Viagra

Generic Name: Sildenafil

  • What is Viagra?

    Viagra is a medicine used for erectile dysfunction. It aids in producing an erection when you are sexually excited.

  • What is the most important information I should know about Viagra?

    Viagra causes erections only during sexual excitement. It does not work in the absence of arousal.

    You should not take Viagra if you have been instructed by your doctor not to engage in sexual activity due to heart disease or other heart problems. Viagra must never be used by men who are taking medicines that contain nitrates of any kind. If you take Viagra with any nitrate medicine your blood pressure could suddenly drop to an unsafe or life-threatening level.

    Viagra does not cure erectile dysfunction and it does not protect you or your partner from acquiring any sexually transmitted diseases.

    Stop any sexual activity if you experience any chest pain, dizziness, or nausea during sex and get medical help immediately. Sex may put strain on your heart, especially if it is already weak from heart disease.

    If an erection lasts for a long time, it can permanently damage your penis. You should call a doctor immediately if you ever have a prolonged erection that lasts >4 hours.

    Viagra may rarely cause mild but temporary vision changes such as blurred vision or it may give a blue/green color tint to vision. Contact your doctor if vision changes occur.

    Sudden loss or decrease in hearing, sometimes with ringing in the ears and dizziness, has been rarely reported in people taking Viagra. If you experience these symptoms, stop taking Viagra and contact a doctor right away.

  • Who should not take Viagra?

    Viagra is not intended for use by women.

    If you take Viagra with any nitrate medicine, your blood pressure could suddenly drop to an unsafe level. You could get dizzy, faint, or even have a heart attack or stroke.

  • What should I tell my doctor before I take the first dose of Viagra?

    Tell your doctor about all prescription, over-the-counter, and herbal medications you are taking before beginning treatment with Viagra. Inform your doctor if you are taking any blood pressure medications. Also, talk to your doctor about your complete medical history, especially if you have heart disease, angina (chest pain), recently suffered a heart attack, stroke or life-threatening arrhythmia, if you have a physical deformation of your penis, sickle cell anemia, retinitis pigmentosa (eye disease that involves damage to the layer of tissue in the back of the eye, called the retina), or kidney, liver, or blood problems.

  • What is the usual dosage?

    The information below is based on the dosage guidelines your doctor uses. Depending on your condition and medical history, your doctor may prescribe a different regimen. Do not change the dosage or stop taking your medication without your doctor's approval.

    Adults: The usual dosage is 50 milligrams (mg) taken as needed 1 hour before sexual activity. Your doctor may increase the dose to 100 mg or decrease it to 25 mg.

  • How should I take Viagra?

    Viagra may be taken anywhere from 30 minutes to 4 hours before sexual activity; however, 1 hour is usually most effective. You should not take more than 1 dose per day.

    If you take Viagra after a high-fat meal, the medicine may take a little longer to start working.

  • What should I avoid while taking Viagra?

    You should not eat food or take medications that contain nitrates such as processed meats or nitroglycerin.

  • What are possible food and drug interactions associated with Viagra?

    If Viagra is taken with certain other drugs, the effects of either could be increased, decreased, or altered. It is especially important to check with your doctor before combining Viagra with the following: blood pressure-lowering medications such as nitrates or alpha-blockers, or protease inhibitors. Viagra increases the effect of blood pressure medications and may cause a serious drop in blood pressure. Viagra should not be used with any other medical treatments that cause erections.

  • What are the possible side effects of Viagra?

    Side effects cannot be anticipated. If any develop or change in intensity, tell your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking this drug.

    Side effects may include: headache, upset stomach, flushing (skin redness), eyes more sensitive to light, blurred vision, dizziness, decrease in blood pressure

  • Can I receive Viagra if I am pregnant or breastfeeding?

    Viagra should not be used in women.

  • What should I do if I miss a dose of Viagra?

    Viagra is not for regular use. Take it only before sexual activity. Do not take more than one dose in 24 hours.

  • How should I store Viagra?

    Store at room temperature.

Meet the Pharmacists

I'm Kristen Dore, PharmD. Welcome to PDR Health!

Check out my latest blog post on heartburn medication

Viagra Related Drugs