Viagra (Sildenafil) general information
at 12:29 am on Wednesday, 5 December 2007
Viagra relaxes muscles within the penis. This allows increased blood flow into the penis, necessary to achieve and maintain an erection.
Viagra is used to treat erectile dysfunction (impotence).
Viagra may also be used for purposes other than those listed in this medication guide.
Special precautions
Before taking viagra, tell your doctor if you
-
have had a heart attack, stroke, or life-threatening irregular heartbeats within the last six months;
- have a history of heart failure;
- have coronary artery disease;
- have angina;
- have high or low blood pressure;
- have liver problems;
- have kidney problems;
- have ever had blood problems, including sickle cell anemia or leukemia;
- have a bleeding disorder;
- have a stomach ulcer;
- have retinitis pigmentosa (an inherited condition of the eye);
- have a physical deformity of the penis such as Peyronie’s disease;
- have a condition that could lead to prolonged and painful erections, such as a tumor of the bone marrow, sickle cell anemia, or leukemia; or
- are taking another medicine to treat impotence, such as alprostadil (Caverject, Muse, Edex) or yohimbine (Yocon, Yodoxin, others)
Although viagra is not indicated for use by women, it is in the FDA pregnancy category B. This means that viagra is not expected to be harmful to an unborn baby. Viagra should not be taken by women.
It is not known whether viagra passes into breast milk. Viagra should not be taken by women. If you are over 65 years of age, you may be more likely to experience side effects from viagra. Your doctor may prescribe a lower dose of this medication.
Side effects
If you experience any of the following serious side effects, stop taking viagra and seek emergency medical attention or notify your doctor immediately:
-
an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives);
- chest pain or an irregular heartbeat;
- swelling of the ankles or legs;shortness of breath;
- prolonged or severe dizziness;
- a prolonged (lasting longer than 4 hours) or painful erection; or
- dizziness, nausea, or angina (pain, tightness, discomfort, numbness, or tingling in the chest, arms, neck, or jaw)
Other, less serious side effects may be more likely to occur. Continue to take viagra and talk to your doctor if you experience
-
flushing;
- mild dizziness;
- headache;
- nasal congestion;
- diarrhea;
- temporary blue tint in vision or other vision abnormalities; or
- itching or a rash
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome. Keep all appointments with your doctor. Don’t let anyone else take your medicines.
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What should I discuss with my doctor before taking Viagra ( sildenafil citrate )?
at 12:31 am on Tuesday, 4 December 2007
- Do not take Viagra ( sildenafil citrate ) if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin (Nitrostat, Nitrolingual, Nitro-Dur, Nitro-Bid, and others), isosorbide dinitrate (Dilatrate-SR, Isordil, Sorbitrate), and isosorbide mononitrate (Imdur, ISMO, Monoket). Nitrates are also found in some recreational medicines such as amyl nitrate or nitrite (\”poppers\”). Taking Viagra ( sildenafil citrate ) with a nitrate medicine can cause a serious decrease in blood pressure, leading to fainting, stroke, or heart attack.
- A small number of patients have had a sudden loss of eyesight after taking Viagra ( sildenafil citrate ). This type of vision loss is caused by decreased blood flow to the optic nerve of the eye. It is not clear whether Viagra ( sildenafil citrate ) is the actual cause of such vision loss. Sudden vision loss with Viagra ( sildenafil citrate ) use has occurred most often in people with heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoke or are over 50 years old.
- Before taking Viagra ( sildenafil citrate ), tell your doctor if you have:
- heart disease or heart rhythm problems;
- a recent history (in the past 6 months) of a heart attack, stroke, or heart rhythm disorder;
- congestive heart failure;ww
- high or low blood pressure;
- coronary artery disease;
- liver disease;
- kidney disease;
- a blood cell disorder such as sickle cell anemia, multiple myeloma, or leukemia;
- a bleeding disorder such as hemophilia;
- a stomach ulcer;
- retinitis pigmentosa (an inherited condition of the eye);
- a physical deformity of the penis (such as Peyronie\’s disease); or
- if you have been told you should not have sexual intercourse for health reasons.
- If you have any of these conditions, you may not be able to use Viagra ( sildenafil citrate ) or you may need a dosage adjustment or special tests during treatment.
- FDA pregnancy category B: This medication is not expected to be harmful to an unborn baby. Do not use Viagra ( sildenafil citrate ) without telling your doctor if you are pregnant or plan to become pregnant during treatment.
- It is not known if Viagra ( sildenafil citrate ) passes into breast milk or if it could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.
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What are the possible side effects of Viagra ( sildenafil citrate )?
at 12:31 am on Monday, 3 December 2007
- If you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw during sexual activity, stop and call your doctor right away. You could be having a serious side effect of Viagra ( sildenafil citrate ).
- Stop using Viagra ( sildenafil citrate ) and get emergency medical help if you have sudden vision loss.
- Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
- Stop using Viagra ( sildenafil citrate ) and call your doctor at once if you have any of these serious side effects:
- chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, general ill feeling;
- irregular heartbeat;
- swelling in your hands, ankles, or feet;
- shortness of breath;
- vision changes;
- feeling light-headed, fainting; or
- penis erection that is painful or lasts 4 hours or longer.
- Continue taking Viagra ( sildenafil citrate ) and talk with your doctor if you have any of these less serious side effects:
- warmth or redness in your face, neck, or chest;
- stuffy nose;
- headache;
- upset stomach; or
- back pain.
- Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.
What drug(s) may interact with ?Do not take Viagra ( sildenafil citrate ) if you are taking the following medications:
- nitroglycerin-type medicines for the heart or chest pain such as amyl nitrite, isosorbide dinitrate, isosorbide mononitrate, nitroglycerin, even if these are only taken occasionally
Viagra ( sildenafil citrate ) may also interact with the following medications:
- alpha blockers, used for high blood pressure or an enlarged prostate. NOTE: Do not take doses of Viagra ( sildenafil citrate ) higher than 25 mg within 4 hours of taking alpha blockers, such as alfuzosin (UroXatral®), doxazosin (Cardura®), prazosin (Minipress®), or terazosin (Hytrin®).
- bosentan
- certain medicines used for seizures such as carbamazepine, phenytoin, and phenobarbital
- certain medicines used for fungal or yeast infections, such as fluconazole, ketoconazole, and voriconazole
- certain medicines for the treatment of HIV infection or AIDS
- cimetidine
- cisapride
- clarithromycin
- diltiazem
- erythromycin
- grapefruit juice
- mibefradil
- nitroprusside
- rifabutin
- rifampin
- quinidine
- some medicines for treating depression, anxiety or other mood problems (examples: fluoxetine, fluvoxamine, nefazodone)
- verapamil
Drug Uses
Viagra ( sildenafil citrate ) is used to treat impotence in men. Viagra ( sildenafil citrate ) increases the body’s ability to achieve and maintain an erection during sexual stimulation. Viagra ( sildenafil citrate ) does not protect you from getting sexually transmitted diseases, including HIV.
How Taken
Viagra ( sildenafil citrate ) comes as a tablet to take it orally. It should be taken as needed about 1 hour before sexual activity. However, Viagra ( sildenafil citrate ) can be taken anytime from 4 hours to 30 minutes before sexual activity. Viagra ( sildenafil citrate ) should not be taken more than once a day. Do not take more or less of it or take it more often than prescribed by your doctor.
Warnings/Precautions
Before taking Viagra ( sildenafil citrate ), tell your doctor if you have had a heart attack, stroke, or life-threatening irregular heartbeats within the last six months; have a history of heart failure; have coronary artery disease; have angina; have high or low blood pressure; have liver problems; have kidney problems; have ever had blood problems, including sickle cell anemia or leukemia; have a bleeding disorder; have a stomach ulcer; Viagra ( sildenafil citrate ) have retinitis pigmentosa (an inherited condition of the eye); have a physical deformity of the penis such as Peyronie’s disease; have a condition that could lead to prolonged erections, such as a tumor of the bone marrow, Viagra ( sildenafil citrate ) sickle cell anemia, or leukemia; or are taking another medicine to Viagra ( sildenafil citrate ) treat impotence. You may not be able to take Viagra ( sildenafil citrate ), or you may require a dosage adjustment or special monitoring during treatment if you have any of the conditions listed above. Although Viagra ( sildenafil citrate ) is not indicated for use by women, it is in the FDA pregnancy category B. This means that Viagra ( sildenafil citrate ) is not expected to be harmful to an unborn baby. Women should not take Viagra ( sildenafil citrate ). It is not known whether Viagra ( sildenafil citrate ) passes into breast milk. If you are over 75 years of age, you may be more likely to experience side effects from Viagra ( sildenafil citrate ). Your doctor may prescribe a lower dose of this medication.
Missed Dose
Viagra ( sildenafil citrate ) is used as needed, so you are not likely to miss a dose.
Possible Side Effects
Like all medicines, Viagra ( sildenafil citrate ) can cause some side effects. These effects are usually mild to moderate and usually don’t last longer than a few hours. Some of these side effects are more likely to occur with higher doses. The most common side effects of Viagra ( sildenafil citrate ) are headache, flushing of the face, and upset stomach. Less common side effects that may occur are temporary changes in color vision (such as trouble telling the difference between blue and green objects or having a blue color tinge to them), eyes being more sensitive to light, or blurred vision.Viagra ( sildenafil citrate ) In rare instances, men have reported an erection that lasts many hours. You should call a doctor immediately if you ever have an erection that lasts more than 4 hours. If not treated right away, permanent damage to your penis could occur. Heart attack, stroke, irregular heartbeats, and death have been reported rarely in men taking Viagra ( sildenafil citrate ). Most, but not all, of these men had heart problems before taking this medicine. It is not possible to determine whether these events were directly related to Viagra ( sildenafil citrate ).
Storage
Keep Viagra ( sildenafil citrate ) out of the reach of children. Keep Viagra ( sildenafil citrate ) in its original container. Store at 25°C (77°F); excursions permitted to 15-30°C (59-86°F).
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