What is the most important information I should know about sildenafil?
Sildenafil citrate, sold under the name Viagra is the first of a new group of medication which allows adequate sexual stimulation, relaxes the blood vessels of the penis and helps erection. Sildenafil tablet should be taken once a day. The time necessary for Sildenafil to exercise its action is about half an hour. The effect is maintained for about four hours. The effect is only obtained with a satisfactory sexual stimulation.
Sildenafil citrate relaxes muscles within the penis. This allows increased blood flow into the penis, necessary to achieve and maintain an erection.
Sildenafil is used to treat erectile dysfunction (impotence).
Sildenafil may also be used for purposes other than those listed in this medication guide.
How should I take sildenafil (Viagra)?
Sildenafil is usually taken when needed. It can be taken anywhere from 4 hours to one-half hour before sexual activity. Generally, it is taken 1 hour before sexual activity. The medication can help achieve an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Follow your doctor’s instructions. Taking sildenafil after eating a high-fat meal (such as a cheeseburger and french fries) may cause the medication to take a little longer to start working. Do not take sildenafil more than once a day.
Grapefruit and grapefruit juice may interact with sildenafil. The interaction could lead to potentially adverse effects. You should discuss the use of grapefruit and grapefruit juice with your doctor. Do not increase or decrease the amount of grapefruit products in your diet without first talking to your doctor.
If you develop dizziness, nausea, or angina (pain, tightness, discomfort, numbness, or tingling in the chest, arms, neck, or jaw) during sexual activity, refrain from further sexual activity and notify your doctor.
Contact your doctor or seek emergency medical attention for any erection that lasts longer than 4 hours.
Before taking sildenafil citrate (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 ever had blood problems, including sickle cell anemia or leukemia;
* have a bleeding disorder;
* have a stomach ulcer;
* have angina;
* have high or low blood pressure;
* have liver problems;
* have kidney problems;
* 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).
Do not take sildenafil if you are using a nitrate drug for chest pain or heart problems. Nitrates include nitroglycerin (Nitrostat, Nitrolingual, Nitro-Dur, Nitro-Bid, Minitran, Deponit, Transderm-Nitro, others), isosorbide dinitrate (Dilatrate-SR, Isordil, Sorbitrate), and isosorbide mononitrate (Imdur, ISMO, Monoket). Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite (”poppers”).
Although sildenafil is not indicated for use by women, it is in the FDA pregnancy category B. This means that sildenafil is not expected to be harmful to an unborn baby. Sildenafil should not be taken by women.
If you are over 60 years of age, you may be more likely to experience side effects from sildenafil. Your doctor may prescribe a lower dose of this medication!
What are the possible side effects of sildenafil?
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);
* swelling of the ankles or legs;
* prolonged or severe dizziness;
* chest pain or an irregular heartbeat;
* shortness of breath;
* a prolonged (lasting longer than 4 hours) or painful erection; or
* dizziness, nausea, or angina ( discomfort, numbness, pain, tightness, or tingling in the chest, arms, neck, or jaw).
Continue to take sildenafil and talk to your doctor if you experience
* flushing;
* nasal congestion;
* diarrhea;
* headache;
* mild dizziness;
* temporary blue tint in vision or other vision abnormalities; or
* itching or a rash.
Talk to your doctor about any side effect that seems unusual or that is especially bothersome.
Where can I get more information about Sildenafil?
Your pharmacist has additional information about sildenafil written for health professionals that you may read.
If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.
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