Description
USAGE
Follow the directions for using this medicine provided by your doctor. Viagra is to be taken 30 minutes to 1 hour before sexual activity. You may take it up to 4 hours before sexual activity. Viagra is not supposed to be taken more often than once per day.
MISSED DOSE
Viagra is to be used as necessary, so you are not supposed to take it according to a schedule. Viagra is not for regular use. Take it only before sexual activity
OVERDOSE
Seek emergency medical attention. Overdose symptoms may include chest pain, nausea, irregular heartbeat, and feeling light-headed or fainting.
WARNINGS
Do not exceed the recommended dose without checking with your doctor.
Do not take this medicine more than once a day.
Do not take this medicine if you take or use Nitroglycerin, including nitroglycerin tablets, patches, or ointment, or other Nitrates, such as isosorbide. If you are not sure whether a certain medicine is a nitrate, contact your doctor or pharmacist.
Use of this medicine will not prevent the spread of sexually transmitted diseases (STDs), including human immunodeficiency virus (HIV). Before you begin taking any new medicine, either prescription or over-the-counter, check with your doctor or pharmacist.
Do not share Viagra with others, since they may have a problem that is not effectively treated by this drug. Use of this drug does not protect against sexually transmitted diseases (e.g., HIV, Hepatitis B, gonorrhea). DO NOT take more than 1 tablet daily.
Before you begin using a medication, be sure to inform your doctor of any medical conditions or allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use this medication.
Alcohol: Consumption of alcohol in large amounts may decrease the ability to get an erection and may also temporarily decrease blood pressure, causing dizziness and fainting.
Blood pressure: Tell your doctor if you are taking medications to treat high blood pressure, as the combination of these medications with sildenafil may add to the blood pressure-lowering effect of these medications. You should also let your doctor know if you have or have had low blood pressure.
Grapefruit juice: Grapefruit juice can increase the amount of sildenafil in your bloodstream. Do not drink grapefruit juice when taking this medication.
Hearing problems: If you experience a sudden decrease or loss of hearing you should seek medical attention immediately.
Heart conditions: If you have or have had heart disease or a heart attack or stroke, you should speak to your doctor before taking any medication for erectile dysfunction. If chest pains, dizziness, or nausea are experienced during sex, the exertion should be stopped and your doctor informed.
Kidney problems: If you have poor kidney function you may need lower doses of this medication.
Liver problems: If you have poor liver function you may need lower doses of this medication.
Nitrate-containing medications: Viagra should never be taken with any medications that contain nitrates. Blood pressure may suddenly drop to life-threatening levels if sildenafil is taken with any nitrate-containing medication (e.g., nitroglycerin tablets, spray, or patches) or any other nitrates (e.g., isosorbide dinitrate or amyl nitrite “poppers”). Dizziness, fainting spells, heart attack, or stroke may be experienced.
If use of a nitrate-containing medication is considered medically necessary, you must wait 48 hours after the last dose of sildenafil before taking a nitrate, and only under close medical supervision.
Penis deformation: As with other medications for erectile dysfunction, men with an anatomical deformation of the penis such as angulation, cavernosal fibrosis, or Peyronie`s disease should be closely monitored by their doctors if they take this medication.
Prolonged erection: If an erection lasts longer than 4 hours (a rare occurrence), seek immediate medical assistance. If this condition is not treated quickly, tissue damage and permanent loss of the ability to have an erection could result.
Prostate problems: Tell your doctor if you are taking medications, such as alpha-blockers (e.g., doxazosin), to treat prostate problems, as the combination of these medications with sildenafil may add to the blood pressure-lowering effect of these medications.
Sexually transmitted infections: Viagra does not protect against sexually transmitted infections such as HIV.
Vision problems/eye conditions: If you experience a sudden loss of vision in one or both eyes or other vision related problems, contact your doctor immediately. Vision loss may be partial or complete. While in some cases the condition may improve over time, it can also be permanent.
This rare condition is more likely to occur if you have heart disease, high blood pressure, high cholesterol, diabetes, or eye problems, are more than 50 years old, or if you smoke. If you have any eye conditions, such as retinitis pigmentosa or non-arteritic anterior ischemic optic veuropathy (NAION), tell your doctor.
Pregnancy and breast-feeding: Viagra is not intended for use by women.
Children: Viagra is not intended for use by children or adolescents under 18 years of age.
DRUG INTERACTIONS
There may be an interaction between sildenafil and any of the following:
- alpha-blockers (e.g., doxazosin, terazosin)
- cimetidine
- clarithromycin
- erythromycin
- itraconazole
- ketoconazole
- nitrates (e.g., nitroglycerin, isosorbide mononitrate, isosorbide dinitrate, or amyl nitrite “poppers”)
- protease inhibitors (e.g., indinavir, nelfinavir, ritonavir, saquinavir)
- rifampin
- voriconazole
SIDE EFFECTS
The following side effects have been reported by at least 1% of people taking this medication. Many of these side effects can be managed, and some may go away on their own over time.
Contact your doctor if you experience these side effects and they are severe or bothersome. Your pharmacist may be able to advise you on managing side effects.
- back pain
- diarrhea
- dizziness
- flushing
- headache
- joint pain
- skin rash
- stomach discomfort following meals
- stuffy nose
Although most of the side effects listed below don`t happen very often, they could lead to serious problems if you do not seek medical attention.
Check with your doctor as soon as possible if any of the following side effects occur:
- dizziness, if severe
- redness, burning, or swelling of the eye
- urinary changes or difficulties, including bladder pain, pain urinating, cloudy or bloody urine, urinating more often
- vision changes, including blurred vision, seeing shades of colours differently than before, sensitivity to light, temporary or partial vision loss, or double vision
Stop taking the medication and seek immediate medical attention if any of the following occur:
- chest pains, an irregular heartbeat, or shortness of breath when starting or following sexual activity (if you have a heart condition)
- prolonged (longer than 4 hours), painful, or inappropriate erection of penis
- you have an allergic reaction (e.g., rash; itching; shortness of breath; swollen face, lips, or throat)
Some people may experience side effects other than those listed. Check with your doctor if you notice any symptom that worries you while you are taking this medication.
STORAGE
Store at room temperature between 59 and 86 degrees F (15-30 degrees C) away from light and moisture. Keep this and all medications out of the reach of children
