How long will it work for?
You should be able to get an erection at any time between 1 and 4 hours after taking sildenafil. Your erection should go away after you have had sex. Can I take it as often as I want? If you're taking sildenafil for erectile dysfunction, do not take it more than once a day. Is it safe to take it for a long time? Sildenafil is safe to take for a long time.
There do not seem to be any lasting harmful effects from taking it for many months and years. Are there any other medicines that can improve erections? If sildenafil does not work, there are other tablets you could try that work in a similar way, such as: tadalafil Cialis - can be taken up to 36 hours before sex avanafil Spedra - can be taken up to around 4 hours before sex vardenafil Levitra - can be taken up to around 4 hours before sex You could also try a medicine called alprostadil.
Alprostadil comes as: an injection directly into your penis a small pellet placed inside your urethra the tube that carries urine from your bladder to the tip of your penis If you cannot get erections because of a hormonal problem, your GP may refer you to an endocrinologist who specialises in the treatment of hormonal problems.
Are there other treatments for erectile dysfunction? Other treatments for erectile dysfunction include: a vacuum pump psychological treatments penile implants pelvic floor muscle exercises Some complementary therapies, such as acupuncture, have claimed to treat erectile dysfunction. Is there a herbal Viagra? There are lots of treatments that claim to be a "herbal Viagra".
In fact, there's no such thing. A herbal Viagra has never been approved as a treatment for erectile dysfunction. Plus, these treatments may be fake or unsafe.
Can women use it? Women can use sildenafil for pulmonary hypertension. There's no good evidence that sildenafil works for women with sexual problems. Will it affect my fertility? But speak to a pharmacist or your doctor before taking it if you're trying to get pregnant.
Will it affect my contraception? Can I drink alcohol with it? A beer or a couple of glasses of wine are not likely to stop or delay sildenafil working. But drinking lots of alcohol can make it more difficult to get an erection. To get the most benefit from sildenafil, do not drink heavily before taking it. Higher doses increase the chance of a patient experiencing abnormal vision.
Other than its approved medical uses, Viagra has also been shown to have alternative applications. For example, researchers have shown adding Viagra to the water of cut flowers makes them last longer. Viagra is one of the most counterfeited medicines in the world.
Because of its wide appeal many patients attempt to buy it without a prescription. Viagra can be bought from online auction sites, internet pharmacies and even bricks-and-mortar retail stores.
There are numerous risks in taking counterfeit Viagra. Fake tablets can contain no Viagra or too much Viagra. There have also been reports that counterfeit tablets have contained blue printer ink — to give them that genuine Viagra look — illegal drugs like amphetamines, and other unrelated drugs like the antibiotic metronidazole.
The best way to ensure you are not buying counterfeit Viagra is to have a trusted pharmacist fill your script in-store. For those patients who need to have their Viagra script filled over the internet, there are some ways to check whether the medicine you have been supplied is fake.
Look for the writing stamped into the tablets.
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