Buy Viagra Online

What is Viagra?

Viagra relaxes muscles found in the walls of blood vessels and increases blood flow to particular areas of the body.

Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women. This page contains specific information for Viagra, not Revatio.

Do not take Viagra while also taking Revatio, unless your doctor tells you to.

Warnings

Some medicines can cause unwanted or dangerous effects when used with Viagra. Tell your doctor about all your current medicines, especially riociguat (Adempas) and nitrates.

Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems, including nitroglycerin, isosorbide dinitrate, isosorbide mononitrate, and some recreational drugs such as “poppers”. Taking sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure.

Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection (priapism) can damage the penis.

Stop using Viagra and get emergency medical help if you have sudden vision loss.

Before taking this medicine

You should not use Viagra if you are allergic to sildenafil, or:

  • if you take other medicines to treat pulmonary arterial hypertension, such as riociguat (Adempas).
  • if you take nitrates.

Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite (“poppers”). Taking sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure.

To make sure Viagra is safe for you, tell your doctor if you have ever had:

  • heart disease or heart rhythm problems, coronary artery disease;
  • a heart attack, stroke, or congestive heart failure;
  • high or low blood pressure;
  • liver or kidney disease;
  • a blood cell disorder such as sickle cell anemia, multiple myeloma, or leukemia;
  • a bleeding disorder such as hemophilia;
  • a stomach ulcer;
  • retinitis pigmentosa (an inherited condition of the eye);
  • a physical deformity of the penis (such as Peyronie’s disease); or
  • if you have been told you should not have sexual intercourse for health reasons.

Viagra can decrease blood flow to the optic nerve of the eye, causing sudden vision loss. This has occurred in a small number of people taking sildenafil, most of whom also had heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoked or were over 50 years old. It is not clear whether sildenafil is the actual cause of vision loss.

Viagra is not expected to harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.

It is not known whether sildenafil passes into breast milk or if it could harm a nursing baby. Tell your doctor if you are breast-feeding a baby.

Do not give this medicine to anyone under 18 years old without medical advice.

How should I take Viagra?

Take Viagra exactly as it was prescribed for you. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.

Viagra is usually taken only when needed, 30 minutes to 1 hour before sexual activity. You may take it up to 4 hours before sexual activity. Do not take Viagra more than once per day.

Viagra can help you have an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Follow your doctor’s instructions.

During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away. You could be having a serious side effect of sildenafil.

Store at room temperature away from moisture and heat.

What happens if I miss a dose?

Since Viagra is used as needed, you are not likely to miss a dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What to avoid

Drinking alcohol with this medicine can cause side effects.

Grapefruit and grapefruit juice may interact with sildenafil and lead to unwanted side effects. Avoid the use of grapefruit products while taking sildenafil.

Avoid using any other medicines to treat impotence, such as alprostadil or yohimbine, without first talking to your doctor.

How long does Viagra take to work and last?

It takes from 30 minutes to 1 hour for Viagra (sildenafil) to start working, and the effects will last for about 4 hours. It is used to treat erectile dysfunction.

Hardness and duration of erections increase with increased dose. Viagra is given as an oral pill, so it has to be absorbed from your stomach to get into your blood and reach your penis. Studies show that Viagra is rapidly absorbed. It reaches its highest blood level between 30 and 120 minutes after taking it. After 4 hours, half of the Viagra has been broken down by the liver. It continues to decrease over the next 20 hours.

Viagra may take longer to work if you take it after a fatty meal because fat slows down absorption in your stomach. Men over age 65 and men with liver disease or severe kidney disease may have longer effects from Viagra, and the dose may need to be lower.

Viagra works by increasing smooth muscle relaxation in the part of the penis called the corpus cavernosum. When the penis is stimulated, a substance called nitric oxide is released. In a series of steps, nitric oxide is turned into a substance called cGMP. This substance causes smooth muscle relaxation that allows more blood to flow into your penis. Viagra inhibits the breakdown of cGMP, which makes an erection harder and longer lasting. Since this process only starts with stimulation of the penis and the release of nitric oxide, Viagra will not give you an erection without your penis also being stimulated.

Viagra can make your penis stay erect longer, but it may not make you last longer. The time to orgasm and ejaculation may not change. Men with early ejaculation or premature ejaculation may not be helped by Viagra. The American Urological Association does not recommend Viagra as a treatment for premature ejaculation.

Erectile dysfunction has many causes. Viagra is not a cure. It does not increase your desire for sex. The most common cause of erectile dysfunction is decreased blood supply to the penis, which may be a warning of decreased blood supply to other parts of your body. Your doctor may check you for high blood pressure, heart disease and type 2 diabetes.

Erectile dysfunction can also be caused by depression, anxiety and drug or alcohol abuse. Your doctor may help you manage these problems before or in addition to prescribing Viagra.

Viagra side effects

Get emergency medical help if you have signs of an allergic reaction to Viagra: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop taking Viagra and get emergency medical help if you have:

  • heart attack symptoms–chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating;
  • vision changes or sudden vision loss; or
  • erection is painful or lasts longer than 4 hours (prolonged erection can damage the penis).

Call your doctor at once if you have:

  • ringing in your ears, or sudden hearing loss;
  • irregular heartbeat;
  • swelling in your hands, ankles, or feet;
  • shortness of breath;
  • seizure (convulsions); or
  • a light-headed feeling, like you might pass out.

Common Viagra side effects may include:

  • flushing (warmth, redness, or tingly feeling);
  • headache, dizziness;
  • abnormal vision (blurred vision, changes in color vision)
  • runny or stuffy nose, nosebleeds;
  • sleep problems (insomnia);
  • muscle pain, back pain; or
  • upset stomach.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Does generic Viagra work just like regular Viagra?

Viagra is the brand name for a medicine known as sildenafil which has been proven to be effective for the treatment of erectile dysfunction. The generic drug contains the same active ingredient as the branded drug, in this case sildenafil citrate, and is therapeutically equivalent to the branded medicine Viagra.

The main difference between a branded and a generic product is mainly price, with the generic usually being cheaper.

Viagra is in a class of impotence drugs known as the phosphodiesterase 5 (PDE5) inhibitors and was the first approved to treat ED. Viagra causes an erection by increasing blood flow to the penis in response to sexual stimulation. Arousal allows the muscles in and around the penis to relax and results in greater blood flow. Viagra does not result in an erection without sexual stimulation. Viagra and other PDE5 inhibitors treat ED, but do not directly increase a man’s sexual desire. However, knowing that one can perform better in bed may indirectly boost libido.

 

What other drugs will affect Viagra?

Do not take Viagra with similar medications such as avanafil (Stendra), tadalafil (Cialis) or vardenafil (Levitra). Tell your doctor about all other medications you use for erectile dysfunction.

Tell your doctor about all your current medicines and any you start or stop using, especially:

  • drugs to treat high blood pressure or a prostate disorder;
  • an antibiotic – clarithromycin, erythromycin, or telithromycin;
  • antifungal medicine – ketoconazole or itraconazole; or
  • medicine to treat HIV/AIDS – atazanavir, indinavir, ritonavir, or saquinavir;
  • nitrates;
  • medications used to treat pulmonary artery hypertension.

This list is not complete. Other drugs may interact with sildenafil, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.

Cialis vs Viagra – What’s the difference between them?

Cialis and Viagra are both PDE5 inhibitors used for the treatment of erectile dysfunction (ED).

  • Both only work when a man is sexually aroused.
  • Cialis lasts for around 36 hours compared with only 4 to 5 hours for Viagra.
  • Food does not affect the activity of Cialis, whereas food may decrease the effectiveness of Viagra.
  • Cialis can be used once daily, at a smaller dosage, and is also effective at treating benign prostatic hyperplasia (BPH).
  • Dosage of Cialis may need to be reduced in men with liver or kidney problems and risk of interactions may be higher than with Viagra.

What ingredients are contained in Cialis or Viagra and how do they work?

Cialis is the brand name for tadalafil and Viagra is the brand name for sildenafil. Both belong to a class of medicines known as phosphodiesterase type 5 (PDE5) inhibitors. PDE5 inhibitors work only in the presence of sexual stimulation, as they rely on the natural release of nitric oxide (NO), a chemical only released during sexual arousal. NO in turn activates other substances to relax the smooth muscle inside the penis to allow the inflow of blood and an erection to occur.1,2,3 PDE5 inhibitors enhance the effect of NO.

Which drug was approved first?

On March 27 th, 1998, Viagra became the first oral pill, and the first PDE5 inhibitor, to be approved by the FDA to treat ED.4 A generic for Viagra was approved in March 2016  and released in December 2017.

Cialis was first approved for ED on November 21st, 2003.  It was the third PDE5 inhibitor to come onto the market (after Levitra [vardenafil]).

Which one lasts for longer?

Cialis has an advantage over Viagra and Levitra in that it lasts for a lot longer – 36 hours, compared with 4-5 hours for Viagra and Levitra.1,2,7 A generic for Cialis was approved in May 2018 and released in September 2018.

How quickly do Cialis and Viagra work and does food have any effect?

Cialis generally works within 16 to 45 minutes, and its activity is not affected by food.

Viagra generally works within 30 minutes, and its effect may be diminished if taken soon after a high fat meal (which may also delay how fast it works). For this reason, Viagra is best taken on an empty stomach.

Effectiveness of all PDE5 inhibitors is similar; although reported effectiveness of Viagra, at 84% is slightly higher than that of Cialis at 81%.7 However, more men prefer Cialis because of its longer duration of effect.

What is the usual dosage of Cialis or Viagra?

Cialis can be taken on an as needed basis, or daily. Generally, daily dosages are smaller than as needed doses. Typically, Cialis is taken as a 10mg starting dose, prior to sexual activity. The effects of Cialis will last around 36 hours. The dosage may be increased to 20mg if 10mg is ineffective or reduced to 5mg if side effects are intolerable.

When Cialis is taken for daily use, the recommended initial dosage is 2.5mg once daily, or 5mg for people who also have BPH. Timing of the daily dosage does not matter in people using it solely for ED; however, those with BPH are advised to take it at the same time each day. Do not take more than one dose a day but your doctor may consider an increase in dosage from 2.5 to 5mg if ineffective. Side effects of Cialis include headache and indigestion.

Viagra is taken on an as needed basis, at a dose of 50mg, approximately 1 hour before sexual activity (although can be taken from 30 minutes to 4 hours before). The dose may be increased to 100mg if 50mg is ineffective or decreased to 25mg if side effects are intolerable.2 Viagra should only be taken once a day even though the effects wear off after approximately 4-5 hours. The main side effects are headache, flushing and indigestion.2 Rarely, color perception may be altered with Viagra. This side effect does not happen with Cialis.

Cost of Viagra varies depending on tablet strength but is approximately $80 per tablet for the 50mg or 100mg strength. Cialis costs approximately $12 for the 5mg strength and $70 for the 20mg strength, per tablet.

Cialis Generic
Cialis Generic

All PDE5 inhibitors are contraindicated with nitrates. The longer duration of action of Cialis means it is at higher risk for drug interactions,1 and dosages may need reducing in men with kidney or liver disease. Cialis is not recommended in men who have had a heart attack or stroke within the past 6 months, with either uncontrolled high blood pressure or severely low blood pressure, unstable angina, or other conditions that make sexual activity inadvisable.