Generic Name: sildenafil (sil-DEN-a-fil)
Brand Name: Revatio
Sildenafil tablets are used for:
Treating high blood pressure in the lungs (pulmonary arterial hypertension [PAH]). It may also be used for other conditions as determined by your doctor.
Sildenafil tablets are a phosphodiesterase type 5 (PDE5) inhibitor. It works by relaxing and dilating the blood vessels in the lungs. This lowers the blood pressure in the lungs and helps to improve your ability to exercise.
Do NOT use sildenafil tablets if:
- you are allergic to any ingredient in sildenafil tablets
- you have pulmonary veno-occlusive disease (PVOD)
- you are taking nitrates (eg, isosorbide, nitroglycerin) in any form (eg, tablet, capsule, spray, patch, ointment) or nitroprusside
- you take another medicine that contains sildenafil, another PDE5 inhibitor (eg, tadalafil, vardenafil), or ritonavir
- you use certain recreational drugs called "poppers" (eg, amyl nitrate or nitrite, butyl nitrate or nitrite)
Contact your doctor or health care provider right away if any of these apply to you.
Before using sildenafil tablets:
Some medical conditions may interact with sildenafil tablets. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:
- if you are pregnant, planning to become pregnant, or are breast-feeding
- if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
- if you have allergies to medicines, foods, or other substances
- if you have a history of a prolonged (more than 4 hours) or painful erection (priapism)
- if you have a deformed penis (eg, cavernosal fibrosis, Peyronie disease), certain blood cell problems (eg, leukemia, multiple myeloma, sickle cell anemia), or any other condition that may increase the risk of a prolonged or painful erection (priapism)
- if you have a history of certain eye problems (eg, macular degeneration, optic neuropathy, retinitis pigmentosa, sudden vision loss in one or both eyes) or hearing problems (eg, ringing in the ears, decreased hearing, hearing loss)
- if you are dehydrated or have a history of liver or kidney problems, high or low blood pressure, stroke, ulcers, bleeding problems, heart problems (eg, aortic stenosis, angina, irregular heartbeat, heart attack, heart failure), blood vessel problems, or nervous system problems
- if you have pulmonary hypertension caused by sickle cell anemia
- if you are taking bosentan or medicine for erectile dysfunction (ED)
Some MEDICINES MAY INTERACT with sildenafil tablets. Tell your health care provider if you are taking any other medicines, especially any of the following:
- Alpha-blockers (eg, doxazosin), medicines for high blood pressure, nitrates (eg, isosorbide, nitroglycerin), or nitroprusside because severe low blood pressure with dizziness, light-headedness, and fainting may occur
- Azole antifungals (eg, itraconazole, ketoconazole), H2 antagonists (eg, cimetidine), HIV protease inhibitors (eg, ritonavir, saquinavir), macrolide antibiotics (eg, erythromycin), or telithromycin because they may increase the risk of sildenafil tablets's side effects
- Barbiturates (eg, phenobarbital), bosentan, carbamazepine, efavirenz, nevirapine, phenytoin, rifabutin, or rifampin because they may decrease sildenafil tablets's effectiveness
This may not be a complete list of all interactions that may occur. Ask your health care provider if sildenafil tablets may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.
How to use sildenafil tablets:
Use sildenafil tablets as directed by your doctor. Check the label on the medicine for exact dosing instructions.
- An extra patient leaflet is available with sildenafil tablets. Talk to your pharmacist if you have questions about this information.
- Take sildenafil tablets by mouth with or without food. Take your doses 4 to 6 hours apart unless your doctor tells you otherwise.
- Take sildenafil tablets on a regular schedule to get the most benefit from it. Take it at the same times each day.
- Continue to take sildenafil tablets even if you feel well. Do not miss any doses.
- Do not suddenly stop taking sildenafil tablets or change your dose without talking to your doctor.
- If you miss a dose of sildenafil tablets, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.
Ask your health care provider any questions you may have about how to use sildenafil tablets.
Important safety information:
- Sildenafil tablets may cause drowsiness, dizziness, fainting, or blurred vision. These effects may be worse if you take it with alcohol or certain medicines. Take sildenafil tablets with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.
- Sildenafil tablets may cause dizziness, light-headedness, or fainting; alcohol, hot weather, exercise, or fever may increase these effects. To prevent them, sit up or stand slowly, especially in the morning. Sit or lie down at the first sign of any of these effects.
- Patients with heart problems who take sildenafil tablets may be at increased risk of heart-related side effects, including a heart attack or stroke. Symptoms of a heart attack may include chest, shoulder, neck, or jaw pain; numbness of an arm or leg; severe dizziness, headache, nausea, stomach pain, or vomiting; fainting; or vision changes. Symptoms of a stroke may include confusion, vision or speech changes, one-sided weakness, or fainting. Contact your doctor or seek medical attention right away if you experience these symptoms.
- Sildenafil tablets may rarely cause a prolonged (more than 4 hours) or painful erection. This could happen even when you are not having sex. If this is not treated right away, it could lead to permanent sexual problems, such as impotence. Contact your doctor right away if you have an erection that lasts more than 4 hours.
- If vomiting or diarrhea occurs, you will need to take care not to become dehydrated. Contact your doctor for instructions.
- Sildenafil tablets may uncommonly cause mild, temporary vision changes (eg, blurred vision, sensitivity to light, blue/green color tint to vision). Contact your doctor if vision changes persist or are severe.
- Rarely, an eye problem called nonarteritic anterior ischemic optic neuropathy (NAION) has been reported in patients who took sildenafil tablets. This may lead to decreased vision or a permanent loss of vision in some cases. If you notice a sudden decrease in vision or loss of vision in one or both eyes, contact your doctor right away.
- Sudden decreases in hearing and loss of hearing have been reported in some patients who have taken sildenafil tablets. Sometimes they also noticed ringing in the ears or dizziness. If you notice a sudden decrease or loss of hearing, contact your doctor right away.
- Tell your doctor or dentist that you take sildenafil tablets before you receive any medical or dental care, emergency care, or surgery.
- Do not use medicines or treatments for ED while you are taking sildenafil tablets without first checking with your doctor.
- Use sildenafil tablets with caution in the ELDERLY; they may be more sensitive to its effects.
- Sildenafil tablets are not approved for use in children. An increase in death has been seen in children as the dose of sildenafil tablets gets higher. However, your child's doctor may decide the benefits of taking sildenafil tablets may outweigh the risks. Talk with the doctor if you have questions about giving sildenafil tablets to your child.
- PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of taking sildenafil tablets while you are pregnant. It is not known if this medicine is found in breast milk. If you are or will be breast-feeding while you take sildenafil tablets, check with your doctor. Discuss any possible risks to your baby.
Possible side effects of sildenafil tablets:
All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:
Seek medical attention right away if any of these SEVERE side effects occur:
Diarrhea; dizziness; flushing; headache; muscle aches; nausea; nosebleed; sore throat; stuffy or runny nose; trouble sleeping; upset stomach; vomiting.
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); burning, numbness, or tingling; chest pain; confusion; fainting; fast or irregular heartbeat; fever; memory loss; numbness of an arm or leg; one-sided weakness; painful or prolonged erection; ringing in the ears; seizure; severe or persistent dizziness or nosebleed; severe or persistent vision changes; shortness of breath; speech problems; sudden decrease or loss of hearing; sudden decrease or loss of vision in one or both eyes.
This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.
If OVERDOSE is suspected:
Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center, or emergency room immediately.Proper storage of sildenafil tablets:
Store sildenafil tablets at room temperature, between 68 and 77 degrees F (20 and 25 degrees C). Store away from heat, moisture, and light. Do not store in the bathroom. Keep sildenafil tablets out of the reach of children and away from pets.
- If you have any questions about sildenafil tablets, please talk with your doctor, pharmacist, or other health care provider.
- Sildenafil tablets are to be used only by the patient for whom it is prescribed. Do not share it with other people.
- If your symptoms do not improve or if they become worse, check with your doctor.
- Check with your pharmacist about how to dispose of unused medicine.
This information should not be used to decide whether or not to take sildenafil tablets or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about sildenafil tablets. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to sildenafil tablets. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using sildenafil tablets.
Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using this medicine.
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