Common uses

Viagra Brand is a phosphodiesterase inhibitor used to treat sexual function problems such as impotence or erectile dysfunction. In combination with sexual stimulation, Viagra Brand works by helping the blood flow into the penis to achieve and maintain an erection. Viagra Brand is not intended for use in women or children. Viagra Brand will not protect against sexually transmitted diseases including HIV infection. Use 'safe sex' practices such as latex condoms.

Before using

Do not take his medicine if you are also taking or using nitroglycerin, (e.g., tablet, patch, or ointment dose forms) or other nitrates (e.g., isosorbide), nitroprusside (or any 'nitric oxide donor' medicine), or recreational drugs called 'poppers' containing amyl or butyl nitrate because very serious interactions may occur. If you are not sure whether a certain medicine is a nitrate, contact your doctor or pharmacist. If you are currently using any of these medicines, tell your doctor or pharmacist before using sildenafil.

Additional monitoring of your dose or condition may be needed if you are taking other medicines for impotence, azole antifungals (e.g., itraconazole, ketoconazole), cimetidine, erythromycin, mibefradil, rifamycins (e.g., rifampin), high blood pressure medicines, or delavirdine. If you are taking an HIV protease inhibitor (e.g., ritonavir, saquinavir), do not take more than a 25 mg dose of sildenafil in a 48-hour period. If you are taking more than a 25 mg dose of sildenafil and are also taking an alpha-blocker medicine (e.g., doxazosin, prazosin, terazosin) for various conditions (e.g., enlarged prostate), separate the time between taking these medicines by more than 4 hours. See How To Use section for drug-food interaction information.

Do not start or stop any medicine without doctor or pharmacist approval. Inform your doctor of any other medical conditions including penis conditions (e.g., angulation, fibrosis/scarring, Peyronie's disease), history of painful/prolonged erection (priapism), sickle cell anemia, blood system cancers (e.g., leukemia or myeloma), eye problems (e.g., retina diseases like retinitis pigmentosa), kidney or liver disease, bleeding disorders, active stomach ulcers, heart problems (e.g., recent heart attack or serious arrhythmia within past 6 months, heart failure, coronary artery disease with unstable angina, aortic stenosis, idiopathic hypertrophic subaortic stenosis), recent stroke within past 6 months, very high or low blood pressure, or allergies.

Directions

Take Viagra Brand by mouth as needed between four hours and one-half hour before sexual activity (about 1 hour before is most effective); or take as directed by your doctor. Do not take Viagra Brand more often than once daily as needed. A high fat meal may delay the time of onset of Viagra Brand.

Avoid eating grapefruit or drinking grapefruin juice while being treated with Viagra Brand unless your doctor instructs you otherwise. Your dosage is based on your medical condition, your response to therapy, and other medicines you are taking (see also Before Using section).

Store Viagra Brand at room temperature 77 degrees F (25 degrees C) in a tightly-closed container, away from heat, moisture, and light. Brief storage between 59 and 86 degrees F (15 and 30 degrees C) is permitted.

Cautions

Do not take Viagra Brand if you have had an allergic reaction to it or are allergic to any ingredient in this product. Viagra Brand may rarely cause dizziness or vision changes. Do not drive, operate machinery, or do anythind else that could be dangerous until you know how you react to Viagra Brand. Using Viagra Brand alone, with other medicines, or with alcohol may lessen your ability to drive or to perform other potentially dangerous tasks. To minimize dizziness or lightheadness, sit up or stand slowly when rising from a seated or lying position. Alcohol may increase your risk for side effects, including headache, dizziness, or lightheadedness. Avoid excessive amounts of alcohol when using Viagra Brand.

Do not exceed the recommended doze without checking with your doctor. Rarely, Viagra Brand may change heart rhythm, especially if taken with other medicines that can change the heart rhythm. This change in heart rhythm can result in serious, rarely fatal, irregular heartbeats. Ask your doctor for more information and if you should stop taking any of your other medicines to reduce the risk of this side effect.

Caution is advised when using Viagra Brand in the eldery because they may be more sensitive to the side effects of Viagra Brand. Viagra Brand should not be used in women or children.

Do not take Viagra Brand if you have had an allergic reaction to it in the past or to any other ingredient that is found in it.

Viagra Brand may cause dizziness or vision changes. Do not drive, operate machinery, or do anything else that could be dangerous until you know how you react to Viagra Brand. Using Viagra Brand alone, with other medicines, or with alcohol may lessen your ability to drive or to perform other potentially dangerous tasks. To minimize dizziness or lightheadedness, sit up or stand slowly when rising from a seated or lying position.

Your dose is based on your medical condition, response to therapy, and the other medicines you are taking. Do not exceed the recommended dose without checking with your doctor. Caution is advised when using Viagra Brand in the elderly because they may be more sensitive to the side effects of Viagra Brand. Viagra Brand should not be used in women or children.

Possible side effects

Side effects that may occur while taking Viagra Brand include headache, flushing, stomach upset, heartburn, nasal stuffiness, diarrhea, dizziness, or lightheadedness. Vision changes such as increased sensitivity to light, blurred vision, or impaired blue/green color discrimination may also occur. If these continue or are bothersome, check with your doctor or pharmacist.

Sexual activity may put extra strain on your heart, especially if you have heart problems, if you have heart problems and experience any serious side effects while having sex, stop having sex and tell your doctor immediately. These side effects include severe dizziness, fainting, chest pain, or nausea. In the unlikely event that you have a painful or prolonged erection (lasting more than 4 hours), stop using Viagra Brand and seek immediate medical attention or permanent problems could occur.

An allergic reaction to Viagra Brand is unlikely, but seek immediate medical attention if it occurs. Symptoms of an allergic reaction include rash, itching, unusual swelling, severe dizziness, or trouble breathing.

If you take too much

If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include severe dizziness, fainting, or prolonged erection.

Additional information

If your symptoms do not improve or if they become worse, check with your doctor. Do not share Viagra Brand with others for whom it was not prescribed, since they may have a problem that is not effectively treated with Viagra Brand, or they may have a condition that is complicated by Viagra Brand.

Do not use Viagra Brand for other health conditions. Keep Viagra Brand out of the reach of children and pets. If using Viagra Brand for an extended period of time, obtain refills before your supply runs out.

Drug interactions

Drug interactions can result in unwanted side effects or prevent a medicine from doing its job. Some medicines or medical conditions may interact with Viagra Brand. Inform your doctor or pharmacist of all prescription and over-the-counter medicine that you are taking.