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GENERIC NAME(S): SILDENAFIL CITRATE
Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction -ED). In combination with sexual stimulation, sildenafil works by increasing blood flow to the penis to help a man get and keep an erection.
OTHER USES: 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 brands and strengths for treating high blood pressure in the lungs (pulmonary hypertension ). Do not take this medication with any other product that contains sildenafil or other similar medications for erectile dysfunction -ED or pulmonary hypertension (such as tadalafil, vardenafil).
How to use Viagra
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, ask your doctor or pharmacist.
To treat erectile dysfunction -ED, 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.
The dosage is based on your medical condition, response to treatment, and other medications you may be taking. Be sure to tell your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
Tell your doctor if your condition does not improve.
Dizziness. headache. flushing, or stomach upset 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, tell your doctor or pharmacist promptly.
To reduce the risk of 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.
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 and get medical help right away: severe dizziness, fainting. chest/jaw/left arm pain, nausea .
Rarely, sudden decreased vision. including permanent blindness, in one or both eyes (NAION) may occur. If this serious problem occurs, stop taking sildenafil and get medical help right away. You have a slightly greater chance of developing NAION if you have heart disease. diabetes. high cholesterol. certain other eye problems (“crowded disk”), high blood pressure. if you are over 50, or if you smoke.
Rarely, a sudden decrease or loss of hearing, sometimes with ringing in the ears and dizziness, may occur. Stop taking sildenafil and get medical help right away if these effects occur.
In the rare 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.
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.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada – Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
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: heart problems (such as heart attack or life-threatening irregular heartbeat in the past 6 months, chest pain/angina, heart failure), stroke in the past 6 months, kidney disease, liver disease, high or low blood pressure. a severe loss of body water (dehydration), penis conditions (such as angulation, fibrosis/scarring, Peyronie’s disease ), history of painful/prolonged erection (priapism), conditions that may increase the risk of priapism (such as sickle cell anemia. leukemia, multiple myeloma ), eye problems (such as retinitis pigmentosa. sudden decreased vision, NAION).
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).
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.
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 start, stop, or change the dosage of any medicines without your doctor’s approval.
A product that may interact with this drug is: riociguat.
Sildenafil can cause a serious drop in your blood pressure when used with nitrates. A serious drop in blood pressure can lead to dizziness, fainting, and rarely heart attack or stroke. Do not use sildenafil with any of the following: certain drugs used to treat chest pain/angina (nitrates such as nitroglycerin, isosorbide), recreational drugs called “poppers” containing amyl nitrate, amyl nitrite, or butyl nitrite.
If you are also taking an alpha blocker medication (such as doxazosin, tamsulosin) to treat an enlarged prostate/BPH or high blood pressure, your blood pressure may get too low which can lead to dizziness or fainting. Your doctor may start treatment with a lower dose of sildenafil to minimize your risk of low blood pressure.
Other medications can affect the removal of sildenafil from your body, which may affect how sildenafil works. Examples include azole antifungals (such as itraconazole, ketoconazole), macrolide antibiotics (such as clarithromycin, erythromycin), HIV protease inhibitors (such as ritonavir, saquinavir), hepatitis C virus protease inhibitors (such as boceprevir, telaprevir), mifepristone, rifampin, among others.
Do not take this medication with any other product that contains sildenafil or other similar medications for erectile dysfunction-ED or pulmonary hypertension (such as tadalafil, vardenafil).
If overdose is suspected, contact a poison control center or emergency room right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include severe dizziness, fainting, painful/prolonged erection.
Do not share this medication with others.
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.
Information last revised October 2015. Copyright(c) 2015 First Databank, Inc.
Wireless Innovation Alliance // Jun. 16
Earlier today, Reps. Darrell Issa (R-CA) and Anna Eshoo (D-CA) sent the attached letter to FCC Chairman Tom Wheeler on the importance of establishing the technical rules necessary to allow unlicensed use of the 600 MHz band. The Wireless Innovation Alliance (WIA) released the statement below in response. More
Wireless Innovation Alliance // Apr. 17
The Wireless Innovation Alliance (WIA) released the statement below on todayвЂ™s FCC Open Meeting where the Commission approved an order to implement a spectrum sharing framework in the 3550-3700 MHz band. More
Wireless Internet Service Providers Association // 10:05 AM EST// Mar. 23
The National Association of Broadcasters (NAB) wants the FCC to declare an вЂњemergencyвЂќ and shut down the databases that let small businesses and others deliver broadband over vacant spectrum near television channels. More
Wireless Innovation Alliance // 6:06 PM EST// Feb. 10
The Wireless Innovation Alliance (WIA) released the statement below in response to the introduction of the House and Senate Wi-Fi Innovation Act More
Wireless Innovation Alliance // 4:44 PM EST// Jan. 28
The Wireless Innovation Alliance applauds the FCC for telling Marriott International, Inc. вЂ“ and everyone else вЂ“ that it is illegal to interfere with lawful communications. More
Wireless Innovation Alliance // 3:00 PM EST// Dec. 15
This October, the FCC found MarriottвЂ™s Gaylord Opryland Hotel and Convention Center to be guilty of blocking guestsвЂ™ personal Wi-Fi hotspots and fined Marriott International $600,000. Lend your social voice to our Thunderclap. More
Wireless Innovation Alliance // 5:47 PM EST// Sep. 4
FCC Chairman Tom Wheeler acknowledged the critical role unlicensed spectrum plays in growing competition in the broadband marketplace stating that the FCC’s “efforts to expand the amount of unlicensed spectrum creates alternative competitive pathways.” More
The Hill // 9:25 AM EST// Jun. 16
CEA released a report, Unlicensed Spectrum and the American Economy, examining the economic impact of unlicensed spectrum on the American economy. More
The Wireless Innovation Alliance (WIA) is a broad-based group of innovators, providers, consumer groups, think tanks and education organizations that believe that more efficient use and expanded access to the nationвЂ™s spectrum resources are fundamental to the future of U.S. economic policy and global competitiveness, and that we face potential spectrum scarcities in both licensed and unlicensed bands that must be addressed in order for innovation and investment to move forward.
Spectrum, and specifically, the most efficient and expansive use of this most valuable natural resource, is fundamental to the future of U.S. economic growth, and global competitiveness. United States spectrum policy must also be efficient and flexible as well, so that we can encourage and accommodate new and innovative ways to meet the growing demand for wireless services and applications, and the growing inability – in both licensed and unlicensed bands – to meet that demand.
What should I discuss with my healthcare provider before taking tadalafil (Cialis)?
You should not take tadalafil if you are allergic to it.
Tadalafil should not be used together with nitrate medication, such as nitroglycerin (Nitro Dur, Nitrolingual, Nitrostat, Transderm Nitro, and others), isosorbide dinitrate (Dilatrate, Isordil, Isochron), isosorbide mononitrate (Imdur, ISMO, Monoket), or recreational drugs such as amyl nitrate or nitrite (“poppers”). Taking tadalafil with a nitrate medicine for chest pain or heart problems can cause a sudden and serious decrease in blood pressure.
To make sure you can safely take tadalafil, tell your doctor if you have any of these other conditions:
- heart disease or heart rhythm problems;
- a recent heart attack (within the past 90 days);
- a recent history (in the past 6 months) of a stroke, or congestive heart failure;
- angina (chest pain), high or low blood pressure;
- liver disease;
- kidney disease (or if you are on dialysis);
- 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.
Tadalafil 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 tadalafil, 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 tadalafil is the actual cause of vision loss. Stop using tadalafil and get emergency medical help if you have sudden vision loss.
FDA pregnancy category B. Tadalafil is not expected to harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment with Adcirca.
It is not known whether tadalafil passes into breast milk or if it could harm a nursing baby. Do not use Adcirca without telling your doctor if you are breast-feeding a baby.
How should I take tadalafil (Cialis)?
Take exactly as prescribed by your doctor. Do not take in larger or smaller amounts or for longer than recommended. Follow the directions on your prescription label.
Tadalafil can be taken with or without food.
Do not break or split a Cialis tablet. Swallow it whole.
Cialis is usually taken only once per day. Follow your doctor’s instructions. For erectile dysfunction, take the medicine just before sexual activity but not more than once per day.
Cialis can help achieve an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Follow your doctor’s instructions.
Adcirca is usually taken once per day. Follow your doctor’s instructions. Do not take Cialis for erectile dysfunction if you are taking Adcirca for pulmonary arterial hypertension.
Do not take tadalafil more than once a day. Allow 24 hours to pass between doses. If you take the medication daily, take it at the same time each day.
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.
Store at room temperature away from moisture and heat.