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Viagra may affect the way other medicines work, and other medicines may affect the way Viagra works causing side effects. Especially tell your healthcare provider if

you

Alpha-blockers are sometimes prescribed for prostate problems or high blood pressure. In some patients, the use of Viagra with alpha-blockers can lead to a drop in blood pressure or to fainting. medicines called HIVprotease inhibitors, such as ritonavir (Norvir), indinavir sulfate (Crixivan), saquinavir (Fortovase or Invirase) or atazanavir sulfate (Reyataz) some types of oralantifungal medicines, such as ketoconazole (Nizoral), and itraconazole (Sporanox) some types of antibiotics, such as clarithromycin (Biaxin), telithromycin (Ketek), or erythromycin other medicines that treat high blood pressure other medicines or treatments for ED.

Viagra contains sildenafil, which is the same medicine found in another drug called REVATIO.

REVATIO is used to treat a rare disease called pulmonary arterial hypertension (PAH).

Viagra should not be used with REVATIO or with other PAH treatments containing sildenafil or any other PDE5 inhibitors (such as Adcirca [tadalafil]). Ask your healthcare provider or pharmacist for a list of these medicines, if you are not sure. Keep a list of them to show to your healthcare provider and pharmacist when you get a new medicine. Take Cialis exactly as your healthcare provider prescribes it. Your healthcare provider will prescribe the dose that is right for you. Some men can only take a low dose of Cialis or may have to take it less often, because of medical conditions or medicines they take.

Do not change your dose or the way you take Cialis without talking to your healthcare provider.

Your best place to buy viagra online 2015 healthcare provider may lower or raise your dose, depending on how your body reacts to Cialis and your health condition.

If you take too much Cialis, call your healthcare provider or emergency room right away.

Take Viagra exactly as your healthcare provider tells you to take it. Your healthcare provider will tell you how much Viagra to take and when to take it.

Your healthcare provider may change your dose if needed.

You may take Viagra between 30 minutes to 4 hours before sexual activity if needed.

If you take Viagra after a high fat meal (such as a cheeseburger and french fries), Viagra may take a little longer to start working. If you accidentally take too much Viagra, call your doctor or go to the nearest hospital emergency room right away. Viagra (sildenafil) Viagra is a brand-name prescription drug that’s approved to treat erectile dysfunction (ED). With ED, you’re unable to have or maintain an erection. Viagra is approved for this use in males ages 18 years and older. It belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors.

(A class of drugs is a group of medications that act in a similar way.) Viagra works by increasing blood flow to your

penis

But this drug only works if you’re sexually aroused. In most cases, it should be taken about an hour before sexual activity, but it can be taken 30 minutes to 4 hours beforehand.

Viagra is available in three strengths: 25 mg, 50 mg, and 100 mg. In several clinical studies, Viagra was effective in treating ED. In these studies, men who used the drug had an improved ability to have and keep erections that allowed for successful sex. Across the studies, between 43% and 83% of men who took Viagra had improved erections.

(These rates varied depending on the cause of their ED and the dosage of Viagra being used.) In comparison, improved erections occurred in 10% to 24% of men who took a placebo (no active drug).

To learn more about Viagra’s effectiveness, see the “Viagra uses” section below.

A generic drug is an exact copy of the active drug in a brand-name medication. The generic is considered to be as safe and effective as the original drug.

The following lists contain some of the key side effects that may occur while taking Viagra.

These lists don’t include all possible side effects. For more information on the possible side effects of Viagra, talk with your doctor or pharmacist.

They can give you tips on how to deal with any side effects that may be bothersome. Note: The Food and Drug Administration (FDA) tracks side effects of drugs it has approved. If you would like to report to the FDA a side effect you’ve had with Viagra, you can do so through MedWatch.

Mild side effects of Viagra can include:* headache flushing indigestion mild and temporary vision changes, such as a blue tinge in your vision, blurred vision, and sensitivity to light nasal congestion (stuffy nose) back pain muscle pain nausea dizziness rash.

Most of these side effects may go away within a few days or a couple of weeks. But if they become more severe or don’t go away, talk with your doctor or pharmacist. * This is a partial list of mild side effects from Viagra. To learn about other mild side effects, talk with your doctor or pharmacist, or view the drug’s patient information .

Serious side effects from Viagra aren’t common, but they can occur. Call your doctor right away if you have serious side effects. Call 911 if your symptoms feel life threatening or if you think you’re having a medical emergency.

Serious side effects and their symptoms can include: Non-arteritic anterior ischemic optic neuropathy (NAION), which is an eye condition that causes damage to your optic nerve. Symptoms can include: sudden decrease in vision in one or both of your eyes sudden loss of vision in one or both of your eyes Sudden decrease or loss of hearing.

This condition may also involve other symptoms, such as: tinnitus (ringing or buzzing in your ears) dizziness.

Other serious side effects, which are explained in more detail below in “Side effect details,” include: allergic reaction priapism (long-lasting and sometimes painful erection) low blood pressure, if Viagra is taken with certain other medications cardiovascular problems, such as heart attack, irregular heartbeat, or stroke, all of which occur mainly in people with heart disease. You may wonder how often certain side effects occur with this drug . Here’s some detail on several of the side effects this drug may cause.

As with most drugs, some people can have an allergic reaction after taking Viagra. In clinical studies, less than 2% of people who took Viagra had an allergic reaction.

It’s not known how often allergic reactions occurred in people who took a placebo (no active drug). Symptoms of a mild allergic reaction can include: skin rash itchiness flushing (warmth and redness in your skin) A more severe allergic reaction is rare but possible. Symptoms of a severe allergic reaction can include: swelling under your skin, typically in your eyelids, lips, hands, or feet swelling of your tongue, mouth, or throat trouble breathing. Call your doctor right

away

Rarely, Viagra can cause priapism, which is a long-lasting and sometimes painful erection. But it’s not known how often priapism occurs in men who take Viagra.

Priapism is a medical emergency that needs to be treated right away.

If it’s not treated, the condition can damage the tissues in your penis and cause irreversible erectile dysfunction (ED). If you have an erection that lasts longer than 4 hours, go to the nearest emergency room or call 911. Viagra can temporarily lower your blood pressure after you take the drug. In clinical studies, less than 2% of people who took Viagra had low blood pressure after taking the drug. It’s not known how often low blood pressure occurred in people who took a placebo (no active drug). But keep in mind that a sudden drop in your blood pressure could be dangerous if you have certain heart conditions.

Sudden low blood pressure may also be dangerous if you’re taking certain other medications.

For example, you shouldn’t take Viagra if you take nitrate medications to treat chest pain. You should also avoid taking Viagra if you take a drug called riociguat (Adempas).

Taking Viagra with these medications can cause a dangerous drop in your blood pressure that leads to heart attack or stroke.

If you have low blood pressure, taking Viagra could make you feel dizzy or lightheaded, or cause you to

faint

You’re also more likely to have these problems if you take Viagra with certain drugs used to treat high viagra woman tablet price blood pressure or enlarged prostate.

If you feel dizzy or faint after taking Viagra, lie down until this feeling passes.

If you have a heart problem or low blood pressure, talk with your doctor about whether Viagra is safe for you.

For more information about taking Viagra with other medications, see the “Viagra interactions” section below.

And for more information about taking Viagra if you have heart or blood pressure problems, see the “Viagra precautions” section below.

On rare occasions, some people taking Viagra have had heart attack, stroke, or irregular heartbeat.

These conditions mainly occurred in people who already had a heart problem. But sometimes these conditions occurred in people who didn’t have a heart problem.

It’s not known for sure if Viagra caused the side effects.

If you have chest pain after taking Viagra, you should stop having sexual activity right away. But call 911 if your symptoms feel life threatening, or if you think you’re having a medical emergency. And if you have a heart problem, talk with your doctor before starting Viagra.

They can discuss with you whether it’s safe for you to use this drug.

For more information about taking Viagra if you have heart problems, see the “Viagra precautions” section below.

Headaches, as well as flushing and dizziness, occur because Viagra widens certain blood vessels in your body.

(The drug doesn’t just affect the blood vessels in your penis.) In clinical studies, headaches were reported in 16% to 28% of people who took Viagra.

(This percentage varied depending on the dose of Viagra used and how often the drug was taken.) In comparison, headaches were reported in 4% to 7% of people who took a placebo (no active drug).

If you have a headache after taking

Viagra

If you have a severe headache or a headache that won’t go away, call your doctor. They’ll help determine the viagra pills pharmacy best treatment for your headache.

Men ages 65 years and older tend to get higher levels of Viagra in their blood after taking a dose than younger men do.

Having a higher level of the drug in your body could increase your risk of side effects. Because of this, older men are usually prescribed a dosage of Viagra that’s lower than the dosage given to younger men. In clinical studies of Viagra, there weren’t any differences in side effects seen in men ages 65 years and older compared with those in men younger than 65 years.

If you have concerns about using Viagra given your age, talk with your doctor.

Erectile dysfunction (ED) Taking Viagra doesn’t cause new or worsening ED. However, Viagra can sometimes cause priapism, which is a long-lasting and sometimes painful erection.

Priapism is a medical emergency that needs to be treated right away.

If it’s not treated, priapism can damage the tissues in your penis and cause irreversible ED.

If you have an erection that lasts longer than 4 hours, you should immediately go to an emergency room or call 911.

Most of the mild side effects of Viagra either tend to go away within a few hours of taking your dose or can be easily relieved. For example, headaches, flushing, and dizziness can often be eased by lying down and resting. Avoiding alcohol will also help reduce these side effects.

Headaches and sensitivity to light can also be improved by turning off any bright lights around you.

If you have bothersome headaches with Viagra, ask your doctor or pharmacist to recommend a pain reliever that’s safe for you to use. If you get indigestion after taking Viagra, try taking your dose of Viagra with a snack or light meal. Just be aware that if you do this, Viagra may take slightly longer to start working for you.

(This is especially true if you eat a high-fat meal with your dose.) If your indigestion is bothersome, ask your doctor or pharmacist to recommend medication to help reduce your discomfort. Also keep in mind that certain side effects occur more often with higher doses of Viagra.

These side effects include headaches, flushing, indigestion, nasal congestion, and changes in your vision.

So if these side effects are a problem for you, talk with your doctor about taking a lower dosage of Viagra. Don’t forget that some of Viagra’s rare side effects need immediate medical attention. For example, you should call your doctor right away if you have: an erection that doesn’t go away and lasts for more than 4 hours chest pain, dizziness, or nausea while you’re having sex, and these symptoms don’t go away when you stop having sex and begin to rest sudden loss of vision in one or both of your eyes sudden decrease or loss of hearing.

The Viagra dosage your doctor prescribes will depend on several factors. These include: your age whether you have liver or kidney problems other medical conditions you may have other medications you may be taking.

The following information describes dosages that are commonly used or recommended.

However, be sure to take the dosage your doctor prescribes for you.

Your doctor will determine the best dosage to fit your needs. It’s available in three strengths: 25 mg, 50 mg, and 100 mg. The typical dose of Viagra for erectile dysfunction (ED) is 50 mg.

You can take this dose 30 minutes to 4 hours before you plan to have sexual activity.

But for most viagra gel for sale people, it’s recommended that you take your dose about an hour before having sex.

Your doctor may prescribe a different dosage of Viagra for you depending on several factors.

These factors may include whether you have liver or kidney problems, or if you’re taking certain other medications. If any of these factors apply to you, your starting dose might be 25 mg, which is lower than the typical recommended dose. If you have questions about the Viagra dosage that’s right for you, talk with your doctor. And keep in mind that if Viagra isn’t working for you, your doctor may increase your dose of the drug. Below, we answer some common questions related to Viagra’s dosage.

Your dosage of Viagra won’t be based on your weight, but it may be based on your age. For example, people ages 65 years and older tend to get higher levels of Viagra in their blood after taking a dose. So, if you’re over 65 years of age, your doctor will usually recommend a starting dose of Viagra for you that’s lower than the typical starting dose.