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Viagra is available in the following strengths: 25 mg 50 mg 100 mg. Like Viagra, certain forms of sildenafil are approved to treat ED in males ages 18 years and older.

For example, sildenafil 25-mg, 50-mg, and 100-mg tablets are approved for this use.

In addition, sildenafil also comes as 20-mg tablets.

Sildenafil is also available as a liquid suspension that’s taken by mouth and as a solution that’s given by injection.

These forms of sildenafil are generic versions of a brand-name drug called Revatio. Like Revatio, these forms of sildenafil are used to treat a condition called pulmonary arterial hypertension (PAH).

With PAH, you have high blood pressure in the artery between your heart and lungs. The Food and Drug Administration (FDA) considers generics to be just as safe and effective as the original drug. This means that generic sildenafil is just as effective in treating ED as Viagra is when it’s used at the same doses as Viagra is used.

It also means that sildenafil and Viagra can cause the

same

For information on the possible side effects of Viagra, see the section “Viagra side effects” above.

Viagra is a brand-name drug, while sildenafil is a generic form of Viagra.

Brand-name medications usually cost more than generics. According to estimates on GoodRx.com, sildenafil generally costs much less than Viagra costs.

The actual price you’ll pay for either drug depends on your insurance plan, your location, and your prescribed dosage. Like Cialis (described above), Levitra is also prescribed for similar uses as Viagra. Here we look at how Viagra and Levitra are alike and different.

Viagra contains the drug sildenafil, while Levitra contains the drug vardenafil.

Both Viagra and Levitra belong to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors.

(A class of drugs is a group of medications that work in a similar way.) Viagra and Levitra are both approved to treat erectile dysfunction (ED) in males ages 18 years and older. These drugs work to treat ED by helping you have and maintain an erection when you’re sexually aroused. Viagra and Levitra both come as tablets that are taken by mouth. With Viagra, you’ll take a dose between 30 minutes and 4 hours before you plan to have sex. With Levitra, you’ll take a dose about 1 hour before sexual activity. The medications can help you get an erection for up to 4 hours after you take a dose. But neither drug should be taken more than once a day.

Viagra and Levitra both contain the same type of drug. Therefore, these medications can cause very similar side effects.

These lists contain up to 10 of the most common mild side effects that can occur with Viagra, with Levitra, or with both drugs (when taken individually).

Can occur with Viagra: mild and temporary vision changes, such as a blue tinge to your vision, blurred vision, or sensitivity to light rash muscle pain Can occur with Levitra: sinusitis (inflammation in your sinuses) flu-like symptoms, such as fever, chills, and body aches Can occur with both Viagra and Levitra: headache flushing indigestion nasal congestion (stuffy nose) nausea dizziness back pain.

The following list contains examples of serious side effects that can occur with either Viagra or Levitra. allergic reaction priapism (long-lasting and sometimes painful erection) non-arteritic anterior ischemic optic neuropathy (NAION), which is an eye condition that causes damage to your optic nerve sudden hearing loss low blood pressure, if the drugs are taken with certain other medications cardiovascular problems, such as heart attack, irregular heartbeat, and stroke, all of which occur mainly in people with heart disease.

The only condition both Viagra and Levitra are used to treat is ED.

The use of Viagra and Levitra in treating ED has been directly compared in several clinical studies and compared in several reviews of studies. Based on study information, the American Urological Association considers Viagra and Levitra to be similarly effective in improving men’s ability to have and maintain erections.

Brand-name medications usually cost more than generics. According to estimates on GoodRx.com, Viagra costs more than Levitra costs. The actual price you’ll pay for either drug depends on your insurance plan, your location, and the pharmacy you use.

You may wonder how long Viagra works when it’s used to treat erectile dysfunction (ED). Below, we answer questions related to how long Viagra works inside your body.

If you have other questions about how long Viagra works, talk with your doctor. Viagra typically starts to work between 30 and 60 minutes after you take a dose of the drug.

Instead, you’ll need to be sexually aroused in order for the drug to work.

Viagra keeps working in your body for up to 5 hours.

This means that if you’re aroused, you should be able to achieve an erection for up to 4 hours after taking a dose of Viagra. Even though Viagra keeps working in your reddit viagra without prescription body for several hours, your erection shouldn’t last this long. With this condition, you have a long-lasting and sometimes painful erection. 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 may work faster if you take it on an empty stomach. However, if Viagra is taken with food, especially with a high-fat meal, it will take longer to start working.

And in this case, it could even be less effective for you.

After taking a dose of Viagra, the drug’s level in your body will gradually decrease over a period of a few hours. You’ll have low levels of the drug in your body after about 4 hours. (And at this point, the drug won’t be working any longer.) But it can actually take about 24 hours for Viagra to be completely removed from your body.

Viagra is approved to treat erectile dysfunction (ED) in men.

With ED, you have trouble getting and keeping an erection that’s firm enough to allow you to have sex.

When you’re sexually aroused, either through sexual thoughts or touch, your brain sends messages to your penis. These messages cause certain chemicals to be released in your penis. One of these chemicals, called cyclic GMP, relaxes and widens certain blood vessels in your penis. Cyclic GMP also relaxes the muscles around the erectile tissue in your penis that’s called the corpus cavernosum.

These actions allow blood to flow into the corpus cavernosum, which causes your penis to get hard and become erect. ED can occur if you have certain problems that affect your body’s ability to have an erection. The condition can result from problems with messages being sent from your brain. ED can also result from problems with blood flow into your penis.

Viagra works to treat ED by helping you have and maintain an erection.

The drug does this by improving blood flow into your penis when you’re sexually aroused. Viagra is a type of drug called a phosphodiesterase type 5 (PDE5) inhibitor. It works by inhibiting (blocking) the action of an enzyme called PDE5. (An enzyme is a protein that helps chemical reactions to happen inside your body.) Normally, an erection goes away when PDE5 breaks down the cyclic GMP in your penis.

But Viagra blocks the action of PDE5, so it allows cyclic GMP to keep working for a longer period of time than usual.

This action improves blood flow to your penis and helps you to have and keep an erection. No, Viagra doesn’t directly increase your sex drive.

However, some men find that if Viagra works to treat their erectile problem, it also increases their sexual confidence. Viagra may not work for everyone, and it may not work every time you take it.

If you’re sexually aroused, Viagra should work to help you have or keep an erection within 30 minutes to 2 hours.

But if you don’t get an erection within 4 hours after taking a dose, Viagra didn’t work for you this time. If the drug doesn’t work for you, you shouldn’t take another dose until at least 24 hours later.

And talk with your doctor if you feel Viagra isn’t helping to treat your ED. They may recommend that you try a different medication for your ED. It’s important to remember that Viagra only works if you’re already sexually aroused. Arousal may involve having sexual thoughts, looking at sexual images, masturbating, or engaging in foreplay.

But if you feel anxious, nervous, depressed, or stressed, your body may not respond well to sexual stimulation. If this is the case, try to relax, make yourself comfortable, and take your time. In addition, it’s best to avoid drinking a lot of alcohol. This is because consuming large amounts of alcohol can make it more difficult for

you

If you’re having trouble getting an erection, even while using Viagra, talk with your doctor. Instead, it belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. (A class of drugs describes a group of medications that work in a similar way.) Viagra works by inhibiting (blocking) the action of a certain enzyme in your body. Since Viagra has been released onto the market, there have been a few reports of bleeding in people who’ve taken the drug.

However, there’s no evidence that Viagra caused these bleeding problems.

It’s not known if Viagra is safe for use by people with a bleeding problem.

If you have any bleeding problems, talk with your doctor about whether Viagra is safe for you.

Here are answers to some frequently asked questions about Viagra. And for answers to questions related to Viagra’s dosage, see the section “Viagra dosage” above. No, studies haven’t shown that Viagra makes sex last longer.

However, the drug can help you to get and keep an erection.

And studies have shown that Viagra can increase satisfaction from sex. No, Viagra viagra without prescription us doesn’t increase the size of a man’s penis. In fact, to date, there aren’t any known ways to permanently increase the size of a man’s penis. Viagra helps you get an erection if you’re sexually aroused. This may temporarily increase the size of your penis, until the erection goes away.

But Viagra doesn’t permanently increase the size of your penis. Yes, Viagra is generally considered safe to use if: it’s been prescribed by a doctor who knows your medical history you’re taking the drug as directed. Viagra’s safety has been shown in several clinical studies.

The drug does have a few serious side effects, but these rarely occur. For more information about the side effects of Viagra, see the section “Viagra side effects” above. However, Viagra may not be safe to use if you have certain medical conditions, including heart disease.

And it’s not safe to use Viagra if you’re taking certain other medications, such as nitrates. (Nitrates are sometimes used to treat chest pain that’s related to heart problems.) This is why you should only take Viagra if it’s been prescribed by a doctor who knows your medical history.

For more information about conditions that may make it unsafe for you to take Viagra , see the “Viagra precautions” section below.

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

Can you take Viagra if you have high blood pressure? For example, if you have high

blood

Just be aware that taking the drug could cause your blood pressure to be lowered.

Low blood pressure from Viagra usually isn’t a problem for most people. But if you’re taking a type of blood pressure drug called an alpha-blocker, taking Viagra might cause certain side effects. These side effects can include dizziness, lightheadedness, or even fainting.

For more information about using Viagra with alpha-blockers, see the “Viagra interactions” section below.

If you have high blood pressure that’s controlled with medication, your doctor may prescribe a dose of Viagra for you that’s lower than the typical dose. Before starting Viagra, talk with your doctor about any blood pressure problems you have.

Yes, for most people, Viagra works the first time it’s used. But for other people, it may take a few times of trying the drug to get the desired effect.

Keep in mind that you shouldn’t take Viagra more than once every 24 hours.

If Viagra doesn’t seem to work for you, talk with your doctor. They may increase your dose of the drug or recommend that you try a different medication. Does Viagra help me keep an erection after ejaculation?

But even if your erection goes away after you’ve ejaculated, Viagra can help you to get another erection for up to 4 hours after you’ve taken a dose.

The safety and effectiveness of taking Viagra through your nose hasn’t been tested. Can I take Viagra after I’ve had my prostate removed?

However, Viagra may be less effective in treating erectile dysfunction (ED) in men who’ve had their prostate removed than it is in men who haven’t. Across several clinical studies, Viagra was effective in 43% of men who’d had this surgery.

And a placebo (treatment with no active drug) was effective in 15% of men who’d had the surgery. In comparison, in studies of men with ED due to: complications from diabetes, 57% had improved erections with Viagra.

This is compared with 10% of men who took a placebo.

spinal cord injury, 83% had improved erections with Viagra. This is compared with 12% of men who took a placebo. If you have questions about using Viagra after you’ve had your prostate removed, talk with your doctor. In fact, one study found that Viagra was effective in 57% of men with erectile dysfunction (ED) that was thought to be related to diabetes.

In several studies, Viagra has been looked at as a possible treatment for premature ejaculation (PE). And typically, you’ll ejaculate within 1 minute of penetration when you’re having sex.) Some studies found that Viagra can help men with PE to delay ejaculation longer than they could without treatment.

However, other studies didn’t show that Viagra had a significant effect in treating PE.

More research is needed to know for sure whether or not Viagra is effective for treating PE. Keep in mind that Viagra isn’t approved in the United States to treat PE. And it’s not recommended in current PE treatment guidelines from the American Urological Association. However, Viagra is recommended in similar guidelines from the European Association of Urology.

If you’re interested in taking Viagra to treat PE, talk with your doctor. What’s the youngest age for which Viagra is safe to use? Viagra is approved for use in males ages 18 years and older. You shouldn’t take Viagra if you’re younger than 18 years.

This is because the safety and effectiveness of Viagra haven’t been studied in people of this age group. The manufacturer of Viagra doesn’t give any specific warnings about drinking alcohol while using this drug. But in general, it’s best to avoid drinking lots of alcohol with the medication. This is because certain side effects of Viagra may be worsened by alcohol.

This includes such side effects as headaches, flushing, and dizziness.

And drinking lots of alcohol can also make it more difficult to get an erection, which is what you’d be using Viagra to do.

If you drink alcohol, talk with your doctor about how much is safe for you to drink while you’re taking Viagra.

Viagra can interact with several other medications.

Different interactions can cause different effects. For instance, some interactions can interfere with how well a drug works. Other interactions can increase side effects or make them more severe.

Below are lists of medications that can interact with Viagra. These lists don’t contain all the drugs that may interact with Viagra. Before taking Viagra, talk with your doctor

and

Tell them about all prescription, over-the-counter, and other drugs you take.

Also tell them about any vitamins, herbs, and supplements you use.

Sharing this information can help you avoid potential interactions. If you have questions about drug interactions that may affect you, ask your doctor or pharmacist.

You shouldn’t take Viagra with any other medications for erectile dysfunction (ED).

This includes prescription medications, such as: tadalafil (Cialis) avanafil (Stendra) vardenafil (Levitra, Staxyn) alprostadil (Muse, Caverject, Caverject Impulse, Edex) It also includes natural or over-the-counter ED treatments, such as l-arginine and yohimbine.

Taking Viagra with other ED medications increases your risk of certain side effects, such as low blood pressure and priapism.* If you’re using Viagra, don’t use any other medications for ED without talking with your doctor. * Priapism is a long-lasting and sometimes painful erection that doesn’t go away. It’s a medical emergency because it can damage the tissues in your penis and lead to permanent ED.

This includes certain prescription drugs, such as nitroglycerin, used to treat angina (a type of chest pain).

It also includes certain illicit drugs called poppers, such as amyl nitrate. Taking Viagra with nitrates can cause a dangerous drop in your blood pressure that can lead to heart attack or stroke. Examples of nitrate drugs that should not be taken with Viagra include: nitroglycerin (Nitromist, Nitro-Dur, Nitrolingual Pumpspray, Gonitro, others) isosorbide mononitrate (Monoket) isosorbide dinitrate (Dilatrate SR, Isordil) glyceryl trinitrate amyl nitrate alkyl nitrate butyl nitrate.

Viagra and drugs for pulmonary arterial hypertension.

You shouldn’t take Viagra if you’re taking the pulmonary arterial hypertension (PAH)* drugs listed below. Taking Viagra with these medications can cause your blood pressure to drop too low.

Examples of drugs used to treat PAH that should not be taken with Viagra include: riociguat (Adempas) sildenafil (Revatio) tadalafil (Adcirca) * With PAH, you have high blood pressure in the artery between your heart and lungs.