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What is Viagra?



Viagra is the brand name for sildenafil citrate. The Viagra trademark is owned by Pfizer.

Viagra is a prescription medicine taken by mouth for the treatment of erectile dysfunction (ED) in men. ED is a condition where the penis does not harden and expand when a man is sexually excited, or when he cannot keep an erection. Viagra may help a man with ED get and keep an erection when he is sexually excited. Viagra must be used only under a doctor's care.

Viagra does not:

• cure ED
• increase a man's sexual desire
• protect a man or his partner from sexually transmitted diseases, including HIV. Speak to your healthcare professional about ways to guard against sexually transmitted diseases.
• serve as a male form of birth control

Viagra is only for men with ED. Viagra is not for women or children. Viagra must be used only under a healthcare professional's care.


Who Should Not Take Viagra?

Do not take Viagra if you:

• take any medicines called "nitrates"
• use recreational drugs called "poppers" like amyl nitrate and butyl nitrate
• have been told by your healthcare professional to not have sexual activity because of health problems

What are The Risks?

The following are the major possible risks and side effects of Viagra therapy. This list is not complete.

Viagra can cause your blood pressure to drop suddenly to an unsafe level if it is taken with certain other medicines such as nitrates and alpha-blockers, and recreational drugs that contain nitrates called "poppers". A sudden drop in your blood pressure could cause you to become dizzy, faint, or have a heart attack or stroke.

Tell all your healthcare professionals that you take Viagra. If you need emergency medical care for a heart problem, it will be important for your healthcare professionals to know when you last took Viagra.

Viagra may uncommonly cause:

• an erection that won't go away (priapism)
• vision changes, such as seeing a blue tinge to objects or having difficulty telling the difference between the colors blue and green

Some common side effects with Viagra include:

• headache
• flushing
• upset stomach
• stuffy or runny nose
• urinary tract infection
• diarrhea

What Should I Tell My Healthcare Professional?

Tell your healthcare professional if you:

• have or had heart problems
• have low blood pressure or have high blood pressure that is not controlled
• have had a stroke
• have liver problems
• have ever had severe vision loss
• have kidney problems or require dialysis
• have retinitis pigmentosa, a rare genetic (runs in families) eye disease
• have stomach ulcers
• have a bleeding problem
• have a deformed penis shape or Peyronie's disease
• have had an erection that lasted more than 4 hours
• have blood cell problems such as sickle cell anemia, multiple myeloma, or leukemia
• are taking a medicine called a protease inhibitor for the treatment of HIV
• are taking medicines called alpha blockers (alpha blockers are sometimes prescribed for prostate problems or high blood pressure)

Can Other Medicines or Food Affect Viagra?

Viagra and certain other medicines can interact with each other. Tell your healthcare professional about all the medicines you take including prescription and non-prescription medicines, vitamins, and herbal supplements. Know the medicines you take. Keep a list of them with you to show your healthcare professional.


Viagra FDA Approved 1998
Patient Information Sheet Revised 07/2005
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FDA ALERT [07/2005]: A small number of men have lost eyesight in one eye some time after taking Viagra, Cialis, or Levitra. This type of vision loss is called non-arteritic anterior ischemic optic neuropathy (NAION). NAION causes a sudden loss of eyesight because blood flow is blocked to the optic nerve.

We do not know at this time if Viagra, Cialis, or Levitra causes NAION. NAION also happens in men who do not take these medicines. People who have a higher chance for NAION include those who:

• have heart disease
• are over 50 years old
• have diabetes
• have high blood pressure
• have high cholesterol
• smoke
• have certain eye problems

FDA has approved new labels for Viagra, Cialis, and Levitra to include information on possible eyesight loss (NAION).

Stop using Viagra, Cialis, or Levitra if you have a loss in your eyesight. Get medical help right away.