What should I watch for while using this medicine?
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If you notice any changes in your vision while taking this drug, call your doctor or health care professional as soon as possible. Viagra Cialis. Stop using this medicine and call your health care provider right away if you have a loss of sight in one or both eyes. Contact you doctor or health care professional right away if the erection lasts longer than 4 hours or if it becomes painful. This may be a sign of serious problem and must be treated right away to prevent permanent damage. If you experience symptoms of nausea, dizziness, chest pain or arm pain upon initiation of sexual activity after taking this medicine, you should refrain from further activity and call your doctor or health care professional as soon as possible. Do not drink alcohol to excess (examples, 5 glasses of wine or 5 shots of whiskey) when taking this medicine. When taken in excess, alcohol can increase your chances of getting a headache or getting dizzy, increasing your heart rate or lowering your blood pressure.
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Using this medicine does not protect you or your partner against HIV infection (the virus that causes AIDS) or other sexually transmitted diseases.

They need to know if you have any of these conditions:

* eye or vision problems, including a rare inherited eye disease called retinitis pigmentosa
* heart disease, angina, high or low blood pressure, a history of heart attack, or other heart problems
* kidney disease
* liver disease
* Viagra Cialis Levitra
* stroke
* an unusual or allergic reaction to sildenafil, other medicines, foods, dyes, or preservatives
* pregnant or trying to get pregnant
* breast-feeding
What may interact with this medicine?

Do not take this medicine with any of the following:

* cisapride
* methscopolamine nitrate
* nitrates like amyl nitrite, isosorbide dinitrate, isosorbide mononitrate, nitroglycerin
* nitroprusside
* other sildenafil products (Revatio)

This medicine may also interact with the following:

* certain drugs for high blood pressure
* generic viagra
* certain drugs for the treatment of HIV infection or AIDS
* certain drugs used for fungal or yeast infections, like fluconazole, itraconazole, ketoconazole, and voriconazole
* cimetidine
* erythromycin
* rifampin

Order Viagra. This list may not describe all possible interactions. Give your health care providers a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

Clinical use

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