This product was added to our catalog on Tuesday 21 February, 2017.
What is Viagra?
Sildenafil relaxes muscles and increases blood flow to particular areas of the body.
Sildenafil under the name Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women.
Do not take Viagra while also taking Revatio, unless your doctor tells you to.
Sildenafil may also be used for purposes not listed in this medication guide.
Important information about Viagra
Do not take sildenafil 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 drugs such as amyl nitrate or nitrite ("poppers"). Taking sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure.
During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away. You could be having a serious side effect of sildenafil.
Do not take sildenafil more than once a day. Allow 24 hours to pass between doses.
Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection (priapism) can damage the penis.
Sildenafil can decrease blood flow to the optic nerve of the eye, causing sudden vision loss. This has occurred in a small number of people taking sildenafil, most of whom also had 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. It is not clear whether sildenafil is the actual cause of vision loss.
Viagra (Sildenafil) Interactions
See also How to Use section. Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not starts, stop, or change the dosage of any medicines without your doctor's approval. Some products that may interact with this drug include:
certain recreational drugs ("poppers") containing amyl/butyl nitrite, alpha blocker medication (such as doxazosin, prazosin, terazosin), bosentan.Other medications can affect the removal of sildenafil from your body, which may affect how sildenafil works. Examples include cimetidine, anticonvulsants (such as carbamazepine, phenobarbital, phenytoin), azole antifungals (such as ketoconazole, itraconazole), macrolide antibiotics (such as erythromycin), rifamycins (such as rifabutin), HIV drugs (such as ritonavir, saquinavir, delavirdine), St. John's wort, among others.Sildenafil may interact with certain chest pain medications (nitrates such as nitroglycerin, isosorbide) causing a dangerous drop in blood pressure. Do not take sildenafil if you also use nitrates. Talk with your doctor or pharmacist for more details and for information on what to do if you get unusual chest pain.Do not take this medication with any other product that contains sildenafil or other similar medications for erection problems/pulmonary hypertension (such as tadalafil, vardenafil).
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.
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 angulations, 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.
Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction) by blocking a certain enzyme (phosphodiesterase-PDE5) in the body. In combination with sexual stimulation, sildenafil works by helping the blood flow into the penis to achieve and maintain an erection.This drug does not protect against sexually transmitted diseases (such as HIV, hepatitis B, gonorrhea, syphilis). Practice "safe sex" such as using latex condoms. Consult your doctor or pharmacist for more details. OTHER This section contains uses of this drug that are not listed in the approved professional labeling for the drug but that may be prescribed by your health care professional. Use this drug for a condition that is listed in this section only if it has been so prescribed by your health care professional.Sildenafil is also available in other strengths for treating high blood pressure in the lungs (pulmonary arterial hypertension). Do not substitute one form of this drug for the other.
HOW TO USE:
Read the Patient Information Leaflet provided by your pharmacist before you start taking sildenafil and each time you get a refill. If you have any questions, consult your doctor or pharmacist. To treat erectile dysfunction, take this drug by mouth as directed by your doctor, usually as needed. Take sildenafil at least 30 minutes, but no more than 4 hours, before sexual activity (1 hour before is the most effective). Do not take more than once daily. A high-fat meal may delay how quickly the drug begins to work. Avoid eating grapefruit or drinking grapefruit juice while you are being treated with this medication unless your doctor instructs you otherwise. The dosage is based on your medical condition, response to treatment, and other medications you may be taking (see also Drug Interactions section). Consult your doctor or pharmacist for more details.
If overdose is suspected, contact a poison control center or emergency room immediately. US residents can call the US National Poison Hotline at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include severe dizziness, fainting, and painful/prolonged erection.
Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.