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Uses of this medical product
Zenegra (sildenafil Citrate) relaxes muscles and increases blood flow to particular areas of the body. Sildenafil citrate is a phosphodiesterase type 5 (PDE5) inhibitor. It works by helping to increase blood flow into the penis during sexual stimulation. This helps you to achieve and maintain an erection. Zenegra is used to treat erectile dysfunction (impotence) in men.
How to take this drug?
Use Zenegra as directed by your doctor. Check the label on the medicine for exact dosing instructions. An extra patient leaflet is available with sildenafil. Talk to your pharmacist if you have questions about this information.
Take sildenafil by mouth with or without food. Sildenafil may not work as quickly if you take it with a high-fat meal. Sildenafil is usually taken about 1 hour before sexual activity; however, it may be taken anywhere from 4 hours to a half hour before sexual activity. Talk with your doctor about the best way to take sildenafil.
Do NOT take more than the recommended dose or take it more often than once daily, or as directed by your doctor. If you miss a dose of sildenafil and you still intend to engage in sexual activity, take it as soon as you remember. Continue to take it as directed by your doctor.
Side effects of this rx medication
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:
Diarrhea; dizziness; flushing; headache; heartburn; stuffy nose; upset stomach.
Seek medical attention right away if any of these SEVERE side effects occur:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); chest pain; fainting; fast or irregular heartbeat; memory loss; numbness of an arm or leg; one-sided weakness; painful or prolonged erection; ringing in the ears; seizure; severe or persistent dizziness; severe or persistent vision changes; 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.
Some medical conditions may interact with sildenafil. 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 deformed penis (eg, cavernosal fibrosis, Peyronie disease), blood cell problems (eg, leukemia, multiple myeloma, sickle cell anemia), or any other condition that may increase the risk of a prolonged erection (priapism)
if you have a history of a prolonged (more than 4 hours) 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 have a history of liver or kidney problems, lung problems (eg, pulmonary veno-occlusive disease), high or low blood pressure, ulcers, bleeding problems, heart problems (eg, angina, aortic stenosis, heart failure, irregular heartbeat), or blood vessel problems
if you have a history of heart attack, stroke, or life-threatening irregular heartbeat, especially within the past 6 months
Some MEDICINES MAY INTERACT with sildenafil. 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, lightheadedness, and fainting may occur
Azole antifungals (eg, itraconazole, ketoconazole), H2 antagonists (eg, cimetidine), HIV protease inhibitors (eg, ritonavir, saquinavir), macrolide antibiotics (eg, erythromycin), narcotic analgesics (eg, dihydrocodeine), or telithromycin because they may increase the risk of sildenafil's side effects
Bosentan or rifampin because they may decrease sildenafil's effectiveness
This may not be a complete list of all interactions that may occur. Ask your health care provider if sildenafil 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.
Do NOT use sildenafil if:
you are allergic to any ingredient in sildenafil
you have been advised by your doctor to avoid sexual activity because of heart problems
you are taking nitrates (eg, isosorbide, nitroglycerin) in any form (eg, tablet, capsule, patch, ointment), or nitroprusside
you use certain recreational drugs called "poppers" (eg, amyl nitrate or nitrite, butyl nitrate or nitrite)
you take another PDE5 inhibitor (eg, tadalafil, vardenafil) or another medicine that contains sildenafil
Contact your doctor or health care provider right away if any of these apply to you.
What happens if I miss dose the of this medicine?
If you miss a dose of sildenafil and you still intend to engage in sexual activity, take it as soon as you remember. Continue to take it as directed by your doctor.
Storage of this prescription medicine
Store sildenafil at 77 degrees F (25 degrees C). Brief storage at temperatures between 59 and 86 degrees F (15 and 30 degrees C) is permitted. Store away from heat, moisture, and light. Do not store in the bathroom. Keep sildenafil out of the reach of children and away from pets.
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