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SIDE EFFECTS: Dizziness, lightheadedness, headache, flushing, heartburn, nosebleeds, trouble sleeping, or swollen hands/ankles/feet (edema) may occur. Vision changes such as increased sensitivity to light, blurred vision, or trouble telling blue and green colors apart may also occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.

To minimize dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Rarely, a sudden loss of eyesight in one or both eyes (NAION) may occur. This may or may not be due to sildenafil. Stop taking sildenafil and get medical help right away if this occurs. You have a slightly greater chance of developing this serious eye problem if you have heart disease, diabetes, high cholesterol, certain other eye problems ("crowded disk"), or high blood pressure, or if you smoke or are over 50.

Sexual activity may put extra strain on your heart, especially if you have heart problems. If you have heart problems and experience any of these serious side effects while having sex, stop taking sildenafil and get medical help right away: severe dizziness, fainting, chest/jaw/left arm pain, nausea.

In the unlikely event you have a painful or prolonged erection lasting 4 or more hours, stop using this drug and get medical help right away or permanent problems could occur.

Rarely, sildenafil may cause sudden hearing problems (such as decrease/loss of hearing in one or both ears, ringing in the ears). Stop taking sildenafil and get medical help right away if these effects occur.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Read the Viagra (sildenafil citrate) Side Effects Center for a complete guide to possible side effects

PRECAUTIONS: Before taking sildenafil, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: sickle cell disease, high or low blood pressure, a severe loss of body water (dehydration), history of painful/prolonged erection (priapism), eye problems (such as decreased vision in one or both eyes, retinitis pigmentosa), heart problems (such as heart attack or irregular heartbeat in the past 6 months, heart failure, chest pain/angina, aortic stenosis, idiopathic hypertrophic subaortic stenosis), kidney disease, liver disease, fluid in the lungs (pulmonary edema), problem with shape of penis (such as angulation, fibrosis/scarring, Peyronie's disease), stroke in the past 6 months.

This drug may make you dizzy or cause vision problems. Do not drive, use machinery, or do any activity that requires alertness or clear vision until you are sure you can perform such activities safely. Limit alcoholic beverages.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

Caution is advised when using this drug in the elderly because they may be more sensitive to the effects of this drug. Your doctor may start you on a lower dose.

This brand of the drug is usually not used in women. During pregnancy, sildenafil should be used only when clearly needed. Discuss the risks and benefits with your doctor.

It is unknown if this medication passes into breast milk. Consult your doctor before breast-feeding.

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Viagra - User Reviews

Viagra User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Viagra sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration

 

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.



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