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 to 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.
How to Use 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 on this website.
If you do not understand the instructions on the pack, ask your doctor or pharmacist to help.
How Much Viagra to Take
Your doctor will decide the correct dose for you depending on your condition and response. This can be one 25mg tablet a day or one 50mg tablet a day or one 100mg 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. 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 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 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.
Viagra Side Effects
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:
- headache, dizziness
- flushing
- indigestion
- nasal congestion
- diarrhoea
- rash
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
- changes in vision such as blurring, a blue colour to your vision or a greater awareness of light
- 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 parts
- chest pain
- 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 medicall attention urgently.
- Rarely men have lost eyesight some time after taking drugs to treat erectile dysfunction (known s impotence). It is not known at this time if Viagra causes this. If you lose eyesight in one or more eyes, 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 yet known.
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.