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Viagra Information

Resource: www.drugs.com

Generic Name: Sildenafil Tablets 25 mg, 50 mg, 100 mg (sil-DEN-ah-fill)
Brand Name: Viagra

Viagra is used for treating sexual function problems in men, such as impotence or erectile dysfunction and other conditions, as determined by your doctor.

Viagra is a phosphodiesterase inhibitor. It works by helping the blood flow into the penis to achieve and maintain an erection.


Do NOT use Viagra if:

  • you are allergic to any ingredient in Viagra
  • you are taking or using azole antifungals (e.g. itraconazole), nitroglycerin (e.g. tablet, patch, ointment), nitrates (e.g. isosorbide), nitroprusside, or ritonavir
  • you have or have had heart disease, including heart attack or angina pectoris; a stroke; low blood pressure, or severe liver problems

Contact your doctor or health care provider right away if any of these apply to you.

Before using Viagra :

Some medical conditions may alter the effects of Viagra . Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

  • 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 life-threatening, irregular heartbeat, uncontrolled high blood pressure, cancer of the blood (e.g. leukemia, myeloma), bleeding disorders or an active stomach ulcer
  • if you have a deformed penis or conditions that may cause a prolonged erection (e.g. sickle cell anemia)
  • if you have kidney problems, bleeding disorders, active stomach ulcers, eye problems (e.g. retina diseases like retinitis pigmentosa) or if you have ever had severe loss of vision

Tell your health care provider if you are taking any other medicines, especially any of the following:

  • Alpha-blockers (e.g. prazosin), azole antifungals (e.g. itraconazole), barbiturates (e.g. phenobarbital), carbamazepine, delavirdine, H2 antagonists (e.g. famotidine), HIV protease inhibitors (e.g. indinavir), hydantoins (e.g. phenytoin), ketolides (e.g. telithromycin), macrolides (e.g. erythromycin), mibefradil, nonnucleoside reverse transcriptase inhibitors (e.g. efavirenz), rifabutin, rifampin or ritonavir, because side effects of Viagra may be more prevalent and intensified.
  • Anticoagulants (e.g. warfarin), nitrates (e.g. isosorbide ), nitroglycerin (e.g. tablet, patch, ointment) or nitroprusside, because the risk of side effects such as bleeding or severe low blood pressure may be increased
  • Bosentan, because side effects may be increased by Viagra

This may not be a complete list of all interactions that may occur. Ask your health care provider if Viagra may alter the effects of 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 Viagra :

Use Viagra as directed by your doctor. Check the label on the bottle for exact dosing instructions.

  • Viagra comes with an additional patient leaflet, which you should read carefully and reread each time you get Viagra refilled.
  • Taking Viagra with a high-fat meal may delay the effects of Viagra .
  • Take Viagra orally between four hours and 30 minutes before sexual activity (about 1 hour before is most effective).
  • Do not take Viagra more often than once a day as needed, though does not need to be used on a daily basis.
  • If you are taking Viagra in doses greater than 25 mg, do not take an alpha-blocker (e.g. doxazosin) within four hours of taking Viagra . Taking these medicines at the same time may cause very serious side effects such as severe low blood pressure.

Ask your health care provider if you have questions about how to use Viagra .

Important safety information:

  • Viagra may cause dizziness, blurred vision, fainting or lightheadedness. Do not drive, operate machinery, or other dangerous activities until you know how you react to Viagra . Using Viagra alone, with certain medicines or with alcohol may lessen your ability to drive or perform other complex tasks.
  • To minimize dizziness or lightheadedness, sit up or stand slowly when rising from a seated or lying position.
  • Viagra may rarely cause a painful penile erection, which can last for long periods of time and is not related to sexual activity. If not treated immediately, this may lead to permanent erectile dysfunction or impotence (not being able to have or maintain an erection for sexual purposes).
  • Do not use Viagra if your doctor has advised you to avoid sexual activity because of heart problems.
  • Viagra does not protect against sexually transmitted diseases, including HIV infection. Use "safe sex" practices such as latex condoms.
  • Older individuals should use Viagra with caution, because they may be more sensitive to its effects.

Possible side effects of Viagra :

All medicines may cause side effects, but many people have slight side effects or none at all. Check with your doctor if any of these most common side effects persist or become bothersome:
Back pain, diarrhea, dizziness, flushing, headache, indigestion, joint pain, lightheadedness, nasal stuffiness, vision changes (e.g. blurred vision, sensitivity to light, impaired blue/green color discrimination).
Seek medical attention right away if any of these severe side effects occur:
Severe allergic reactions (rash, hives, difficulty breathing, tightness in the chest, swelling of the mouth, face, lips, or tongue) , changes in heartbeat, chest pain, fainting, nausea, painful or prolonged erection (lasting more than four hours), severe dizziness, sudden decrease or loss of vision in one or both eyes, urinary tract infection.

This is not a complete list of all side effects that may occur. If you have questions or need medical advice about side effects, contact your doctor or health care provider. You may report side effects to the FDA at 1-800-FDA-1088 (1-800-332-1088) or at http://www.fda.gov/medwatch.

If an overdose is suspected:

Call 911 or get to an emergency room as soon as possible.  Symptoms of an overdose may include fainting, prolonged erection and/or severe dizziness.

Proper storage of Viagra :

Store Viagra at room temperature (77 degrees F/25 degrees C). Store away from a heat source, moisture, and light. Do not store in the bathroom. Storing Viagra at lower temperatures (59 degrees F/15 degrees C) or higher temperature (86 degrees F/30 degrees C) is not harmful if only for a short time. Keep Viagra out of the reach of children and away from pets.

General information:

  • If you have any questions about Viagra, please talk with your doctor, pharmacist, or other health care provider.
  • Viagra is 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.

This information is only a summary. It does not contain all information regarding Viagra. If you have questions about the medicine you are taking or would like more information, check with your doctor, pharmacist or other health care provider.

ManOfPeople.com advice

If you are about to buy Viagra online, but do not know where to buy, here are a few helpful tips:

  1. Do not buy viagra from the first online pharmacy that you come across from your search, especially those which have paid to be the firs advertised
  2. Order Viagra from an online pharmacy that you know you can trust (for example, the online pharmacy that one of your friends used successfully)
  3. If you have no prior experience or good recommendation, read the article "Selecting an online pharmacy" on our site
  4. Try to find reasonably priced Viagra. Nowadays, Viagra prices vary greatly from one site to another. There is always the possibility of finding a good deal on a modest budget. Think about buying generic viagra from a trusted online pharmacy, it will be as effective as a name brand Viagra.