sildenafil (as citrate)
Consumer Medicine Information
NOTICE: This Consumer Medicine Information (CMI) is intended for persons
living in Australia. This page contains answers to some common
. It does
not contain all the information that is known about
. It does not take the
place of talking to your doctor or pharmacist. All medicines have risks
and benefits. Your doctor has weighed the risk of you using this medicine
against the benefits he/she expects it will have for you. If you have
any concerns about using this medicine, ask your doctor or pharmacist.
Bookmark or print this page, you may need to read it again.
What Viagra is used for
Viagra is used to treat erectile dysfunction, more commonly known as impotence, in men. 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.
It works by relaxing the blood vessels in your penis when you are sexually excited. This allows blood to flow into your penis,
allowing you to get an erection in the natural way.
Viagra will work only if you are sexually excited.
Viagra will not increase your sex drive.
Viagra is not for use in women.
This medicine is available only with a doctor's prescription.
Before you take Viagra
YOU MUST NOT TAKE VIAGRA IF YOU ARE TAKING ANY NITRATE MEDICATION. 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
When you must not take it
Do not take Viagra if:
you are being treated for angina (chest pain) or other heart conditions with certain medicines called nitrates.
Nitrate medicines include glyceryl trinitrate (also called nitroglycerin). Common tradenames include tablets; such as Anginine,
Lycinate and Nitrostat; patches such as Nitro-Dur, Transiderm-Nitro, Nitroderm TTS and Minitran; sprays such as Nitrolingual
and Glytrin and injections such as Gliceryl trinitrate concentrate.
Common tradenames for other nitrate preparations include tablets such as Imdur Durules, Monodur durules, Sorbidin, Isordil,
Corangin, ISMO 20, Imtrate, Duride, Isomonit, Ikorel and Sodium Nitroprusside.
There may be other tradenames not listed here.
you are using amyl nitrite
you have heart or blood vessel problems that make sexual intercourse inadvisable
you have suffered a heart attack or stroke in the last 6 months
you have severe liver problems
your blood pressure is unusually high or low or is not effectively treated
you have loss of vision in one or both eyes from an eye disease called non-arteritic anterior ischaemic optic neuropathy (NAION)
you have an eye disease called retinitis pigmentosa
you have an allergy to:
Viagra or similar medicines
any of the ingredients listed at the end of this leaflet
An allergic reaction can include:
hives, itching or skin rash
swelling of the face, lips or tongue which may lead to difficulty swallowing or breathing.
the packaging is torn or shows signs of tampering, or does not look quite right even if the tablets may look alright
the expiry date on the pack has passed.
If it has expired or is damaged, return it to your pharmacist for disposal.
Before you start to take it
Tell your doctor if:
You have any allergies to any other medicines or any other substances such as foods, preservatives or dyes.
You have any other heart or blood vessel problems.
You have previously had sudden loss of eyesight in one or both eyes.
You have any of the following medical conditions:
diabetes, especially if you also have eye problems
kidney or liver problems
leukaemia (cancer of the blood cells)
multiple myeloma (a cancer of the bone marrow)
any disease or deformity of your penis
any bleeding disorder such as haemophilia
a disease of the blood called sickle cell anaemia
colour vision problems
previously experienced sudden decrease or loss of hearing.
You are receiving any other treatment for impotence.
You have any other medical conditions.
If you have not told your doctor or pharmacist about any of the above, tell them before you start taking Viagra.
Taking other medicines
Tell your doctor or pharmacist if you are taking any other medicines, including medicines you buy without a prescription from
a pharmacy, supermarket or health food shop.
Do not take Viagra if you are using nitrate medicines for angina.
Some medicines and Viagra may interfere with each other. These include:
cimetidine, a medicine used to treat ulcers
some medicines used to treat fungal infections including ketoconazole and itraconazole
some antibiotics including erythromycin and rifampicin
some protease inhibitors such as ritonavir and saquinavir for the treatment of HIV infection
medicines called alpha-blockers. These are used treat high blood pressure or prostate problems.
You may need different amounts of your medicine or you may need to take different medicines. Your doctor or pharmacist can
tell you what to do if you are taking any of these medicines. They also have a more complete list of medicines to be careful
with or avoid while taking Viagra.
Ask your doctor or pharmacist, if you are not sure if you are taking any of these medicines.
How to take Viagra
Take Viagra exactly as your doctor has prescribed.
Follow all directions given to you by your doctor and pharmacist carefully.
They may differ from the information contained in this leaflet.
If you do not understand the instructions on the pack, ask your doctor or pharmacist for help.
How much to take
Your doctor will decide the correct dose for you depending on your condition and response.
This can be one 25 mg tablet a day or one 50 mg tablet a day or one 100 mg tablet a day.
Do not take more than one dose of Viagra a day.
When to take it
Take your dose of Viagra about one hour before you intend to have sex.
Viagra Tablets 25 mg, 50 mg or 100 mg
Swallow the tablet whole with a full glass of water.
The amount of time Viagra takes to start working varies from person to person, but it normally takes between half an hour
and one hour.
You may find Viagra takes longer to work if you take it with a heavy meal.
Viagra will work only if you are sexually excited.
If you take too much (Overdose)
If you take too much, you are more likely to experience side effects.
Immediately telephone your doctor or Poisons Information Centre (telephone in Australia 13 11 26; in New Zealand 0800 POISON
or 0800 764 766) for advice if you think that you or anyone else may have taken too much Viagra. Do this even if there are
no signs of discomfort.
While you are taking it
Things you must do
Stop taking Viagra if you have a loss of eyesight in one or both eyes, experienced loss of hearing or have an erection that
persists more than 4 hours. Seek medical attention urgently.
If Viagra does not help you get an erection or if your erection does not last long enough to complete sexual intercourse,
tell your doctor.
In these cases, your doctor may decide that you need a higher dose.
If you are about to start taking any new medicines, especially nitrates, tell your doctor and pharmacist that you are taking
See "Before you take Viagra" for a list of common nitrate medications.
Tell any other doctors, dentists and pharmacists who are treating you that you are taking Viagra.
Things you must not do
Do not use the drug amyl nitrite (sometimes called "poppers") while you are taking Viagra.
If you get an angina attack do not take nitrate medicines to relieve the pain but tell your doctor immediately. Make sure
your doctor knows you are taking Viagra
Do not give Viagra to anyone else, even if they have the same condition as you.
Things to be careful of
Be careful drinking alcohol while taking Viagra.
Drinking alcohol can temporarily impair the ability to get an erection.
Do not drink large amounts of alcohol before sexual activity.
If you experience changes in vision, or dizziness, when taking Viagra, you should not drive or operate machinery.
Tell your doctor or pharmacist as soon as possible if you do not feel well while you are taking Viagra.
While Viagra helps most people it can cause some unwanted side effects in a few people. All medicines have side effects.
If unwanted effects occur, most are likely to be minor and temporary. However, some may be serious and need medical attention.
Do not be alarmed by this list of possible side effects.
You may not get any of them.
Tell your doctor or pharmacist if you notice any of the following and they worry you:
Tell your doctor as soon as possible if you notice any of the following:
unusual heart beat
urinary tract infection (stinging or burning urine, more frequent need to pass urine)
blood in the urine
persistent headache or fainting
bleeding from the nose.
If any of the following happen, tell your doctor immediately or go to Accident and Emergency at your nearest hospital:
signs of allergy such as shortness of breath, wheezing or difficulty breathing; swelling of the face, lips, tongue or other
sudden decrease or loss of hearing
seizures, fits or convulsions
very rarely your erection may persist for longer than usual. If your erection continues for four hours, or sooner if there
is pain, you should seek medical attention urgently
rarely men have lost eyesight some time after taking drugs to treat erectile dysfunction (known as impotence). If you lose
eyesight in one or more eyes or experience changes in vision such as blurring, a blue colour to your vision or a greater awareness
of light, seek medical attention urgently.
This is not a complete list of all possible side effects. Others may occur in some people and there may be side effects not
If you notice any other symptoms that worry you, check with your doctor.
Ask your doctor or pharmacist if you don't understand anything in this list.
After taking Viagra
Keep this medicine where children cannot reach it.
A locked cupboard at least one-and-a-half metres above the ground is a good place to store medicines.
Keep Viagra in a cool; dry place where the temperature stays below 30°C. Do not store it or any other medicine in the bathroom
or near a sink.
Do not leave it in the car or on windowsills.
Heat and dampness can destroy some medicines.
Keep the tablets in their pack until it is time to take them. If you take your tablets out of the pack they will not keep
If your doctor tells you to stop taking Viagra, or the tablets have passed their expiry date, ask your pharmacist what to
do with any left over.
What it looks like
Viagra tablets are available in three strengths:
Viagra 25 mg - blue, rounded-diamond shaped tablets marked VGR 25 on one side and PFIZER on the other
Viagra 50 mg - blue, rounded-diamond shaped tablets marked VGR 50 on one side and PFIZER on the other
Viagra 100 mg - blue, rounded-diamond shaped tablets marked VGR 100 on one side and PFIZER on the other.
All strengths come in a box of 4 tablets. The 100 mg strength also comes in a box of 12 tablets.
Viagra tablets contain:
Viagra 25 mg - sildenafil (as citrate) 25 mg
Viagra 50 mg - sildenafil (as citrate) 50 mg
Viagra 100 mg - sildenafil (as citrate) 100 mg.
calcium hydrogen phosphate anhydrous
indigo carmine aluminium lake
Viagra is supplied in Australia by:
Pfizer Australia Pty Ltd
ABN 50 008 422 348
38-42 Wharf Road
West Ryde NSW 2114
Toll Free number: 1800 675 229.
Viagra is supplied in New Zealand by:
Pfizer New Zealand Ltd
PO Box 3998
Auckland, New Zealand.
Toll Free number: 0800 736 363.
Australian Registration Numbers
25 mg - AUST R 64434
50 mg - AUST R 64435
100 mg - AUST R 64436.
This leaflet was prepared in May 2013.
© Pfizer Australia Pty Ltd 2013.