How to find out if someone is taking viagra


Why take Viagra?

It works in pulmonary hypertension by relaxing blood vessels in the chest.

If you're taking sildenafil Revatio for pulmonary hypertension, do not take it more than 3 times a day. If sildenafil does not work, there are other tablets you could try that work in a similar way, such as:. You could also try a medicine called alprostadil. This is a man-made hormone that helps to stimulate blood flow to the 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.

You may benefit from treatment using injections of man-made hormones to restore your hormone levels to normal. Some complementary therapies, such as acupuncture, have claimed to treat erectile dysfunction. But there's little evidence they work.

Why men take Viagra | "I'm 26 and take Viagra on dates"

There's no firm evidence to suggest that taking sildenafil will reduce fertility in either women or men. Sildenafil does not affect any type of contraception, including the contraceptive pill and emergency contraception. Do not drink grapefruit juice if you're taking sildenafil Revatio for pulmonary hypertension. It interferes with the way the medicine works.

Page last reviewed: 22 January Next review due: 22 January Sildenafil including Viagra. About sildenafil Sildenafil is a medicine used to treat erectile dysfunction. It usually takes 30 to 60 minutes for sildenafil to work for erectile dysfunction. You can take it up to 4 hours before you want to have sex. Taking sildenafil alone will not cause an erection. You need to be aroused for it to work. The most common side effects are headaches, feeling sick, hot flushes and dizziness. Many men have no side effects or only mild ones.

Important information

It can be dangerous to take sildenafil if you also take medicines called nitrates often given for chest pain. The combination can cause a dangerous fall in your blood pressure. If you're not sure if you're taking a nitrate, ask your doctor or pharmacist. Sildenafil is called by the brand names Viagra for erectile dysfunction and Revatio for pulmonary hypertension.

Sildenafil is not suitable for some people. Do not take sildenafil if you: have had an allergic reaction to sildenafil Viagra or any other medicines in the past are taking medicines called nitrates for chest pain have a serious heart or liver problem have recently had a stroke or a heart attack have low blood pressure have a rare inherited eye disease, such as retinitis pigmentosa Check with your doctor before taking sildenafil if you: have sickle cell anaemia an abnormality of red blood cells , leukaemia cancer of blood cells or multiple myeloma cancer of bone marrow have a deformity of your penis or Peyronie's disease curved penis have a heart problem.

Your doctor should carefully check whether your heart can take the additional strain of having sex. Private prescription You can also get sildenafil on a private prescription from your doctor. From a pharmacy You can buy sildenafil from a pharmacy following a discussion with the pharmacist. It's important to take it as advised by your doctor or pharmacist. How much will I take for erectile dysfunction?

What if a woman takes Viagra?

The usual dose is 50mg, when you need it no more than once a day. The dose can be increased to mg or decreased to 25mg depending on its effect. How much will I take for pulmonary hypertension? The usual adult dose is 20mg taken 3 times a day.

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Doses for children can range from 10mg to 20mg taken 3 times a day, depending on their weight. How to take it Swallow tablets whole with a glass of water or juice but not grapefruit juice. Liquid sildenafil If you or your child are taking sildenafil as a liquid, 1ml is usually the same as taking a 10mg tablet, but it's important to always check the medicine label. Liquid sildenafil will usually be made up for you by your pharmacist. The medicine will come with a plastic syringe or spoon to help you take the right amount. What if I forget to take it? Never take 2 doses at the same time.

Never take an extra dose to make up for a forgotten one.

If you often forget doses, it may help to set an alarm to remind you. What if I take too much? Taking too much sildenafil by accident can cause unpleasant side effects, such as: headaches dizziness indigestion blocked nose altered vision Talk to your doctor if you have taken too much sildenafil and you're worried about these side effects. Common side effects Common side effects happen in more than 1 in people.

If you get these side effects, keep taking the medicine, but tell your doctor or pharmacist if these side effects bother you or do not go away: headaches feeling sick hot flushes, including facial flushing indigestion a colour tinge to your vision or blurred vision stuffy nose dizziness Serious side effects Serious side effects are rare and happen in less than 1 in 1, people.

Stop taking sildenafil and call a doctor straight away if you get : chest pains - if this happens during or after sex, get into a semi-sitting position and try to relax; do not use nitrates to treat your chest pain prolonged and sometimes painful erections - if you have an erection that lasts for more than 4 hours, contact a doctor immediately a sudden decrease or loss of vision a serious skin reaction - symptoms may include fever, severe peeling and swelling of the skin, blistering of the mouth, genitals and around the eyes seizures Serious allergic reaction In rare cases, it's possible to have a serious allergic reaction anaphylaxis to sildenafil.

Urgent advice: Contact a doctor straight away if:. A serious allergic reaction is an emergency. These are not all the side effects of sildenafil. For a full list, see the leaflet inside your medicines packet. Information: You can report any suspected side effect to the UK safety scheme. Sildenafil is not recommended in pregnancy and while breastfeeding.

Non-urgent advice: Tell your doctor if you're:. Some medicines do not mix well with sildenafil. Tell your doctor if you're taking these medicines before you start sildenafil : nitrates for chest pain riociguat for pulmonary hypertension recreational drugs called poppers, such as amyl nitrite Mixing sildenafil with herbal remedies and supplements Some complementary therapies may have ingredients that could interfere with sildenafil and cause side effects.

Important Tell your doctor or pharmacist if you're taking any other medicines, including herbal remedies, vitamins or supplements.

How does sildenafil work? Sildenafil belongs to a group of medicines called phosphodiesterase 5 PDE5 inhibitors. 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.

This is what happens to your penis when you take Viagra - minute by minute

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.

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