The factors that affect how long Viagra lasts?

Several important factors can influence how long Viagra lasts for you:

    • Dosage. The amount of Viagra you take affects how long it stays in your system. The smallest available dose, 25 milligrams (mg), won’t last as long as the largest available dose, 100 mg. But taking a higher dose isn’t always recommended, as it may not be safe for you.
    • Age. As you get older, your metabolism slows down. So Viagra may last longer as you age. In general, you may notice Viagra works for a longer period when you’re 65 or older.
    • Diet and lifestyle. Eating a large meal or a lot of high-fat foods right before you take Viagra can keep it from being metabolized quickly or effectively. But this can also make it last longer as it’s metabolized along with your meal. Drinking alcohol or smoking can also decrease blood flow to your penis, making Viagra less effective or shorter-lasting.
    • Medications. Some medications, especially antibiotics such as erythromycin (Ery-Tab), clarithromycin (Biaxin), and ciprofloxacin (Cipro), can interact with Viagra and affect how long it lasts.
    • Overall health. Certain existing conditions can affect how long Viagra lasts and how well it works for you. Diabetes, nervous system conditions like multiple sclerosis (MS), and heart conditions like atherosclerosis (fat buildup in your blood vessels) can all make Viagra less effective and not last as long. Some kidney conditions may make Viagra last longer because of the condition’s effect on your metabolism.
    • Psychological state. Feeling anxious, nervous, depressed, or stressed can all influence how your body responds to sexual stimulation. If you’re not relaxed or comfortable during sex, or if you have performance anxiety because of past sexual experiences, Viagra may not last long or be fully effective.

Where to buy Viagra ?

Are you looking to get Viagra online? You can get your medication prescribed online in minutes and delivered straight to your door. Please note that medications will only be prescribed if the doctor feels it is appropriate and safe for you.

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How to get Viagra online ?

First, choose your symptoms

There’s many reasons for why you could be experiencing erectile dysfunction, like stress, anxiety and lack of sleep.

If you don’t have employer / insurer coverage, fees may apply since many of our services aren’t covered by provincial health plans. This is often because of our use of secure messaging and a national network of doctors and nurse practitioners.

Next, you’ll hear from the doctor

Once you’ve entered your symptoms, a doctor or nurse practitioner will review your case. If they’re able to help, your visit will start; if they can’t help, you’ll be notified before your consultation begins and you won’t be charged. You’re only charged if you speak with a Maple doctor.

Most often, you’ll speak to your doctor or nurse practitioner over text, though they may request audio or video chat if it’ll help with your diagnosis.

Get your medication

You’ll get a prescription right on Maple, so you can send it to any pharmacy for pickup, or you can have it shipped with free delivery.

In some cases, a prescription won’t be recommended by the doctor. They will let you know if this is the case. Doctors may also not be able to prescribe some medications in certain provinces or regions.

What to look for when buying Viagra online

To avoid buying counterfeit medications, look for the following:

  • reputable retailer
  • consultation with a licensed medical professional
  • licensed pharmacy that asks for a prescription from your doctor
  • licensed pharmacy with an address in the United States
  • FDA-approved medications
  • clearly labeled containers with the name of the medication and dosage
  • licensed pharmacist who is available to answer any questions afterward
Viagra side effects and risks

Taking Viagra can cause mild or serious side effects. Mild effects may go away in a few days or a couple of weeks and can include:

  • headache
  • flushing
  • indigestion
  • stuffy nose
  • back pain
  • muscle pain
  • nausea
  • dizziness
  • rash

If these side effects don’t go away after a week or so, talk with your prescribing healthcare professional or pharmacist.

Serious side effects are uncommon but may occur. Call your prescribing healthcare professional right away if you experience serious side effects, such as:

  • sudden vision loss in one eye
  • sudden decrease or loss of hearing
  • allergic reaction (hives, itching, or swelling of the face, lips, or tongue)
  • priapism (long lasting and sometimes painful erections)
  • low blood pressure
  • fast heart rate

When to talk with a doctor

If you’re interested in trying Viagra for ED, you’ll need to talk with a healthcare professional first. The FDA requires a prescription for Viagra, both for the brand-name medication and its generic, sildenafil.

Your doctor may offer you a prescription for Viagra if they decide it’s the safest treatment option based on your symptoms, medical history, and overall health.

If you experience a painful or erection that lasts longer than 4 hours, seek emergency care immediately, as it may be a sign of another uro­log­ic con­di­tion.

Seek a doctor immediately if you experience any of these serious side effects:

  • aller­gic reac­tion, like skin rash, itch­ing or hives, and swelling of the face, lips, or tongue
  • shortness of breath
  • chest pain
  • fast, irreg­u­lar heart rate
  • hear­ing loss
  • vision changes
  • seizures

Frequently Asked Questions

What is Viagra and how does it work?

Viagra (sildenafil) is a type of medication used to treat erectile dysfunction. Viagra works by increasing the body’s blood flow to the penis with sexual stimulation. This improves erectile function, making the penis more firm and likely to be adequate for sexual activity.

What are the uses of Viagra?

Viagra is a drug that is used to treat erectile dysfunction. Erectile dysfunction is the inability to maintain an erection sufficient for satisfying sexual activity. If you think you have erectile dysfunction, speak to a doctor on Maple to find out if you’re a candidate to be prescribed Viagra online in Canada.

How to use Viagra?

You can take Viagra as needed, and only once every 24 hours. It typically takes 30 to 60 minutes for the medication to start working, which is when you should be able to maintain an erection. Viagra comes in different dosages depending on what you and your doctor determine to be most suitable for your needs.

What are the side effects and risks of Viagra?

Common side effects of Viagra include flushing, headache, and nose bleeds. You should always speak to your doctor before taking Viagra — they’ll decide whether it’s right for you. To learn more about Viagra’s side effects, see their official website.

What’s the most important information I should know about Viagra?

Do not take Viagra if you take any nitrate medications. Nitrate medications are used to treat chest pain (angina). A sudden drop in blood pressure caused by combining Viagra and these medications can cause you to feel dizzy, faint, or have a heart attack or stroke.

This is why it’s always recommended to speak directly with your healthcare provider.

What happens if Viagra is taken regularly by men?

Viagra is considered safe when taken regularly by men to improve erectile function, but shouldn’t be taken more than once within 24 hours. Doing so can cause side effects such as headache, dizziness, low blood pressure, priapism (a painful erection that can last for hours), and more.

How long does Viagra last after you take it?

Viagra starts to work within 30 to 60 minutes, and can last up to four hours. For a Viagra prescription in Canada, you can speak with a doctor on Maple within minutes. They’ll provide a discreet Viagra prescription online, if deemed necessary, that can be sent to the pharmacy of your choice or delivered to your door at no additional cost.

Who should not take Viagra?

You should not take Viagra if you:

  • Take nitrate medications such as nitroglycerin
  • Use street drugs called “poppers” such as amyl nitrate or amyl nitrite, and butyl nitrate
  • Take any medications called guanylate cyclase stimulators such as Adempas (riociguat)
  • Are allergic to sildenafil, as contained in Viagra, or any of the ingredients in Viagra.

If you think you have erectile dysfunction, speak with a doctor on Maple about being prescribed Viagra online in Canada.

Is Viagra over the counter?

Viagra is not available over the counter because it’s a prescription medication. If you believe you need a Viagra prescription, talk to a doctor about whether you could be experiencing erectile dysfunction, and if getting erection medication online such as Viagra could be a good solution for you.

Does Viagra expire?

Yes, Viagra does expire. Typically, Viagra is considered expired one year from the time the prescription is dispensed. Five years from the time of manufacturing, Viagra becomes inert and loses all effectiveness.

Taking expired Viagra is not dangerous, as long as the regular dosage is taken. However, like many medications, it becomes less effective after it expires. Therefore, it’s not recommended to take expired Viagra, as it’s unclear how well it works.

If you have Viagra at home that’s expired, you can speak with a doctor online on Maple about how to get a new Viagra prescription.

What are Viagra alternatives?

Some ED medications are PDE5 inhibitors that relax smooth muscle tissue and increase blood flow. There are four main types of PDE5 inhibitors:

  • Stendra (avanafil)
  • Levitra (vardenafil)
  • Cialis (tadalafil)
  • Viagra (sildenafil)

If you’re interested in buying Viagra online, read on to learn more about the considerations you should make.

How we chose

We chose the following brands based on user ratings, discreetness, and pricing. Hims, Roman, and Lemonaid all report that a doctor or other qualified or licensed medical professional is involved in determining the appropriateness of the prescribed medication.

The companies listed here, except for Eddie by Giddy, have a Better Business Bureau (BBB) accreditation and rating of A or above. We didn’t find any Food and Drug Administration (FDA) warning letters involving Giddy.

None of the services listed here are covered by insurance.

Does Viagra make you last longer?

Just as there are a number of reasons why someone experiences erectile dysfunction, the same goes for premature ejaculation. And while medications like Viagra can help your erection stay firm, it usually isn’t the first choice for preventing ejaculation.

However, the two issues often happen together, so your provider may recommend Viagra to help with any underlying erectile dysfunction. As a result of treatment, you may see some improvement with how long you last.

But if not, your provider may have you try behavioral methods (e.g., practicing ejaculation control), counseling, or other medications — like numbing creams or antidepressants — to help.

How do I take Viagra for the best results?

Here are a couple tips for taking Viagra safely and effectively:

Follow safe, recommended doses.

The standard recommended dose of Viagra for treating ED is 50 mg, but your doctor could prescribe anywhere from 25 mg to 100 mg.

Viagra is only recommended to be taken once per day. This means that if you’re planning on engaging in sexual activity more than once throughout the day, you shouldn’t take a pill every time. And if you take a pill and it doesn’t work for you — don’t double up and take another one. Exceeding the recommended Viagra dosage can put you at risk for serious effects.

Because Viagra can affect other parts of the body, such as the heart and lungs, it’s important to stick to the dose and instructions your doctor provides. And if your prescribed dose isn’t working for you, they may make adjustments to find one that works.

Take it on an empty stomach.

Although it can be taken with or without food, Viagra tends to work best when taken on an empty stomach. So, to maximize its effects, try to take it separately from meals.

But if you do end up eating beforehand, avoid taking it with a high-fat meal since this can affect how quickly the medication is absorbed — and how fast it kicks in.

How quickly does Viagra work?

After taking Viagra, the medication quickly enters your system and starts working after about an hour, but you can take it anywhere from 30 minutes to 4 hours before sexual activity.

This means that you’ll want to take it about an hour before sexual activity, but you’ve got a wider window of time for when you can still get a benefit. However, as mentioned above, it only works if you’re aroused.

You may be wondering if there are ways to help the medication work even faster, like chewing or crushing the tablet and dissolving it under your tongue. However, it isn’t made to work that way and should be swallowed whole.

How long does Viagra last?

The amount of time that Viagra will last depends on many factors. Dosage, age, and overall health are just some of the factors that can impact how well Viagra works and lasts for someone.

Viagra 100mg

A smaller dosage of Viagra (recommended for older adults) means that the drug won’t last as long.

The average dose of Viagra is 25-100 mg, taken 30 to 60 minutes, or up to four hours before sexual activity. For adults over the age of 65, the recommended dose is 25 mg. Many older adults have slower metabolisms, which means that a lower dose may last longer for them in comparison to a younger person taking a small dose.

Take Viagra before sexual activity, as it takes time for Viagra to absorb into the bloodstream. It’s unlikely that Viagra will help you last longer during sexual intercourse. However, some men—depending on their metabolism—may experience multiple erections while Viagra is in their system. Once it starts working, Viagra typically lasts for up to four or five hours. If you do experience an erection that lasts longer than this (priapism) or is painful, it may be time to seek medical advice.

Viagra won’t necessarily help you recover faster after orgasm. Recovery time (called the refractory period) varies for each individual. Consuming alcohol while taking Viagra can make the medication less effective by decreasing blood flow to the penis.

For people with certain medical conditions, Viagra might not last as long. Feelings of anxiety, depression, or nervousness often cause Viagra not to last as long or be as effective. Having a heart problem, heart disease, diabetes, or other nervous system problems can also cause Viagra not to last as long.

Certain medications may interact negatively with Viagra and interfere with its effectiveness. Drugs that lower blood pressure can interact with Viagra to cause dangerously low blood pressure. Don’t take Viagra with any medication that contains nitrates, which includes street drugs called “poppers” like amyl nitrate and butyl nitrate. Antifungal and antiviral medications may increase the amount of Viagra in the bloodstream, which can lead to toxicity. Talking with your healthcare provider is the best way to determine if Viagra will cause any drug interactions.

How do you know if you need Viagra?

Knowing when to speak to a doctor about getting Viagra can be challenging. Having trouble getting an erection doesn’t necessarily mean that you need to take Viagra. Viagra won’t cure erectile dysfunction. Therefore, it’s essential to look at the potential underlying causes of impotence.

Viagra Online

Some men might not be able to get or maintain an erection for psychological reasons. If you don’t have a desire to have sex with your partner, this could be causing your ED. Talk to a counselor individually or see a therapist with your sexual partner to resolve underlying psychological issues.

The best way to know if you will benefit from taking an erectile dysfunction medication like Viagra is to consult your healthcare provider. They can perform a physical examination and rule out medical conditions that may be causing ED. Some of these health conditions include diabetes, high cholesterol, or high blood pressure.

If you have no underlying psychological or health issues and have trouble getting and maintaining an erection that’s hard enough for sex, you may benefit from taking Viagra.

Once you’ve talked with a healthcare provider, he or she may give you a prescription for Viagra.

If you can’t get to your doctor, there are other options available. “Sildenafil is available online through validated telemedicine sites that connect you to licensed doctors,” says Dr. Williams. “These doctors will conduct an online visit and review your current health status to determine if sildenafil is an option for you. If you are a good candidate, your prescription may be shipped to you conveniently.”

But take caution with where you purchase it: Even though Viagra is available online, it’s one of the most counterfeited drugs in the world. Some counterfeit pills contain printer ink, antibiotics, and even amphetamines. Get a valid prescription and purchase Viagra from a U.S.-based pharmacy accredited by the Verified Internet Pharmacy Practice Sites to avoid counterfeit Viagra.

There are other prescription medications besides Viagra that treat erectile dysfunction. If you aren’t getting the results you want, it may be time to talk to your healthcare provider about other treatment options.

Cialis (tadalafil) and Levitra (vardenafil) also treat ED. The active ingredient that’s in generic Viagra, sildenafil citrate, is also in the medication Revatio. Revatio (sildenafil) treats pulmonary arterial hypertension (PAH), a condition where blood pressure in the lungs is too high.

Professional information for Viagra

The following information is provided for clinicians and other healthcare professionals.


Viagra is approved to treat erectile dysfunction (ED) in males ages 18 years and older.


Viagra is taken orally. It should be taken between 30 minutes and 4 hours before planned sexual activity.

Viagra Mechanism of action

Viagra contains sildenafil citrate, an inhibitor of phosphodiesterase type 5 (PDE5). Viagra enhances the action of cyclic GMP, which is released in the penis in response to sexual stimulation. Cyclic GMP dilates smooth muscle in the penile tissue. It also increases blood to flow into the corpus cavernosum, causing an erection.

Viagra blocks PDE5 from breaking down cyclic GMP, thereby improving the ability to achieve and maintain an erection in response to sexual stimulation.

Pharmacokinetics and metabolism

Sildenafil has an average bioavailability of 41% (ranges from 25% to 63%) after oral administration of Viagra tablets.

When taken on an empty stomach, the time to reach peak plasma concentration (Tmax) is approximately 30 to 120 minutes. The median Tmax is 60 minutes. Taking Viagra with a high-fat meal delays Tmax by about 60 minutes. It also reduces the maximum plasma concentration (Cmax) by an average of 29%.

Sildenafil is primarily metabolized by hepatic CYP3A4, to a metabolite with similar activity to sildenafil. Sildenafil and its active metabolite have a terminal half-life of approximately 4 hours.

Approximately 80% of the dose is excreted in feces, and approximately 13% is excreted in urine.

Reduced clearance of sildenafil is seen in people ages 65 years and over, and in those with hepatic impairment or severe renal impairment.


Viagra is contraindicated in people with a known allergy to sildenafil, or any of the inactive ingredients in Viagra.

Viagra is also contraindicated for use in combination with:

  • nitrate drugs in any form, such as:
    • nitroglycerin (Nitromist, Nitro-Dur, Nitrolingual Pumpspray, Gonitro, others)
    • isosorbide mononitrate (Monoket)
  • guanylate cyclase stimulators, such as riociguat (Adempas)


Store Viagra at room temperature between 68oF and 77°F (20oC and 25°C).

Viagra precaution for pregnancy and breastfeeding

It’s not known if Viagra is safe to take during pregnancy. (But keep in mind that the drug isn’t approved for use in women.)

If you’re sexually active and you or your partner can become pregnant, talk with your doctor about whether you’ll need to use birth control while you’re taking Viagra.

Viagra and pregnancy

Viagra isn’t approved for use in women. And it hasn’t been studied in pregnant women. It’s not known whether this drug is safe to take during pregnancy.

In animal studies, Viagra didn’t cause fetal harm when given to pregnant females. But animal studies don’t always predict what will happen in humans.

If you have questions about the safety of Viagra use during pregnancy, talk with your doctor.

Viagra and breastfeeding

Viagra isn’t approved for use in women. And it hasn’t been studied in women who are breastfeeding. Viagra may pass into breast milk, but it’s not known if this could affect a nursing child.

If you have questions about the safety of using Viagra while breastfeeding, talk with your doctor.